CN102840798B - Method of testing vibration response time of artillery structure under shooting condition - Google Patents
Method of testing vibration response time of artillery structure under shooting condition Download PDFInfo
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- CN102840798B CN102840798B CN201210303279.1A CN201210303279A CN102840798B CN 102840798 B CN102840798 B CN 102840798B CN 201210303279 A CN201210303279 A CN 201210303279A CN 102840798 B CN102840798 B CN 102840798B
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Abstract
The invention discloses a method for testing the vibration response time of an artillery structure under the shooting condition, comprising the following steps: (1) acquiring vibration response signals: testing the vibration displacement and the vibration acceleration of different components of an artillery by a laser displacement sensor and an acceleration sensor, and testing the moment when the bullet is fired out of the opening of the artillery synchronously by a high-speed camera; and (2) judging time: judging the appearance sequence of the vibration displacement and acceleration response signals of different components of the artillery relative to the high-speed photographing time according to the vibration displacement and acceleration testing results by taking the high-speed photographing time as a reference so as to determine whether the chassis of the artillery is started or not at the moment. The invention clarifies the wrong idea that people for many years thinks that the chassis of the artillery can not move at the moment when the bullet is fired out of the opening of the artillery, points out a right direction for the artillery shooting intensity error source analysis and has epoch-making significance to diagnosing the shooting intensity fault and reducing the frequency of blindly making key technological breakthrough in shooting intensity and correcting measures.
Description
Technical field
The present invention relates to a kind of shooting operating mode cannon structural vibration response time test method, specifically, the present invention relates to the cannon structural vibration response time test method of a kind of large caliber gun in the time of the closeness firing test of ground.
Background technology
Cannon weapon, in development process, all will carry out dispersion (namely firing density) performance test.Large caliber gun often carries out maximum range ground closeness firing test.Namely artillery shooting ground closeness of bullet ground dispersion, it is the dense degree of one group of dispersion around centre of dispersion, being the key war skill index of cannon weapon system to targeting usefulness, is also the important foundation performance parameter of cannon weapon system effectiveness and fighting efficiency.Under modernization new and high technology condition, the aggravation resisting on modernization artilleryman battlefield, the closeness tool of cannon weapon system is of great significance.Obviously, artillery bombardment accurately, accurately and rapidly annihilating target is the basic demand to modern artillery weapon system.At present, along with the variation of war mode, the target that cannon tackles, its speed is more and more faster.Improve the effect of injuring of cannon, improving its firing density is one of Major Technology reaching this target.At the Future Positions of target travel, launch intensive bullet or fragment, attack moving target with this.Therefore, compared with the past, modern battlefield is more outstanding to the requirement of cannon weapon system firing density, and the theory and technology of cannon weapon system firing density all improves in countries in the world weapons development departments and use department in research.
One of the modern war of in the high-tech requirement to cannon weapon is exactly high accuracy, Far Range, high maneuverability.In order to improve gun reach, people will take guided cartridge, increase gun pressure and lengthen the measures such as barrel.The lengthening of barrel and the increase of gun pressure, directly effect is that cannon structural dynamic characteristics worsens, gun muzzle vibratory response significantly increases, firing density hydraulic performance decline.In order to launch intensive shell within a short period of time, people seek to improve the method for cannon firing rate.After cannon firing rate improves, gun vibration aggravation, is restricting again the further raising of cannon firing density performance.Because vibratory response is the principal element that affects artillery shooting closeness, it becomes primary factor sometimes.The realization of high maneuverability, inevitable requirement cannon weapon is lightweight.Weight of gun and artillery shooting closeness are the conflicts of symbiosis always, and generally, weight of gun is light, and its firing density is with regard to variation.
In the development process of cannon weapon system, firing density problem is perplexing the fast development of cannon armament systems always, firing density index often can not reach war skill index request, need organizational technology's tackling key problem, so not only increased research fund but also spun out the lead time, these are one of bottleneck problems of restriction cannon weapon development.Therefore, research firing density problem, to promoting the fast development of China's cannon weapon science and technology, significantly improves cannon weapon performance and has decisive significance.
Firing density has formed fire accuracy together with the accuracy of fire, and firing density is random error, be many kinds of parameters minor variations cause in advance cannot be definite error, and the accuracy of fire is systematic error, can revise.If firing density level is high or dispersion is little, solve the accuracy of fire just easily, the systematic error of generation is also easily revised.If firing density level is very low, be just not easy to judge position, center of impact, be not easy update the system error.Therefore, firing density is the basis of the accuracy of fire.
