CN113048837B - Method for establishing gun firing-ignition fault tree in special environment - Google Patents
Method for establishing gun firing-ignition fault tree in special environment Download PDFInfo
- Publication number
- CN113048837B CN113048837B CN202110289007.XA CN202110289007A CN113048837B CN 113048837 B CN113048837 B CN 113048837B CN 202110289007 A CN202110289007 A CN 202110289007A CN 113048837 B CN113048837 B CN 113048837B
- Authority
- CN
- China
- Prior art keywords
- primer
- firing
- ignition
- environment
- firearm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
- F41A31/00—Testing arrangements
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/90—Details of database functions independent of the retrieved data types
- G06F16/901—Indexing; Data structures therefor; Storage structures
- G06F16/9027—Trees
Abstract
The invention belongs to the field of firearms, and provides a method for establishing a firearm firing-ignition fault tree in a special environment, which comprises the following steps: defining a firearm firing-ignition system; analyzing the action mechanism of the gun firing-ignition system, and determining fault influence factors of the gun firing-ignition system from the aspects of design, manufacture and use; determining fault influence factors of special environments on a gun firing-ignition system, wherein the special environments comprise a high-low temperature environment, a dust raising environment, a river soaking environment and/or a salt spray environment; establishing a typical fault tree of a gun firing-ignition system in a special environment by adopting a deduction method; the invention discloses a firing-ignition action mechanism of a firearm; based on the method, various influence factors causing the firing-ignition fault of the firearm are comprehensively considered, particularly the influence of special environmental factors on the firing-ignition performance of the firearm is analyzed, the possible fault caused by the factor is analyzed, and support is provided for reliability analysis and design of a firing-ignition system of the firearm.
Description
Technical Field
The invention belongs to the field of firearms, relates to establishment of a firearm firing-ignition fault tree, and particularly relates to an establishment method of the firearm firing-ignition fault tree in a special environment.
Background
Firearms are the basic equipment for army, sea, air and military and armed police, preparedness, etc., which kill exposed animate objects by firing a bullet. When the firearms are shot, the trigger is pulled, the hammer strikes the firing pin under the action of the spring force of the hammer, the firing pin strikes primer, the primer is ignited to ignite propellant powder, and a large amount of generated gunpowder gas pushes the bullet to move out of the chamber at high speed. The components of the firearm system that complete the function of firing the primer to ignite the propellant charge are collectively referred to as the firearm firing-firing system. The performance of a firearm firing-ignition system directly influences the firing task of the firearm, and whether a firearm firing mechanism can reliably fire primer and ignite propellant powder is the key for realizing smooth firing of a bullet and ensuring the firing precision of the bullet.
However, firearms are affected by various factors such as design, manufacture, assembly process and damage accumulation in the using process, and various firing-ignition faults such as no firing, weak firing, delayed firing, early firing, primer breakdown and the like often occur in the using process of armies, especially in various special extreme combat environments such as severe cold, islands, deserts, high temperature, high humidity, plateaus and the like, so that the automatic shooting process is slightly affected, key parts of firearms are damaged, and casualties are seriously caused. Therefore, it is important to analyze and evaluate the operational reliability and safety of the firearm firing-ignition system.
The analysis of the gun firing-ignition fault tree is an important method for analyzing and evaluating the reliability/safety of the gun firing-ignition system, and the firing-ignition fault tree is established by analyzing various factors such as design, manufacture, assembly, use, environment and the like, so as to determine various possible reasons causing the gun firing-ignition fault. The traditional firing-firing fault tree building method has the following defects:
1) various factors causing faults, especially special environmental factors, cannot be comprehensively considered in the fault tree building process;
2) in the process of establishing the fault tree, design, manufacture and use factors are only considered macroscopically, and the levels of structure size, material performance parameters, process parameters, primer/propellant thermodynamic performance, chemical reaction performance and the like cannot be refined. The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is already known to a person skilled in the art.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a construction method of a gun firing-ignition fault tree in a special environment by comprehensively considering factors such as design, manufacture, process, use and the like and emphatically considering the influence of special environmental factors on firing-ignition performance on the basis of deeply researching firing-ignition mechanisms such as firing mechanism dynamics kinematics, firing pin primer cartridge case impact dynamics, primer thermal/mechanical/chemical coupling action ignition and the like; the method comprises the following steps:
s1, defining a firearm firing-ignition system;
s2, analyzing the action mechanism of the firearm firing-ignition system, and determining fault influence factors of the firearm firing-ignition system;
s3, determining fault influence factors of special environments on the firearm firing-ignition system, wherein the special environments comprise high/low temperature environments, dust raising environments, river soaking environments and/or salt spray environments;
and S4, and establishing the fault tree of the firearm firing-ignition system under the special environment by adopting an algorithm in combination with the fault influence factors determined by the S2 and the S3.
By combining the technical scheme, the invention has the beneficial effects that:
(1) deeply researching the action mechanism of firing and ignition of the gun and revealing that the action mechanism is a gun and bullet matching and thermal, mechanical and chemical coupling action process;
(2) based on the action mechanism of firing-ignition of the firearm, various influence factors causing firing-ignition faults of the firearm are comprehensively considered, particularly special environmental factors;
(3) based on the action mechanism of firing and ignition of the firearm, the influence of various factors such as structure size, material performance parameters, process parameters, special environment, thermodynamic performance and chemical reaction performance of the primer powder/propellant powder on the firing and ignition performance of the firearm is deeply researched, and possible faults caused by the factors are analyzed;
(4) support is provided for reliability analysis and design of a firearm firing-ignition system.
Drawings
In order to clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following descriptions are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of a firearm firing mechanism in an embodiment of the present invention;
FIG. 2 is a schematic view of the structure of the firing pin impacting the primer in the embodiment of the present invention;
FIG. 3 is a diagrammatic view of the firing and automation of the firearm in an embodiment of the present invention;
FIG. 4 is a mission profile view of a firearm firing-ignition system in an embodiment of the present invention;
FIG. 5 is a functional block diagram of a firearm firing-ignition system in an embodiment of the present disclosure;
FIG. 6 is a block diagram of the reliability of the firearm firing-ignition system in an embodiment of the present invention;
FIG. 7 is a tree diagram of firearms misfire/misfire faults in a particular environment in accordance with an embodiment of the present invention;
FIG. 8 is a tree diagram illustrating the unfired fault of the firearm under a particular environment in accordance with an embodiment of the present invention;
FIG. 9 is a tree diagram illustrating the weak firing fault of a firearm in a particular environment according to an embodiment of the present invention;
FIG. 10 is a tree diagram of the early firing faults of firearms in a special environment according to an embodiment of the invention;
FIG. 11 is a chart of a breakdown fault of a firearm primer in a special environment according to an embodiment of the invention;
fig. 12 is a general flow chart of a method of establishing a fault tree in an embodiment of the present invention.