Affect artillery shooting closeness factor varied, sum up, mainly contain the inside and outside trajectory factor of cannon, cannon structural factor etc.At present, exploitation cannon, according to the difference of combat duty, general emphasis concentrates in the distortion of cannon structure, as multi-form in towed cannon, crawler type cannon, vehicular cannon, wheeled cannon etc.Perfect through improvement for many years, the inside and outside ballistic performance of cannon is basicly stable, and when novel cannon model development, its inside and outside trajectory parameter directly adopts, and does not generally change or revises.The practice of cannon Development Engineering and theory analysis for many years show, the cannon that adopts service ammunition to develop, and its firing density performance is mainly subject to the impact of gun muzzle vibratory response size.
Along with the quick variation of modern war form, self-propelled gun has become the cannon weapon that main military power of the world gives priority to.Self-propelled gun structure is generally made up of rise and fall part, rotating part and chassis portion etc.Barrel is the rise and fall critical piece of part of cannon, and barrel is gun muzzle foremost.Cannon engineering practice and theoretical analysis result for many years show, while adopting service ammunition, gun muzzle vibratory response is the primary factor that affect artillery shooting closeness, and cannon structure difference parts are to gun muzzle vibratory response influence degree difference.People think in cannon model development process for many years always, and due to large caliber gun chassis, not only quality is large, and away from gun muzzle, therefore thinks, bullet goes out gun muzzle moment, and chassis does not have vibratory response.In other words, because the Projectile Motion in Bore time is very of short duration, only have tens milliseconds, within the so of short duration time, the exciting force that cannon thorax inner high voltage, high speed and high-temperature fuel gas stream cause can not pass on chassis structure, naturally, bullet goes out gun muzzle moment, and chassis does not just have vibratory response yet.
Because people are subject to the impact of above-mentioned viewpoint, in the time that large caliber gun model is developed, especially, in the time of the tackling problems in key technologies of artillery shooting closeness, always chassis influence factor is foreclosed, think that bullet goes out gun muzzle moment, do not move in chassis.In fact, chassis structure dynamic characteristic has material impact to gun muzzle vibration and firing density.But up to the present, due to the restriction of tested person technology, people also do not find and judge that bullet goes out the method whether move on gun muzzle moment chassis, and not motion viewpoint of chassis will mislead cannon method of production, sometimes may make the tackling problems in key technologies of artillery shooting closeness go in the wrong direction.Therefore,, in the urgent need to the different component vibration response time method of testings of large caliber gun, tackle key problems and indicate correct direction for cannon development and closeness.
Summary of the invention
In order to verify that whether not motion viewpoint of chassis is correct, the present invention proposes the different component vibration response time method of testings of a kind of cannon.The inventive method is with two kinds of vibratory response sensors such as displacement and acceleration and be divided into two steps enforcements.The first step, vibration response signal obtains.With laser displacement sensor and the acceleration transducer test different component vibration displacements of cannon and vibration acceleration, go out the time in gun muzzle moment with high-speed photography synchronism detection bullet; Second step, time judgement.According to vibration displacement and acceleration test result, taking the high-speed photography testing time as benchmark, judge that whether the different component vibration displacements of cannon and vibration acceleration response signal, with respect to the order that the high-speed photography time occurs, go out gun muzzle moment setting in motion to provide cannon chassis at bullet.All sensors will be selected same operation principle and same model, the error of bringing to eliminate test macro.
Carry out first step vibration response signal while obtaining, vibratory response parts are elected artillery recoil part, rotating part and chassis as.Before test vibration response, first fixation of sensor.When artillery recoil part recoil displacement measurement, the probe of laser displacement sensor is fixed on to reel cage upper surface, fixes a reflecting plate at breech upper surface.Artillery shooting, there is recoil with respect to reel cage and enters to move with multiple in breech.During Projectile Motion in Bore, there is relative displacement with respect to probe in the reflecting plate on breech, and this displacement has just represented recoil part recoil displacement, and the moment that displacement curve initial change point in recoil occurs just represents recoil componental movement zero hour.
When rotating part displacement measurement, the probe of laser displacement sensor is fixed on rotating part, fixes a reflecting plate at chassis upper surface.During Projectile Motion in Bore, probe on rotating part is with respect to the reflecting plate generation relative displacement of chassis upper surface, this displacement has just represented the rotation displacement of rotating part with respect to chassis, and the moment that the initial change point of rotation displacement curve occurs just represents that rotating part moves the zero hour.