Icon: 1. a retainer ring; 2. a hammer; 3. a hammer spring guide rod; 4. a spring seat ring is arranged in a restoring way; 5. a firing pin; 6. a bolt machine; 7. sleeving; 11. a primer mixture; 12. a primer shell; 13. a tin foil cover sheet; 14. and (4) a cartridge case.
Detailed Description
The objects, aspects and advantages of the present invention will become apparent from the following detailed description, which, when taken in conjunction with the drawings, illustrate by way of example only some, but not all, of the features of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a method for establishing a gun firing-ignition fault tree in a special environment, which comprises the following specific implementation steps of:
s1, defining a firearm firing-ignition system; the method specifically comprises the following steps:
s11, determining the structural composition of a firearm firing-ignition system;
the structure of the firearm firing-ignition system comprises a firearm firing mechanism, a bullet primer, a bullet shell and propellant powder; taking a firing-ignition system of a small-caliber firearm as an example, the structural schematic diagram of a firing mechanism of the firearm is shown in fig. 1, and the firing mechanism comprises a hammer 2, a hammer spring guide rod 3, a firing pin 5, a retainer ring 1, a recoil spring seat ring 4, a gunlock 6 and a joint sleeve 7;
the bullet primer comprises a primer shell 12, a primer 11 and a tinfoil cover plate 13; the bullet shell 14, the bullet primer, the propellant powder and the bullet form a bullet; the firing pin strikes the primer in a schematic view as shown in fig. 2.
S12, determining the task function and the working mode formed by each structure of the firearm firing-ignition system;
in a firing-ignition system of a firearm, the firearm firing mechanism is used to strike a bullet primer; the hammer 2 is released by pulling a trigger sear, the hammer 2 strikes the firing pin 5 under the action of the spring force of the hammer, and the firing pin 5 strikes the bullet primer; the firearm firing mechanism can be divided into a hammer translation type and a hammer rotation type according to the mode that the hammer 2 strikes the firing pin 5;
the bullet primer is an impact primer, an impact ignition mode is adopted, after the bullet primer is impacted by the firing pin 5, the propellant powder 11 forms hot spots to ignite under the extrusion and friction effects, and the flame ignites the propellant powder through the fire transfer holes;
the propellant powder has the function that after the propellant powder is ignited, the propellant powder is quickly combusted to generate a large amount of gas, and the pressure intensity is quickly increased, so that the bullet is pushed to accelerate in the gun barrel by utilizing the pressure intensity difference between the pressure intensity in the gun barrel and the external atmospheric pressure;
the shell of the bullet is used for containing propellant powder, connecting a bullet head with primer together and bearing the gas pressure of the propellant powder and the acting force of an automatic firearm machine during launching;
the firing and automatic principle of a typical firearm is shown in fig. 3.
S13, drawing a block diagram of the firearm firing-ignition system, wherein the block diagram at least comprises a functional block diagram.
After the functions and working requirements of the firearm firing-ignition system are defined, the components of the firearm firing-ignition system and the interrelation among the components are described in a mode of drawing a product block diagram, and the product block diagram can not only clearly describe the range and the boundary of a product, but also provide clear clues and basis for logical reasoning in analysis.
The block diagram of the firearm firing-ignition system comprises a functional block diagram which is used for describing each component of the firearm firing-ignition system and the task or function undertaken by the component, and represents the interrelation among the components, as shown in fig. 5, the functional block diagram comprises a hammer spring, a hammer spring guide rod, a hammer, a firing pin, a gunlock, a primer shell, a fire platform, a primer, a fire transfer hole, a propellant powder, a bullet shell and a bullet.
The bullet primer is divided into a Bodan type structure and a Boke plug type structure, and the Bodan type primer adopts a 'dead fire platform', namely the fire platform is fixed on the bullet shell; the bock type primer adopts a 'fire activating platform', namely the fire activating platform is assembled in the primer.
Preferably, the block diagram of the firearm firing-firing system further comprises a reliability block diagram; the reliability block diagram describes the relationship between the reliability and the overall reliability of each component of the firearm firing-ignition system from the fault point of view, and provides a basis for analyzing the influence of the fault of each component of the firearm firing-ignition system on other parts and the overall firearm. A firearm firing-firing system reliability block diagram is shown in fig. 6.
Preferably, the step S1 further includes, before the step S13: a mission profile of the firearm firing-ignition system is determined.
A task profile refers to a time-sequential description of the events and circumstances that a product experiences during the time a specified task is completed. The task profile of a typical firearm firing ignition system is shown in fig. 4.
S2, analyzing the action mechanism of the firearm firing-ignition system, and determining fault influence factors of the firearm firing-ignition system;
the firing-ignition process of the firearm is mainly completed by striking a primer with a firing pin to fire a firing agent, and is a thermal/mechanical/chemical interaction process. The percussion-ignition action mainly comprises the links of providing the energy and the speed of the firing pin for striking the primer by the action of a percussion mechanism, consuming a part of striking pin striking energy under the action of striking dynamics of a firing pin primer shell system and converting the striking pin striking energy into ignition energy, generating hot spots and rapidly growing under the action of thermal/mechanical/chemical coupling of the primer, igniting the primer when the ignition condition of the primer is reached, and the like. The action reliability of each link is influenced by factors such as design, manufacture, process, use, environment and the like, and all factors influencing firing-ignition faults are determined by analyzing the specific factors influencing the action reliability of each link. Specifically, the method comprises the following steps:
analyzing the action mechanism of the firearm firing-ignition system by combining the functional block diagram of the firearm firing-ignition system, and respectively determining the following factors:
s21, determining factors which do not strike primer due to the movement of the firing mechanism, including design and manufacture factors and use factors;
the design and manufacture factors influencing the non-firing include at least one of insufficient strength of a hammer spring, poor fatigue resistance of the hammer spring and jamming of the hammer due to interference of the hammer motion and other components;
the using factors comprise at least one of the influence of excessive use times of the hammer spring and excessive dirt on the hammer movement;
s22, determining factors which influence the action of a firing mechanism of the firearm so as to influence the energy of the firing pin striking the primer, wherein the factors comprise design and manufacture factors and use factors;
the design manufacturing factors include: at least one of the bullet bottom clearance, the bolt taper hole, the projecting amount of the firing pin, the energy of the hammer spring and the interference existing in the motion process of the hammer; the use factors include: at least one of the deformation or damage of the firing pin, the flattening of the arc surface of the head of the firing pin and the failure of the in-place safety mechanism leads the hammer not to be released and the failure of the hammer spring;
the bullet bottom clearance is the vertical distance between the plane of the bullet bottom nest of the gun bolt and the bottom surface of the bullet shell after bullet feeding is in place and locked; the bolt taper hole is used for controlling the inertia projection amount of the firing pin.
S23, determining design and manufacture factors which influence the impact dynamic performance of the firing pin primer shell system so as to influence the efficiency of firing energy transfer and conversion into ignition energy;
the fire primer is characterized by comprising at least one of the shape and the size of a head part of a firing needle, the center position of a firing powder surface, the degree of deflection of a firing needle, the hardness of a bottom material of a primer shell, the thickness of the primer shell bottom, the height of a fire table from the firing powder surface, the shape and the size of the fire table, the filling depth of primer, small fillet of a mouth part of a primer chamber, scarification of the primer wall part, filling of primer into an inclined primer central concave and convex part, over-tight matching of a cartridge case and the primer, improper axial size matching relation among the height of the cartridge case fire table, the height of the primer powder surface and the filling depth of the primer and insufficient strength of the primer shell;
s24, determining design and manufacture factors influencing the ignition critical conditions of the primer mixture, wherein the design and manufacture factors comprise at least one of uneven primer mixture components, multiple tinfoil cover sheets, high primer pressing pressure and missing primer mixture;
s25, determining design and manufacturing factors influencing the ability of the primer output flame to ignite the propellant powder, wherein the design and manufacturing factors comprise at least one of uneven propellant powder components and propellant powder/propellant powder loading;
s26, determining influence factors causing the primer to be impacted under the abnormal firing condition so as to cause early ignition, wherein the influence factors comprise design and manufacture factors and use factors;
the design manufacturing factors include: at least one of premature release of the hammer, excessive quality of the firing pin, excessive projecting amount of the firing pin, excessive re-entering speed of the automatic machine and wedging between the firing pin tip and the conical hole of the gun bolt due to failure of the in-place safety mechanism;
the factors include needle rust.
S3, determining fault influence factors of special environments on the firearm firing-ignition system, wherein the special environments comprise high/low temperature environments, dust raising environments, river soaking environments and/or salt spray environments;
1) high/low temperature environment
High/low temperature affects primer/primer mix by affecting primer/primer mix thermal performance parametersThe critical ignition conditions of the propellant powder comprise critical ignition parameters such as critical firing pin impact energy, primer output flame length/pressure and the like. The thermal parameters of the primer include specific heat capacity, coefficient of thermal conductivity, etc., the specific heat capacity
Is an important index reflecting the heat absorption capacity of the primer, wherein in the formula,
the heat flux curve is a DSC heat flux curve, and has important influence on heat conduction and temperature rise conditions after thermal decomposition of the primer; in a high-temperature environment, the heat conduction coefficient is too large, the ignition heat transferred to the primer mixture does not heat the primer mixture to the ignition degree, and the heat is dissipated quickly, so that the ignition is difficult. The specific heat capacity and thermal conductivity of the primer gradually increase with increasing ambient temperature, and changes in these thermal performance parameters result in changes in the critical ignition conditions of the primer, such as impact energy/velocity. Specifically, the factors affecting the failure of the firearm firing-ignition system due to the high/low temperature environment include:
the high/low temperature has influence on the mechanical property of a metal material in the firing-ignition system of the firearm, so that the impact deformation energy loss of the firing-ignition system is influenced, and the transmission and conversion rate of firing energy into ignition energy are further influenced;
at least one of an influence of high/low temperature on a specific heat capacity of the primer, an influence of high/low temperature on a thermal conductivity coefficient of the primer, an influence of high/low temperature on an activation energy of the primer, an influence of high/low temperature on a chemical reaction rate of the primer, an influence of low temperature on an ignition condition of the primer, and an influence of high/low temperature on an ignition critical condition of the primer;
2) dust environment
Under the dust raising environment, small solid particles such as sand, dust and the like are doped between the firing mechanism kinematic pairs, so that the friction force can be increased, and under the same input condition, the resistance of the mechanism motion is increased, the output energy of the firing mechanism is influenced, and the impact speed or energy of the firing pin is influenced; in addition, with the increase of the shooting number, the abrasion among the mechanisms is increased, so that the movement of the mechanisms is blocked, and the normal movement of the shooting mechanism is influenced; specifically, the factors affecting the failure of the firearm firing-ignition system caused by the dust environment include:
the impact and friction characteristics of the dust environment on the firing mechanism of the firearm are influenced to reduce the firing energy, the dust environment causes the hammer motion to interfere with other components to be blocked, and the dust environment influences the hammer motion;
3) river water immersion environment
Under the river water immersion environment, the friction force between firing mechanisms is influenced due to the water lubrication effect, so that the impact speed or energy of a firing pin is influenced; silt in river water is also mixed between the mechanism kinematic pairs to increase friction force, so that the impact speed or energy of the striker is reduced; specifically, the factors influencing the fault of the firing-ignition system of the gun in the river-soaking environment include:
the impact and friction characteristics of the river-soaking environment on the firing mechanism of the gun are influenced to reduce firing energy, the primer is wetted in the river-soaking environment, and the river-soaking environment influences the motion of the hammer/firing pin;
4) salt fog environment
Under the salt spray environment, the surface of the firing mechanism is rusted, surface pits and roughness are increased, and the collision and friction characteristics of the firing mechanism are influenced, so that the impact energy of the firing pin is influenced. Specifically, the fault influence factors of the salt fog environment on the firearm firing-ignition system include:
the impact of the salt spray environment on the surface roughness of the firing mechanism causes at least one of reduction of firing energy, wetting of the primer under the salt spray environment, and wetting of the primer under the salt spray environment.
And S4, and establishing the fault tree of the firearm firing-ignition system under the special environment by adopting an algorithm in combination with the fault influence factors determined by the S2 and the S3.
The method is characterized in that typical faults of a firing-ignition system, such as 'no firing/late firing', 'no firing', 'weak firing', 'early firing', 'bottom fire breakdown', and the like, are taken as top events, based on a firing-ignition mechanism of thermal, mechanical and chemical coupling effects, various parts causing various typical faults of the gun firing-ignition system are analyzed from system function levels, such as firing energy, ignition capability, primer/propellant ignition critical conditions, bottom fire output capability, propellant ignition condition matching capability and the like, then specific reasons of the parts causing the functional faults are sorted respectively from aspects of design, manufacture, use conditions, environmental factors and the like, then a tree building method is manually carried out by applying a deduction method, and a fault tree is built hierarchically from the functional faults of the whole system to the functional faults of each part.