When chassis displacement measurement, select two sub-units that there is relative motion trend on chassis as tested object, the probe of laser displacement sensor is fixed on a sub-unit, on another sub-unit, fixes a reflecting plate, or utilize intrinsic plane on these parts as reflecting plate.During Projectile Motion in Bore, on chassis, between two sub-units, relative displacement can occur, this displacement has just represented the moving situation on chassis, and the moment that the initial change point of displacement curve occurs just represents bobbin movement zero hour.
On reel cage, rotating part and chassis, correct position is fixed an acceleration transducer, record the acceleration vibratory response amount of these parts during Projectile Motion in Bore with this, the moment that the initial change point of accelerating curve occurs just represents these parts acceleration responsives zero hours.
On the ground of cannon side, arrange a high-speed figure video camera, alignment lens gun muzzle, records bullet with this and goes out gun muzzle moment.Record with same data acquisition module the bullet that whole displacement signals, acceleration signal and high-speed figure video camera obtain simultaneously go out gun muzzle moment time graph.Also can record bullet with photoelectricity timer and go out gun muzzle time.
Carry out the second step time while judging, whole displacement curves obtained above, accelerating curve and high-speed photography time graph are deployed on same screen, all test curves have same time coordinate system, to mutually compare.First, playback High Speed Photography Images, finds out bullet and goes out gun muzzle time.Then, the time graph obtaining taking high-speed photography is benchmark, show that bullet goes out gun muzzle moment on high-speed photography time graph, and show that whole displacement curves and accelerating curve start the initial time changing.If this initial time occurs in before bullet goes out gun muzzle moment, represent that bullet goes out before gun muzzle, corresponding component has moved or has had vibratory response; Otherwise, if this initial time occurs in after bullet goes out gun muzzle moment, representing that bullet goes out before gun muzzle, corresponding component does not move or there is no vibratory response.
Shooting operating mode cannon structural vibration response time test method has remarkable advantage.It has found the different parts of the same door of a kind of test cannon vibratory response initial time sequential grammar under shooting operating mode, can provide its vibratory response initial time order, whether move reliable experimental test foundation is provided for bullet goes out the different parts of gun muzzle moment cannon, especially gone out gun muzzle moment for bullet and judge whether cannon chassis has moved and will provide accurate test data.It goes out by clarifying the intrinsic bullet of people for many years the incorrect viewpoint that gun muzzle moment large caliber gun chassis does not move, for artillery shooting closeness Analysis of error source indicates correct direction, it reduces blindness to firing density fault diagnosis, firing density tackling problems in key technologies amendment measure and is with historically new significance.
Brief description of the drawings
Fig. 1 is shooting operating mode cannon structural vibration response time test method schematic diagram;
Fig. 2 is artillery recoil part recoil displacement measurement schematic diagram;
Fig. 3 is rotating part displacement measurement schematic diagram;
Fig. 4 is chassis displacement measurement schematic diagram;
Fig. 5 is test principle block diagram;
Fig. 6 is displacement time history test curve schematic diagram;
Fig. 7 is acceleration time history test curve schematic diagram.
Detailed description of the invention
The explanation embodiment of the present invention concrete grammar as an example of vehicular heavy caliber self-propelled gun example.The inventive method is divided into two steps, the first step, and vibration response signal obtains.With laser displacement sensor and the acceleration transducer test different component vibration displacements of cannon and vibration acceleration, go out the time in gun muzzle moment with high-speed photography synchronism detection bullet, also can adopt other principle displacement transducer to replace laser displacement sensor; Second step, time judgement.According to vibration displacement and acceleration test result, taking the high-speed photography testing time as benchmark, judge that whether the different component vibration displacements of cannon and vibration acceleration response signal, with respect to the order that the high-speed photography time occurs, go out gun muzzle moment setting in motion to provide cannon chassis at bullet.All sensors will be selected same operation principle and same model, the error of bringing to eliminate test macro.