1) Failure tree for non-ignition/late ignition
When the firing pin impacts the primer of the bullet, the primer can not normally act or the output high-temperature and high-pressure gas can not meet the requirement of igniting the propellant powder, so that the propellant powder can not be ignited or the acting time is prolonged. The corresponding step S4 further includes:
s41, determining whether the misfire or the delayed misfire is the top event of the fault tree;
s42, based on the thermal, mechanical and chemical coupling effect percussion-ignition mechanism, analyzing from the aspects of firearms and bullets, determining the direct cause events of non-ignition/delayed ignition as insufficient percussion energy, insufficient ignition capability, improved ignition critical condition of primer, unmatched primer output capability and ignition condition of propellant;
s43, setting up a reason event of the direct reason event;
wherein, the cause events of insufficient firing energy are insufficient firing pin projection and insufficient firing pin energy; the events of reasons of insufficient ignition capability are mismatching of a firing pin structure and a primer, low primer sensitivity and defective cartridge case ignition structure;
the ignition critical condition of the primer is improved, the primer output capability is not matched with the ignition condition of the primer, and no causal event is set;
s44, respectively carrying out system combing on specific reasons of functional faults caused by the parts from the aspects of design, manufacture, service conditions, environmental factors and the like, establishing basic events of all reason events, and completing the establishment of a non-ignition/delayed ignition fault tree;
wherein the content of the first and second substances,the basic events of insufficient firing pin projection include: too large gap X at bullet bottom 1 Unreasonable design of gun bolt taper hole X 2 The projection of the firing pin is designed to be over-small X 3 Deformation or damage of firing pin X 4 The arc surface of the head of the firing pin is flattened by X 5 ；
The basic events of the firing pin energy shortage include: energy design value of hammer spring is over small X 6 Excessive firing energy loss X caused by interference in the motion process of the hammer 7 In-place safety failure to prevent the hammer from releasing X 11 Failure of hammer spring X 12 The impact and friction characteristics of the firing mechanism are influenced by the river-soaking environment, so that the firing energy is reduced X 8 And the change of the surface roughness of the firing mechanism in the salt fog environment causes the reduction of firing energy X 9 The dust environment influences the collision and friction characteristics of the firing mechanism to reduce the firing energy X 10 ；
The basic events that the firing pin structure does not match the primer include: firing pin with larger deflection fire degree X 13 The shape and the size of the head part of the striking pin are not reasonable X 14 ；
The basic events of low primer sensitivity include: bottom thickness X of primer shell 15 The center of the percussion medicine surface is lower X 16 The hardness of the bottom material of the primer shell is large X 17 The wall part of the primer has unreasonable size X 18 The mechanical properties of the primer shell, the firing pin, the cartridge case and other metal materials are influenced in the low-temperature environment, so that the deformation absorption energy of the primer shell is increased by X 19 And the specific heat capacity of the primer mixture is reduced X in a low-temperature environment 20 The low thermal conductivity of the primer under low temperature is not favorable for the formation and growth of hot spots 21 The activation energy of the primer mixture is reduced under low temperature environment, which is not beneficial to the formation and growth of hot spots 22 And the chemical reaction rate of the primer under the low-temperature environment is reduced by X 23 And the primer mix is damped X in the river water immersion environment 32 And the primer under the salt spray environment is damped by X 33 ；
The basic events that the cartridge case firing structure is defective include: the height of the fire table from the medicine surface is too low X 24 Unreasonable shape and size of the fire table 25 ；
Ignition threshold of the primer mixtureThe basic events for the improvement of the conditions include: uneven primer mix composition X 26 Base fire multi-tin foil cover sheet X 27 High medicine pressing pressure X 28 Explosive neglected loading X 29 Under low temperature environment, the ignition condition needed by ignition of the primer mixture is increased (temperature) X 30 Ignition X of primer mix seriously affected by damage of primer mix when impacted in low temperature environment 31 And the primer mix is damped X in the river water immersion environment 32 In salt fog environment, the primer mix is affected with moisture X 33 ；
The basic events for which the primer output capability and propellant ignition conditions do not match include: uneven propellant composition X 34 The propellant/propellant has less explosive loading amount X 35 Improving the critical condition of ignition of the propellant in a low-temperature environment 36 And the propellant powder is damped X in the river water immersion environment 37 And the propellant powder is affected with damp X in the salt spray environment 38 。
The misfiring/misfiring fault tree is shown in fig. 7.
2) Tree for fault without firing
The firing mechanism does not strike the primer when the hammer is not fired. The corresponding step S4 further includes:
s41, determining that the fault tree is not triggered as a top event of the fault tree;
s42, determining that the direct cause event of the unfired state is failure of a firing motion component and blocked firing motion;
s43, setting up basic events of each direct reason event, and completing the establishment of an unfired fault tree;
wherein the basic event of the failure of the firing motion component comprises the strength of the hammer spring per se is insufficient X 39 Poor fatigue resistance of hammer spring X 40 And the use frequency of the hammer spring is over X 41 ；
The basic event that the firing movement is blocked comprises that the hammer movement is interfered with other components to be blocked X 42 And the excessive dirt in the dust environment affects the movement X of the hammer 43 And the silt influences the movement X of the hammer/hammer pin under the river-soaking environment 44 。
The unfired fault tree is shown in FIG. 8.
3) Weak percussion fault tree
If the firing is weak, the firing pin strikes the primer, but the primer cannot be ignited successfully. The corresponding step S4 further includes:
s41, determining that the firing is weak as a top event of the fault tree;
s42, determining that the direct cause event of weakness of the percussion is insufficient percussion energy and insufficient ignition capacity;
s43, setting up the reason events of each direct reason event;
wherein, the cause events of insufficient firing energy are insufficient firing pin projection and insufficient firing pin energy; the cause event of insufficient ignition capability is mismatching of a firing pin structure and primer/cartridge case, low primer sensitivity and defect of a cartridge case ignition structure;
s44, setting up basic events of all reason events to complete the establishment of the weak triggering fault tree;
the basic events of the reason events are consistent with the basic events of the corresponding reason events in the misfiring/misfiring fault tree, and are not described herein again.
The firing limp-home tree is shown in FIG. 9;
4) early-firing fault tree
When the fire is early, namely abnormal firing, the primer is impacted to fire, or the primer is impacted to fire normally. The corresponding step S4 further includes:
s41, determining that the early fire is the top event of the fault tree;
s42, determining that the direct cause event of the early ignition is that the primer is impacted when abnormally fired, the sensitivity of the primer is improved, the ignition critical condition of the primer is reduced, and the ignition critical condition of the propellant is reduced;
s43, establishing basic events of each direct reason event to complete the establishment of the early ignition fault tree;
wherein the basic event that the primer is impacted when the primer is abnormally fired comprises the following steps: failure of the out-of-position safety causes premature release of the hammer X 45 Over-high mass of firing pin X 46 Over-large projected amount of firing pin X 47 Automatic machineExcessive speed X for re-advancing to place 48 Wedging X between the striking tip and the gun bolt taper hole 49 Rust of firing pin X 50 ；
The basic events of the primer sensitivity improvement include: bottom fire filling depth over-shallow X 51 X for undersize fillet at mouth part of primer chamber 52 Primer wall scratch X 53 The primer is put into the central concave bulge X of the inclined primer 54 The cartridge case and the primer are over-tightly matched by X 55 The axial dimension fit relation among the height of the cartridge case fire platform, the height of the primer powder surface and the depth of primer loading is improper X 56 And influence X on mechanical property of metal material in the firing-ignition system of the firearm under high-temperature environment 57 ；
The basic events of the primer mixture ignition threshold condition reduction include: specific heat capacity of primer mix is improved in high-temperature environment 58 The formation and growth of hot spots with too high heat conduction coefficient of the primer under high temperature environment accelerate X 59 And the activation energy of the primer under the high-temperature environment is improved 60 And the chemical reaction rate of the primer under the high-temperature environment is accelerated by X 61 ；
The basic events of the propellant ignition threshold reduction include: sensitivity improvement of propellant under high-temperature environment and reduction of X under ignition critical condition 62 。
The early fire fault tree is shown in FIG. 10;
5) breakdown fault tree of primer
The fire bottom breakdown means that after the firing pin strikes the fire bottom, the fire bottom shell is broken down to generate the smoke leakage phenomenon. The corresponding step S4 further includes:
s41, determining that the primer breaks down into a top event of the fault tree;
s42, determining that the direct cause event of the primer breakdown is that the firing energy is too large, the primer shell bearing capacity is insufficient, and the primer shell bearing pressure is too large;
s43, establishing basic events of each direct reason event, and completing the establishment of the primer breakdown fault tree;
wherein the basic event of excessive firing energy comprises: the head of the striking pin has unreasonable shape and size 14 Over-designed large projection of firing pin X 47 Wedging X between the striking tip and the gun bolt taper hole 49 Rust of firing pin X 50 The designed small X of the bullet bottom clearance 63 Over-large designed spring force of hammer 64 ；
The basic events of insufficient primer shell bearing capacity include: the intensity of the primer shell is not enough X 65 Thin X at the bottom of the primer shell 66 And influence X on mechanical property of metal material in the firing-ignition system of the firearm under high-temperature environment 57 ；
The basic event that the primer casing is subjected to overpressure includes: the primer and the primer chamber are matched and over-tightened X 55 The amount of the primer mixture is too much X 67 Unreasonable shape and size of fire table X 25 And the specific heat capacity of the primer in a high-temperature environment is increased by X 58 The thermal conductivity coefficient of the primer mixture in a high temperature environment is increased by X 59 And the activation energy of the primer mixture in a high-temperature environment is improved 60 And the chemical reaction rate of the primer under the high-temperature environment is improved 61 。
The primer breakdown fault tree is shown in fig. 11.
The invention defines a firearm firing-ignition system to clearly analyze targets, ranges and various information related to analysis; analyzing the action mechanism of firing-ignition of the firearm, wherein the action mechanism is a process of thermal, mechanical and chemical coupling; based on a gun firing-ignition action mechanism, the influence factors of gun firing-ignition faults are specifically analyzed from three aspects of design, manufacture and use; analyzing the influence relation of typical special environments such as high/low temperature, dust, river water immersion, salt mist and the like on the firing-ignition performance of the firearm; and finally, establishing a 5-gun firing-ignition system typical fault tree considering special environmental factors by applying an algorithm artificial tree building method. The general flow chart is shown in fig. 12, the invention deeply studies the firing-ignition action mechanism of the firearm and reveals that the firing-ignition action mechanism is a gun and bullet matching, thermal, mechanical and chemical coupling action process; based on the action mechanism of firing-ignition of the firearm, various influence factors causing firing-ignition faults of the firearm are comprehensively considered, particularly special environmental factors; deeply researching the influence of various factors such as structure size, material performance parameters, process parameters, special environment, the thermodynamic performance and chemical reaction performance of the primer/propellant powder on the firing-ignition performance of the firearm, and analyzing possible faults caused by the influence; support can be provided for reliability analysis and design of the firearm firing-ignition system.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.