As shown in Figure 1, vehicular heavy caliber self-propelled gun is mainly divided into three large parts, and part, rotating part and chassis portion rise and fall.Gun muzzle 2, barrel 3, and the formation cannon such as breech 16 and reel cage 17 in Fig. 2 part of rising and falling, wherein, gun muzzle 2, barrel 3, breech 16 grades are called again artillery recoil part, and when artillery shooting, it recoil occurs and enter again rectilinear motion with respect to reel cage 17, go out gun muzzle moment at bullet, artillery recoil part is along reel cage 17 guide rail recoil certain distances.The part of rising and falling, added 14, and the added side plate 18 shown in Fig. 3 etc. forms cannon rotating part, wherein, added 14 can relatively rotate around rotary middle spindle (being vertical axis) with respect to car body 15, during Projectile Motion in Bore, added 14 have the trend of relative motion with respect to car body 15.Added side plate 18 is parts of added 14, between them, is connected.Spade 9 and car body 15 etc. form chassis, and spade 9 comprises hydraulic mechanism, and it comprises the hydraulic cylinder 19 shown in Fig. 4 and piston 20 thereof, and during Projectile Motion in Bore, hydraulic cylinder 19 has the trend of relative motion with respect to piston 20.Dotted line in Fig. 2, Fig. 3 and Fig. 4 represents laser optical path.
Carry out first step vibration response signal while obtaining, vibratory response parts are elected artillery recoil part, rotating part and chassis as.Before test vibration response, first fixation of sensor.As shown in Figure 2, when the displacement measurement of artillery recoil part recoil, the probe of laser displacement sensor 5 is fixed on to reel cage 17 upper surfaces, fixes a reflecting plate 7 at breech 16 upper surfaces.Artillery shooting, there is recoil with respect to reel cage 17 and enters to move with multiple in breech 16.During Projectile Motion in Bore, there are relative displacements with respect to probe 5 in the reflecting plate 7 on breech 16, and this displacement has just represented recoil part recoil displacement, and the moment that displacement curve initial change point in recoil occurs just represents recoil componental movement zero hour.
As shown in Figure 3, when rotating part displacement measurement, the probe of laser displacement sensor 13 is fixed on rotating part, is namely fixed on added side plate 18, at chassis upper surface, namely fix a reflecting plate 12 at car body 15 upper surfaces.During Projectile Motion in Bore, there is relative displacement with respect to the reflecting plate 12 of chassis upper surface in the probe 13 on rotating part, this displacement has just represented the rotation displacement of rotating part with respect to chassis, and the moment that the initial change point of rotation displacement curve occurs just represents that rotating part moves the zero hour.
When chassis displacement measurement, select two sub-units that there is relative motion on chassis as tested object, select hydraulic cylinder 19 and hydraulic piston 20 in spade mechanism, the probe of laser displacement sensor 10 is fixed on hydraulic piston 20, on hydraulic cylinder 19, fix a reflecting plate 11, or utilize hydraulic cylinder 19 end faces as reflecting plate.During Projectile Motion in Bore, in spade, between hydraulic cylinder 19 and hydraulic piston 20, relative displacement can occur, this displacement has just represented the moving situation on chassis, and the moment that the initial change point of displacement curve occurs just represents bobbin movement zero hour.
On reel cage 17, correct position is fixed an acceleration transducer 4, fix an acceleration transducer 6 at rotating part correct position, on chassis, correct position is fixed an acceleration transducer 8, record the acceleration vibratory response amount of these parts during Projectile Motion in Bore with this, the moment that the initial change point of accelerating curve occurs just represents these parts acceleration responsives zero hours.
On the ground of cannon side, arrange a high-speed figure video camera 1, alignment lens gun muzzle 2, records bullet with this and goes out gun muzzle moment.Record with same data acquisition module the bullet that whole displacement signals, acceleration signal and high-speed figure video camera obtain simultaneously go out gun muzzle moment time graph.Also can record bullet with photoelectricity timer and go out gun muzzle time.
Carry out the second step time while judging, whole displacement curves obtained above, accelerating curve and high-speed photography time graph are deployed on same screen.First, playback High Speed Photography Images, finds out bullet and goes out gun muzzle time.Then the time graph x, obtaining with high-speed photography
0for benchmark, on high-speed photography time graph, show that bullet goes out gun muzzle moment t
0, and show that whole displacement curves and accelerating curve start the initial time changing.Shown in Fig. 5, Fig. 6 and Fig. 7, artillery shooting obtains recoil displacement x simultaneously
1, rotary displacement x
2, chassis displacement x
3, reel cage acceleration a
1, added acceleration a
2, chassis acceleration a
3, bullet goes out gun muzzle time x
0equal time response curve in same data acquisition module, is deployed under same time coordinate system these curve, so that contrast mutually above-mentioned whole curve records time response.Draw the initial corresponding time in variation moment of each test curve amplitude, namely, t
3it is chassis displacement x
3the initial variation moment, and t
1, t
2, t
4, t
5, t
6with t
3similar, in Fig. 6, if this initial time occurs in before bullet goes out gun muzzle moment, represent that bullet goes out before gun muzzle, corresponding component has moved or has had vibratory response; For example, t
3< t
0, represent chassis displacement x
3the initial variation moment occur in before bullet goes out gun muzzle moment, bullet goes out before gun muzzle, move in chassis; Otherwise, if this initial time occurs in after bullet goes out gun muzzle moment, representing that bullet goes out before gun muzzle, corresponding component does not move or there is no vibratory response.In Fig. 6 and Fig. 7,
represent time coordinate axle,
with
represent respectively displacement coordinate axle and acceleration reference axis.