Claims (3)
1. A method for establishing a gun firing-ignition fault tree in a special environment is characterized by comprising the following steps:
s1, defining a firearm firing-ignition system; specifically, the method comprises the following steps:
s11, determining the structural composition of a firearm firing-ignition system;
the structure of the firearm firing-ignition system comprises a firearm firing mechanism, a bullet primer, a bullet shell and propellant powder;
s12, determining the task function and the working mode formed by each structure of the firearm firing-ignition system; wherein:
the firearm firing mechanism is used for striking a bullet primer;
the bullet primer is used for igniting propellant powder;
the propellant powder is used for pushing the bullet to move in the gun barrel in an accelerated way;
the bullet shell is used for containing the propellant powder, connecting a bullet head with the bullet primer and simultaneously bearing the gas pressure of gunpowder and the acting force of a firearm automatic machine during launching;
s13, drawing a block diagram of the firearm firing-ignition system, wherein the block diagram at least comprises a functional block diagram;
s2, analyzing the action mechanism of the firearm firing-ignition system, and determining fault influence factors of the firearm firing-ignition system;
s3, determining fault influence factors of special environments on the firearm firing-ignition system, wherein the special environments comprise high/low temperature environments, dust raising environments, river soaking environments and/or salt spray environments;
when the special environment is a high/low temperature environment, the fault influence factors on the firing-ignition system of the firearm comprise:
at least one of the effects of high/low temperature on mechanical properties of a metallic material in the firearm firing-ignition system, the effects of high/low temperature on specific heat capacity of the primer, the effects of high/low temperature on thermal conductivity coefficient of the primer, the effects of high/low temperature on activation energy of the primer, the effects of high/low temperature on chemical reaction rate of the primer, the effects of low temperature on ignition conditions of the primer, and the effects of high/low temperature on ignition critical conditions of the primer;
when the special environment is a dust environment, the fault influence factors on the firing-ignition system of the firearm comprise:
the impact and friction characteristics of the dust environment on the firing mechanism of the firearm are influenced to reduce the firing energy, the dust environment causes the hammer motion to interfere with other components to be blocked, and the dust environment influences the hammer motion;
when the special environment is a river-soaking environment, the fault influence factors on the firing-ignition system of the gun comprise:
the impact and friction characteristics of the river-soaking environment on the firing mechanism of the gun are influenced to reduce firing energy, the primer is wetted in the river-soaking environment, and the river-soaking environment influences the motion of the hammer/firing pin;
when the special environment is a salt fog environment, the fault influence factors on the firing-ignition system of the firearm comprise:
the impact of the salt spray environment on the surface roughness of the firing mechanism causes at least one of reduction of firing energy, wetting of the primer under the salt spray environment and wetting of the primer under the salt spray environment;
s4, establishing the fault tree of the firearm firing-ignition system under the special environment by adopting a deduction method in combination with the fault influence factors determined by the S2 and the S3;
wherein the step S4 further includes:
s41, determining whether the misfire or the delayed misfire is the top event of the fault tree;
s42, determining the direct cause events of the misfiring/delayed firing are insufficient firing energy, insufficient ignition capacity, improvement of ignition critical conditions of the primer, and mismatching of primer output capacity and ignition conditions of the primer;
s43, setting up a reason event of the direct reason event;
wherein, the cause events of insufficient firing energy are insufficient firing pin projection and insufficient firing pin energy; the cause events of insufficient ignition capability are mismatching of a firing pin structure and primer/cartridge case, low primer sensitivity and defective cartridge case ignition structure;
the ignition critical condition of the primer is improved, the primer output capability is not matched with the ignition condition of the primer, and no causal event is set;
s44, setting basic events of all reason events, and completing the establishment of a misfire/misfire fault tree;
wherein the basic events of insufficient firing pin projection include: the bullet bottom clearance is too large, the design of a gun trigger taper hole is unreasonable, the projection amount of the firing pin is too small, the firing pin is deformed or damaged, and the arc surface of the firing pin head is flattened;
the basic events of the firing pin with insufficient energy include: the energy design value of a hammer spring is too small, the triggering energy is excessively consumed due to interference in the motion process of the hammer, the in-place safety fails to enable the hammer to be incapable of being released, the hammer spring fails, the river water immersion environment influences the collision and friction characteristics of a triggering mechanism to reduce the triggering energy, the surface roughness of the triggering mechanism is changed in the salt spray environment to reduce the triggering energy, and the dust environment influences the collision and friction characteristics of the triggering mechanism to reduce the triggering energy;
the basic events of the firing pin structure mismatch with primer/cartridge case include: the firing pin has larger deflection degree and the shape and the size of the head part of the firing pin are unreasonable;
the basic events of low primer sensitivity include: the primer shell has thick bottom, the center of the primer surface is lower, the hardness of the material at the bottom of the primer shell is high, the wall of the primer shell is unreasonable in size, the mechanical properties of the metal materials of the primer shell, the firing pin and the shell are influenced under low temperature environment, so that the deformation absorption energy of the primer shell is increased, the specific heat capacity of the primer under low temperature environment is reduced, the heat conduction coefficient of the primer under low temperature environment is too low to be beneficial to hot spot formation and growth, the activation energy of the primer under low temperature environment is reduced to be not beneficial to hot spot formation and growth, the chemical reaction rate of the primer under low temperature environment is reduced, the primer is affected with damp under river water environment, and the primer is affected with damp under salt fog environment;
the basic events that the cartridge case firing structure is defective include: the height of the fire table from the medicine surface is too low, and the shape and the size of the fire table are unreasonable;
the basic events of the primer mixture ignition critical condition increase include: the ingredients of the primer mixture are uneven, the primer is provided with a tin foil cover plate, the pressure of the primer mixture is high, the primer mixture is neglected to be filled, the ignition condition required by the ignition of the primer mixture is improved in a low-temperature environment, the primer mixture is damaged when impacted in the low-temperature environment so as to seriously influence the ignition of the primer mixture, the primer mixture is damped in a river-soaking environment, and the primer mixture is damped in a salt mist environment;
the basic events for which the primer output capability and propellant ignition conditions do not match include: the propellant has uneven components, less propellant/propellant charge, increased critical ignition conditions in low temperature environments, moisture of propellant in river water immersion environments, and moisture of propellant in salt spray environments;
alternatively, the step S4 further includes:
s41, determining that the event is not triggered as the top event of the fault tree;
s42, determining that the direct cause event of unfired is failure of a firing motion component and blocked firing motion;
s43, setting up basic events of each direct reason event, and completing the establishment of an unfired fault tree;
the basic events of the failure of the percussion motion component comprise that the strength of a hammer spring is insufficient, the fatigue resistance of the hammer spring is poor, and the use frequency of the hammer spring is excessive;
the basic events of the blocking of the percussion motion comprise that the hammer motion is blocked due to the interference with other components, the hammer motion is influenced by excessive dirt in a dust raising environment, and the hammer/hammer pin motion is influenced by silt in a river water soaking environment;
alternatively, the step S4 further includes:
s41, determining that the firing is weak as the top event of the fault tree;
s42, determining that the direct cause event of weakness of the percussion is insufficient percussion energy and insufficient ignition capacity;
s43, setting up the reason events of each direct reason event;
wherein, the cause events of insufficient firing energy are insufficient firing pin projection and insufficient firing pin energy; the cause events of insufficient ignition capability are mismatching of a firing pin structure and primer/cartridge case, low primer sensitivity and defective cartridge case ignition structure;
s44, setting up basic events of all reason events to complete the establishment of the weak triggering fault tree;
wherein the basic events of insufficient firing pin projection include: the bullet bottom clearance is too large, the design of a gun trigger taper hole is unreasonable, the projection amount of the firing pin is too small, the firing pin is deformed or damaged, and the arc surface of the firing pin head is flattened;
the basic events of the firing pin energy shortage include: the energy design value of a hammer spring is too small, the triggering energy is excessively consumed due to interference in the motion process of the hammer, the in-place safety fails to enable the hammer to be incapable of being released, the hammer spring fails, the river water immersion environment influences the collision and friction characteristics of a triggering mechanism to reduce the triggering energy, the surface roughness of the triggering mechanism is changed in the salt spray environment to reduce the triggering energy, and the dust environment influences the collision and friction characteristics of the triggering mechanism to reduce the triggering energy;
the basic events of the firing pin structure mismatch with primer/cartridge case include: the firing pin has larger deflection degree and the shape and the size of the head part of the firing pin are unreasonable;
the basic events of low primer sensitivity include: the primer shell has thick bottom, lower center of the primer surface, high hardness of the primer shell bottom material, unreasonable primer shell wall thickness and influenced mechanical properties of the primer shell, the firing pin and the cartridge shell in a low-temperature environment, so that the primer shell deforms, the absorbed energy is increased, the specific heat capacity of the primer in the low-temperature environment is reduced, the heat conduction coefficient of the primer in the low-temperature environment is not beneficial to the formation and growth of excessively low hot spots, the activation energy of the primer in the low-temperature environment is reduced, the formation and growth of the hot spots are not beneficial, the chemical reaction rate of the primer in the low-temperature environment is reduced, the primer in a river-soaking environment is damped, and the primer in a salt mist environment is damped;
the basic events of the cartridge case firing structure defect include: the height of the fire table from the medicine surface is too low, and the shape and the size of the fire table are unreasonable;
alternatively, the step S4 further includes:
s41, determining that early fire is a top event of the fault tree;
s42, determining that the direct cause event of the early ignition is that the primer is impacted when abnormally fired, the sensitivity of the primer is improved, the ignition critical condition of the primer is reduced, and the ignition critical condition of the propellant is reduced;
s43, establishing basic events of each direct reason event to complete the establishment of the early ignition fault tree;
wherein the basic event that the primer is impacted when the primer is abnormally fired comprises the following steps: the failure of the safety is not in place, which causes the driving hammer to be released in advance, the quality of the driving pin to be overlarge, the projecting amount of the driving pin to be designed to be overlarge, the automatic machine to be moved back to the place to be fast to be overlarge, the driving pin point and the cone hole of the gun machine to be wedged tightly, and the driving pin to be rusted;
the basic events of the primer sensitivity improvement include: the depth of primer loading is too shallow, the fillet of the opening part of a primer chamber is too small, the wall part of the primer is scratched, the primer is loaded into the center of an inclined primer to be sunken and raised, the match between a cartridge case and the primer is too tight, the height of a cartridge case fire platform, the height of the primer powder surface and the depth of primer loading are improper in axial dimension fit relation, and the influence on the mechanical property of a metal material in the firing-ignition system of the firearm is caused in a high-temperature environment;
the basic events of the primer mixture ignition threshold condition reduction include: the specific heat capacity of the primer mixture is improved in a high-temperature environment, the formation and growth of hot spots with an excessively large heat conduction coefficient of the primer mixture are accelerated in the high-temperature environment, the activation energy of the primer mixture is improved in the high-temperature environment, and the chemical reaction rate of the primer mixture is accelerated in the high-temperature environment;
the basic events of the reduction of critical conditions for propellant ignition include: the sensitivity is improved under the high-temperature environment, the ignition critical condition of the propellant is reduced;
alternatively, the step S4 further includes:
s41, determining that the primer breaks down into a top event of the fault tree;
s42, determining that the direct cause event of the primer breakdown is that the firing energy is too large, the primer shell bearing capacity is insufficient, and the primer shell bearing pressure is too large;
s43, establishing basic events of all direct cause events, and completing the establishment of a primer breakdown fault tree;
wherein the basic event of excessive firing energy comprises: the shape and the size of the head part of the striking pin are unreasonable, the projection amount of the striking pin is designed to be overlarge, the striking pin point and a cone hole of a gunlock are wedged tightly, the striking pin is rusted, the clearance of the bullet bottom is designed to be undersized, and the spring force of the striking hammer is designed to be overlarge;
the basic events of insufficient primer shell bearing capacity include: the intensity of the primer shell is not enough, the bottom of the primer shell is thin, and the influence on the mechanical property of a metal material in the firing-ignition system of the firearm is realized in a high-temperature environment;
the basic event that the primer shell is subjected to overpressure comprises the following steps: the primer and the primer chamber are too tightly matched, the amount of the primer is too much, the shape and the size of the fire table are unreasonable, the specific heat capacity of the primer under the high-temperature environment is increased, the heat conduction coefficient of the primer under the high-temperature environment is increased, the activation energy of the primer under the high-temperature environment is improved, and the chemical reaction rate of the primer under the high-temperature environment is improved.
2. The method for building the gun firing-firing fault tree under the special environment as claimed in claim 1, wherein:
in the step S11, the firearm firing mechanism includes a hammer, a hammer spring guide rod, a firing pin, a retainer ring, a recoil spring seat ring, a bolt, and a socket;
the bullet primer comprises a primer shell, a primer and a tin foil cover plate;
the bullet shell, the bullet primer, the propellant powder and the bullet head jointly form a bullet;
in the step S13, the functional block diagram includes a hammer spring, a hammer spring guide, a hammer, a striker, a bolt, a primer case, a fire deck, a primer, a fire transfer hole, a propellant powder, a cartridge case of a bullet, and a bullet.