Claims (1)
1. one kind based on shooting operating mode cannon structural vibration response time test method, relate to data acquisition module, laser displacement sensor and acceleration transducer, is characterized in that: be divided into two steps based on shooting operating mode cannon structural vibration response time test method, the first step, vibration response signal obtains; With laser displacement sensor and the acceleration transducer test different component vibration displacements of cannon and vibration acceleration, go out the time in gun muzzle moment with high-speed photography synchronism detection bullet; Second step, time judgement; According to vibration displacement and acceleration test result, taking the high-speed photography testing time as benchmark, judge that whether the different component vibration displacements of cannon and vibration acceleration response signal, with respect to the order that the high-speed photography time occurs, go out gun muzzle moment setting in motion to provide cannon chassis at bullet; All sensors will be selected same operation principle and same model, the error of bringing to eliminate test macro; Vehicular heavy caliber self-propelled gun is mainly divided into rise and fall part, rotating part and the large parts of chassis portion three; Gun muzzle [2], barrel [3], breech [16] and reel cage [17] form the cannon part of rising and falling; Gun muzzle [2], barrel [3], breech [16] is called artillery recoil part; When artillery shooting, there is recoil and enter rectilinear motion again in it, goes out gun muzzle moment at bullet with respect to reel cage [17], and artillery recoil part is along reel cage [17] guide rail recoil certain distance; The part of rising and falling, added [14], added side plate [18] forms cannon rotating part, added [14] can relatively rotate around rotary middle spindle with respect to car body [15], rotary middle spindle is generally in vertical state, during Projectile Motion in Bore, added [14] have the trend of relative motion with respect to car body [15]; Added side plate [18] is the part of added [14], between them, is connected; Spade [9] and car body [15] form chassis, and spade [9] comprises hydraulic cylinder [19] and piston [20] thereof, and during Projectile Motion in Bore, hydraulic cylinder [19] has the trend of relative motion with respect to piston [20]; Carry out first step vibration response signal while obtaining, vibratory response parts are elected artillery recoil part, rotating part and chassis as; Before test vibration response, first fixation of sensor; When artillery recoil part recoil displacement measurement, the probe of laser displacement sensor [5] is fixed on to reel cage [17] upper surface, fixes a reflecting plate [7] at breech [16] upper surface; Artillery shooting, there is recoil with respect to reel cage [17] and enter to move with multiple in breech [16]; During Projectile Motion in Bore, there is relative displacement with respect to probe [5] in the reflecting plate [7] on breech [16], and this displacement has just represented recoil part recoil displacement, and the moment that displacement curve initial change point in recoil occurs just represents recoil componental movement zero hour; When rotating part displacement measurement, the probe of laser displacement sensor [13] is fixed on to added side plate [18] upper, fixes a reflecting plate [12] at car body [15] upper surface; During Projectile Motion in Bore, there is relative displacement with respect to the reflecting plate [12] of chassis upper surface in the probe [13] on rotating part, this displacement has just represented the rotation displacement of rotating part with respect to chassis, and the moment that the initial change point of rotation displacement curve occurs just represents that rotating part moves the zero hour; When chassis displacement measurement, select hydraulic cylinder [19] in spade mechanism and hydraulic piston [20] as tested object, the probe of laser displacement sensor [10] is fixed on to hydraulic piston [20] and goes up, on hydraulic cylinder [19], fix a reflecting plate [11]; During Projectile Motion in Bore, between hydraulic cylinder in spade [19] and hydraulic piston [20], relative displacement can occur, this displacement has just represented the moving situation on chassis, and the moment that the initial change point of displacement curve occurs just represents bobbin movement zero hour; Fix a reel cage acceleration transducer [4] at the upper correct position of reel cage [17], fix an added acceleration transducer [6] at rotating part correct position, on chassis, correct position is fixed a chassis acceleration transducer [8], record the acceleration vibratory response amount of these parts during Projectile Motion in Bore with this, the moment that the initial change point of accelerating curve occurs just represents these parts acceleration responsives zero hours; On the ground of cannon side, arrange a high-speed figure video camera [1], alignment lens gun muzzle [2], records bullet with this and goes out gun muzzle moment; Record with same data acquisition module the bullet that whole displacement signals, acceleration signal and high-speed figure video camera obtain simultaneously go out gun muzzle moment time graph; Carry out the second step time while judging, whole displacement curves obtained above, accelerating curve and high-speed photography time graph are deployed on same screen; First, playback High Speed Photography Images, finds out bullet and goes out gun muzzle time; Then the time graph x, obtaining with high-speed photography
0for benchmark, on high-speed photography time graph, show that bullet goes out gun muzzle moment t
0, and show that whole displacement curves and accelerating curve start the initial time changing; Artillery shooting obtains recoil displacement x simultaneously
1, rotary displacement x
2, chassis displacement x
3, reel cage acceleration a
1, added acceleration a
2, chassis acceleration a
3, bullet goes out gun muzzle time x
0time response, curve in same data acquisition module, was deployed under same time coordinate system these curve, so that contrast mutually above-mentioned whole curve records time response; Draw the initial corresponding time in variation moment of each test curve amplitude, if this initial time occurs in before bullet goes out gun muzzle moment, represent that bullet goes out before gun muzzle, corresponding component moves; t
3< t
0, represent chassis displacement x
3the initial variation moment occur in before bullet goes out gun muzzle moment, bullet goes out before gun muzzle, move in chassis; Otherwise, if this initial time occurs in after bullet goes out gun muzzle moment, representing that bullet goes out before gun muzzle, corresponding component does not move.
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| CN103499249B (en) * | 2013-09-11 | 2015-06-24 | 中国船舶重工集团公司第七一〇研究所 | Automatic-gain rotary projectile revolution number calculating method |
| CN103499248B (en) * | 2013-09-11 | 2015-06-10 | 中国船舶重工集团公司第七一〇研究所 | High-speed rotating projectile rotation number counting circuit |
| CN106126825B (en) * | 2016-06-27 | 2019-03-08 | 中国人民解放军装甲兵工程学院 | Weapon station gun muzzle disturbance optimization method based on Kriging algorithm |
| CN106767548B (en) * | 2017-03-08 | 2023-07-25 | 长春理工大学 | Device and method for detecting directivity of gun barrel in shooting state by using space three-coordinate method |
| CN109059642A (en) * | 2018-01-11 | 2018-12-21 | 王富云 | Primary and secondary hinge structure cannon |
| CN111521062B (en) * | 2020-04-29 | 2021-04-27 | 中国特种飞行器研究所 | Test method for simulating influence of cannonball launching recoil on stability of patrol boat |
| CN113781522B (en) * | 2021-08-25 | 2023-10-24 | 西安交通大学 | Method for measuring gun barrel vibration under shooting working condition based on computer vision |
| CN114152141B (en) * | 2021-12-23 | 2023-05-12 | 西安昆仑工业（集团）有限责任公司 | Traction gun positioning and orienting support stabilizing device |
| CN116592816B (en) * | 2023-07-18 | 2023-09-29 | 中国人民解放军海军工程大学 | Data acquisition method, device, equipment and storage medium based on rotating mechanism |
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| CN2498598Y (en) * | 2000-12-01 | 2002-07-03 | 王宝元 | Determiner for rotating inertia of gun turret |
| CN2819163Y (en) * | 2005-08-04 | 2006-09-20 | 北京凯瑞德图像技术有限责任公司 | Stabilized precisioning comprehensive tester of cannon system |
| CN102243133A (en) * | 2011-04-02 | 2011-11-16 | 中北大学 | High-speed automaton fault diagnosis method based on movement patterns and impact signal analysis |
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| SG101963A1 (en) * | 2001-03-14 | 2004-02-27 | Ordnance Dev And Engineering C | Mobile artillery system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2498598Y (en) * | 2000-12-01 | 2002-07-03 | 王宝元 | Determiner for rotating inertia of gun turret |
| CN2819163Y (en) * | 2005-08-04 | 2006-09-20 | 北京凯瑞德图像技术有限责任公司 | Stabilized precisioning comprehensive tester of cannon system |
| CN102243133A (en) * | 2011-04-02 | 2011-11-16 | 中北大学 | High-speed automaton fault diagnosis method based on movement patterns and impact signal analysis |
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