3. The method for building a gun firing-firing fault tree under special circumstances as claimed in claim 2, wherein said step S2 specifically includes:
analyzing the action mechanism of the firearm firing-ignition system by combining the functional block diagram of the firearm firing-ignition system, and respectively determining the following factors:
s21, determining factors which do not strike primer due to the movement of the firing mechanism, including design and manufacture factors and use factors;
the design and manufacture factors comprise at least one of insufficient strength of the hammering spring, poor fatigue resistance of the hammering spring, and jamming caused by interference of hammering movement and other components;
the using factors comprise at least one of the influence of excessive use times of the hammer spring and excessive dirt on the hammer movement;
s22, determining factors which influence the action of a firing mechanism of the firearm so as to influence the energy of the firing pin striking the primer, wherein the factors comprise design and manufacture factors and use factors;
the design manufacturing factors include: at least one of the bullet bottom clearance, the gunlock taper hole, the projection amount of the firing pin, the energy of the hammer spring and the interference existing in the motion process of the hammer;
the use factors include: at least one of the deformation or damage of the firing pin, the flattening of the arc surface of the head of the firing pin and the failure of the in-place safety mechanism leads the hammer not to be released and the failure of the hammer spring;
s23, determining design and manufacture factors which influence the impact dynamic performance of the firing pin primer cartridge case system so as to influence the firing energy transfer and the efficiency of converting the firing energy into ignition energy;
the fire primer is characterized by comprising at least one of the shape and the size of a head part of a firing needle, the center position of a firing powder surface, the degree of deflection of a firing needle, the hardness of a bottom material of a primer shell, the thickness of the primer shell bottom, the height of a fire table from the firing powder surface, the shape and the size of the fire table, the filling depth of primer, small fillet of a mouth part of a primer chamber, scarification of the primer wall part, filling of primer into an inclined primer central concave and convex part, over-tight matching of a cartridge case and the primer, improper axial size matching relation among the height of the cartridge case fire table, the height of the primer powder surface and the filling depth of the primer and insufficient strength of the primer shell;
s24, determining design and manufacture factors influencing ignition critical conditions of the primer mixture;
comprises at least one of uneven ingredients of the primer mixture, multiple packs of tinfoil cover plates, high pressure of pressing the primer mixture and neglected packing of the primer mixture;
s25, determining design and manufacturing factors influencing the ability of the primer output flame to ignite the propellant powder;
comprises at least one of uneven propellant powder components and propellant powder/propellant powder loading amount;
s26, determining influence factors of the primer which is impacted under the abnormal firing condition to cause early firing, wherein the influence factors comprise design and manufacture factors and use factors;
the design manufacturing factors include: at least one of premature release of the hammer, excessive mass of the firing pin, excessive projection of the firing pin, excessive re-entering speed of the automatic machine, and wedging between the firing pin tip and the conical hole of the gun bolt due to failure of the in-place safety mechanism;
the factors of use include shot pin rust death.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110289007.XA CN113048837B (en) | 2021-03-08 | 2021-03-08 | Method for establishing gun firing-ignition fault tree in special environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110289007.XA CN113048837B (en) | 2021-03-08 | 2021-03-08 | Method for establishing gun firing-ignition fault tree in special environment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113048837A CN113048837A (en) | 2021-06-29 |
| CN113048837B true CN113048837B (en) | 2022-09-23 |
Family
ID=76513444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110289007.XA Active CN113048837B (en) | 2021-03-08 | 2021-03-08 | Method for establishing gun firing-ignition fault tree in special environment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113048837B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114459280B (en) * | 2022-03-17 | 2024-01-05 | 中北大学 | Test evaluation method for influence of special environmental factors on firing energy of firearm |
| CN114838617B (en) * | 2022-03-22 | 2024-01-23 | 中北大学 | Test evaluation method and device for output performance of firearm firing ignition system |
| CN114963852B (en) * | 2022-06-01 | 2023-06-30 | 南京理工大学 | Automatic firearm testing device |
| CN115371490A (en) * | 2022-08-24 | 2022-11-22 | 中国人民解放军陆军工程大学 | General comprehensive electronic information system data acquisition equipment for self-propelled artillery |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101441053A (en) * | 2007-12-19 | 2009-05-27 | 王智勇 | Intelligent correcting device of shooting environmental parameter |
| CN105069320A (en) * | 2015-09-16 | 2015-11-18 | 辽宁工程技术大学 | Method for analyzing factor combination importance degree and factor importance degree of discrete space fault tree |
| CN106123677A (en) * | 2016-08-09 | 2016-11-16 | 中国人民解放军军械工程学院 | Antiaircraft gun automaton fault diagnosis experiment platform |
| CN106247848A (en) * | 2016-07-26 | 2016-12-21 | 中北大学 | A kind of complexity is automatically for the Incipient Fault Diagnosis method of defeated bullet system |
| CN111854520A (en) * | 2020-08-07 | 2020-10-30 | 中国人民武装警察部队警官学院 | Firearm fault detection and ammunition counting device |
| CN112085356A (en) * | 2020-08-26 | 2020-12-15 | 中国人民解放军63856部队 | Light weapon test identification method based on simulation technology |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6785996B2 (en) * | 2001-05-24 | 2004-09-07 | R.A. Brands, Llc | Firearm orientation and drop sensor system |
-
2021
- 2021-03-08 CN CN202110289007.XA patent/CN113048837B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101441053A (en) * | 2007-12-19 | 2009-05-27 | 王智勇 | Intelligent correcting device of shooting environmental parameter |
| CN105069320A (en) * | 2015-09-16 | 2015-11-18 | 辽宁工程技术大学 | Method for analyzing factor combination importance degree and factor importance degree of discrete space fault tree |
| CN106247848A (en) * | 2016-07-26 | 2016-12-21 | 中北大学 | A kind of complexity is automatically for the Incipient Fault Diagnosis method of defeated bullet system |
| CN106123677A (en) * | 2016-08-09 | 2016-11-16 | 中国人民解放军军械工程学院 | Antiaircraft gun automaton fault diagnosis experiment platform |
| CN111854520A (en) * | 2020-08-07 | 2020-10-30 | 中国人民武装警察部队警官学院 | Firearm fault detection and ammunition counting device |
| CN112085356A (en) * | 2020-08-26 | 2020-12-15 | 中国人民解放军63856部队 | Light weapon test identification method based on simulation technology |
Non-Patent Citations (1)
| Title |
|---|
| "某自动步枪典型故障可靠性分析及研究";曹炜;《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》;20190115(第01期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113048837A (en) | 2021-06-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113048837B (en) | Method for establishing gun firing-ignition fault tree in special environment | |
| US7841279B2 (en) | Delayed extraction and a firearm cartridge case | |
| US7165496B2 (en) | Piston head cartridge for a firearm | |
| BE1016266A5 (en) | Mitigation device for rebound automatic firearms. | |
| RU2204110C2 (en) | Firearm | |
| US5983772A (en) | Subcaliber device/blank firing adaptor for blowback or recoil operated weapons | |
| US7658138B2 (en) | Practice barrels for use with practice cartridges | |
| CA2559098A1 (en) | Safety mechanism for a rifle | |
| US3728937A (en) | Gas fired caseless ammunition rifle | |
| US20070144393A1 (en) | Caseless ammunition with internal propellant | |
| RU2717112C1 (en) | Firearm with barrel forward stroke | |
| US20070137085A1 (en) | Safety cartridge | |
| CN100404208C (en) | Nailing tool of continuous nailing | |
| CN110398176B (en) | Anti-reloading device for mortar | |
| Miller | Ballistics of 17th Century muskets | |
| Birkett et al. | Understanding ballistics a primer for courts | |
| WO2010041985A3 (en) | Dynamic firearm | |
| US908294A (en) | Firearm. | |
| US11619458B2 (en) | Pressure controlled inertia system for automatic fire weapons | |
| US11859931B2 (en) | Automatically adjustable cartridge size firearm | |
| US4532866A (en) | Combustible safety primer of selective percussion for case-less ammunition or ammunition with combustible case | |
| US9546840B1 (en) | Bi-directional recoil containment and double strike prevention system | |
| Das et al. | Science and Engineering of Small Arms | |
| RU3032U1 (en) | CARTRIDGE FOR HUNTING GUNS | |
| US1036171A (en) | Means for preventing the erosion of guns. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |