CN108153974B - Underwater vehicle access fault positioning resistance calculation method - Google Patents

Underwater vehicle access fault positioning resistance calculation method Download PDF

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CN108153974B
CN108153974B CN201711419197.2A CN201711419197A CN108153974B CN 108153974 B CN108153974 B CN 108153974B CN 201711419197 A CN201711419197 A CN 201711419197A CN 108153974 B CN108153974 B CN 108153974B
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resistance
resistor
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CN108153974A (en
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吴斌
王凯国
拓勇
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No705 Research Institute Of China Shipbuilding Industry Corp
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    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/30—Circuit design
    • G06F30/36—Circuit design at the analogue level
    • G06F30/367—Design verification, e.g. using simulation, simulation program with integrated circuit emphasis [SPICE], direct methods or relaxation methods
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/10—Geometric CAD
    • G06F30/15—Vehicle, aircraft or watercraft design

Abstract

The invention provides a method for calculating a fault location resistance of an underwater vehicle access, which relates to the field of underwater vehicles, and comprises the steps of designing a system access fault location resistance topology through an analysis system, obtaining an actual calculation model according to the system resistance topology, and calculating equivalent resistances in all possible states; the minimum value of the resistance difference between the equivalent resistances in any two states is calculated by comparing the equivalent resistances in different components and safety plug installation combination states under the same resistance combination, and then the corresponding resistance value can be obtained. The method can rapidly work out the resistance value of the path resistor which can meet the use requirement, can accurately position the product communication fault position in the use process, provides technical support for the abnormal state investigation and positioning and reliable test of the underwater vehicle, and is used in related technical models at present.

Description

Underwater vehicle access fault positioning resistance calculation method
Technical Field
The invention relates to the field of underwater vehicles, in particular to a fault location calculation method.
Background
In the process of assembling and debugging the underwater vehicle, product access faults often occur, the problem is small, the underwater vehicle is assembled and disassembled blindly for many times, precious time is wasted, and the test task is failed greatly. Aiming at the situation, in the design process of a multi-type underwater vehicle, the design of simple path fault positioning is adopted, but a path fault positioning resistance method is not adopted in certain models, so that the problems that whether the whole product is abnormal or not can be confirmed, and the specific position of a fault cannot be accurately positioned exist; some models adopt a path fault positioning resistor design, but a complete resistor calculation method is not provided, and a matching trying method is mostly adopted, so that precious design time is wasted, and no reference significance is brought to subsequent project design.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention designs a detailed method for calculating the path fault location resistance aiming at an underwater vehicle adopting the path fault location resistance, and the method is suitable for designing all the underwater vehicles using the path fault location resistance.
The technical scheme adopted by the invention for solving the technical problem comprises the following specific steps:
step 1: analyzing system composition, and designing a system access fault positioning resistor topology;
in the resistance topology design, an underwater vehicle system is assumed to be composed of n cabin segments and n safety plugs, and parallel resistors R are arranged at the joints of the cabin segments 2 to n and the previous cabin segment1～Rn-1In each cabin section, a series resistor is arranged at the opposite plug end of the safety plug, namely the system path fault resistor topology is the series-parallel connection of a plurality of resistors, and a path fault resistor topology graph is obtained, wherein r1～rnIf there are several safety plugs in a cabin section, r is the equivalent resistance of the corresponding safety plug groupnCan be subdivided into rn1、rn2、…rnmWherein m refers to the number of the installation plugs in the cabin section, and if the cabin section has no safety plugs, the equivalent resistance is 0;
step 2: obtaining an actual calculation model according to the system resistance topology, and calculating equivalent resistances in all possible states;
in each section, each mounting assembly c1～cnThe resistor is installed in a resistor topological model in a series connection mode, the equivalent resistance value is 0 or infinity, namely when the installation state of the component is normal, the equivalent resistance is 0, and if the installation state of the component is abnormal, the equivalent resistance is infinity; each safety plug d1～dnThe equivalent resistor is arranged in a resistor topology model in a parallel connection mode, namely in each cabin section, the equivalent resistor of the safety plug is connected with the path fault positioning resistor in the safety socket at the opposite plug end in parallel, and the resistance value of the equivalent resistor is 0 or infinity, namely the safety plugWhen the equivalent resistance of the head is normal, the equivalent resistance is 0, and if the equivalent resistance of the safety plug is abnormal, the equivalent resistance is infinity, so that the system test equivalent resistance formula is obtained as follows:
R＝(((((cn+rn//dn)//Rn-1+cn-1+rn-1//dn-1)//Rn-2+cn-2+rn-2//dn-2)//Rn-2+…c3+r3//d3)//R2+c2+r2//d2)//R1+c1+r1//d1 (1)
in the formula (1), R is the final equivalent resistance, R1～Rn-1And r1～rnIndicating system path fault location resistance, c1～cnThe equivalent resistance represents the installation state of the components in the cabin section, and the value of the equivalent resistance is 0 or infinity; d1～dnAn equivalent resistance representing a safety plug mounting state, the value of which is 0 or ∞; "/" indicates that the resistors are in parallel;
and step 3: firstly, determining a packaging form of a path fault positioning resistor, and formulating a resistor gear array according to standard resistor gears; and then sequentially substituting the resistance shift array into the formula (1) for calculation, comparing equivalent resistances of different components and safety plug installation combination states under the same resistance combination, calculating to obtain the minimum value of the resistance difference value between the equivalent resistances in any two states, and recording the minimum value as CminThen, the minimum difference C between the equivalent resistances of two states under different resistance combinations is calculatedminWherein the minimum difference C is obtained for different combinations of resistancesminAnd the resistance combination corresponding to the maximum time is the finally obtained resistance value.
In the step 2, if m safety plugs are contained in the cabin section n, r is addednIs subdivided into rn1、rn2…rnmAnd r in the formula (1)nIs changed to rn1+rn2+…+rnmAnd (6) performing calculation.
The method has the advantages that the resistance value of the path resistor which can meet the use requirement can be rapidly worked out, the product communication fault position can be accurately positioned in the use process, and the technical support is provided for the abnormal state investigation and positioning and the reliable test of the underwater vehicle.
Drawings
Fig. 1 is a structural composition diagram of a general system.
FIG. 2 is a diagram of a general system path fault location resistor.
FIG. 3 is a diagram illustrating an equivalent resistance test of a general system.
Fig. 4 is a structural composition diagram of the underwater vehicle.
Fig. 5 is a schematic diagram of a path fault locating resistor of the underwater vehicle.
Fig. 6 is a schematic diagram of an equivalent resistance test of the underwater vehicle.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
The invention combines an underwater vehicle under research to calculate the path fault positioning resistance, and FIG. 1 is a structural composition diagram of a general system. FIG. 2 is a diagram of a general system path fault location resistor. FIG. 3 is a diagram illustrating an equivalent resistance test of a general system.
The specific steps of the embodiment are as follows:
step 1: the structural composition of the embodiment is shown in fig. 4, there are 2 safety plugs, the safety plugs 1 and 2 are in the installation state during work and in the non-installation state during test, and the topology of the connected fault locating resistor is shown in fig. 5 according to the structure shown in fig. 4, wherein R is1～R5The resistors are all arranged in the cabin end face connector, r1And r2In the cabin safety socket (safety plug to plug end), the connectivity resistance of each component is in series state in each cabin, the model to outer connectivity resistance test point is at E, F point, according to the testability requirement, R1～R5The resistance values of the resistors are different.
Step 2: calculating model equivalent resistance according to the model resistance topology, simulating the installation state of components in a product by combining the connected fault positioning resistance topology in the figure 5, obtaining a model test topology as shown in figure 6, and calculating an equivalent resistance R calculation formula at the E, F end as follows:
R＝((((R5∥c6+r2∥d2+c5)∥R4+r1∥d1+c4)∥R3+c3)∥R2+c2)∥R1+c1
in the formula: r1～R5And r1～r2Locating a resistor for a type of path fault; c. C1～c6Respectively representing the equivalent resistance of the installation state of the products of the sections 1 to 6 of the cabin of the model, and the value is 0 or infinity; d1～d2Respectively representing the equivalent resistance of the installation state of the safety plug 1 and the safety plug 2 of the model, and the value is 0 or infinity; "/" indicates parallel connection of the resistors.
Substituting the corresponding resistance c when confirming all the connection states1～c6，d1～d2(0 or ∞), calculating the formula of all the states of the model as shown in table 1:
TABLE 1 Total State connectivity resistance mapping Table
Figure BDA0001522628780000031
Figure BDA0001522628780000041
In the formula, the abnormity can be positioned to the cabin section in any state, and when the difference value between any two states is larger than the sum of the allowed errors of the two states, different states can be distinguished, so that the state positioning is realized, and the communication state of the cabin section component is positioned.
And step 3: and (3) adopting MATLAB to complete the resistance calculation of the path resistor, wherein the calculation steps are as follows:
step 3.1: and establishing a pass fault positioning resistor gear.
In this embodiment, when the via fault locating resistor is designed, the resistor is fixed inside the cable. The resistance value of the fault locating resistor is preliminarily determined to be selected from the following resistor grades according to the E24 resistor standard by adopting a direct insertion type resistor, and if the obtained result cannot meet the test requirement, the resistor grade is expanded.
R＝[1000；10000；11000；13000；1400；14000；1500；15000；1600；1800；2000；2300；2500；3300；3900；4200；4400；4700；5100；5600；6200；7300；7500；930；8200；9400]。
The resistor is the resistance value in the E24 standard of the direct-plug-type resistor, because the calculation time is considered, part of the commonly used K-grade resistance value is adopted initially, all resistor gears are not completely covered, if the requirement cannot be met, the resistor gear array is expanded, and the above resistor units are all omega.
Step 3.2: calculating to obtain the minimum value of the resistance difference between the equivalent resistances of any two states, and recording the minimum value as CminThen, the minimum difference C between the equivalent resistances of two states under different resistance combinations is calculatedminWherein the minimum difference C is obtained for different combinations of resistancesminAnd the resistance combination corresponding to the maximum time is the finally obtained resistance value.
This embodiment sets the variable R1～R5、r1、r2Sequentially substituting the value of the R array into the variable R1～R5、r1、r2In which R is1～R5It should be different from the above, and the maximum value of the minimum difference between different states under the same group of resistor combinations is calculated according to the formula in table 1.
The minimum difference C is obtainedminThe maximum resistance combination is the path fault locating resistance of the invention.
By the above steps, C between any two states of the present embodiment is calculatedmaxAt 175.1317 Ω, the corresponding path fault location resistance is: r1＝14000Ω，R2＝15000Ω，R3＝13000Ω，R4＝11000Ω，R5＝1400Ω，r1＝r2＝2300Ω。
The resistance combination calculation shows that when the resistance difference between the two states is 175.1317 omega at the minimum, the equivalent resistance between the two states is about 3k omega, when the path fault positioning resistance adopts 5 per thousand grades, the maximum error between the two states is about 30 omega (3k omega multiplied by 5 per thousand multiplied by 2), and the theoretical difference value is smaller than 175.1317 omega, so that the use requirement of a system can be met, and the resistance grade extension and the repeated calculation are not carried out.

Claims (2)

1. A method for calculating a fault location resistance of an underwater vehicle access is characterized by comprising the following steps:
step 1: analyzing system composition, and designing a system access fault positioning resistor topology;
in the resistance topology design, an underwater vehicle system is assumed to be composed of n cabin segments and n safety plugs, and parallel resistors R are arranged at the joints of the cabin segments 2 to n and the previous cabin segment1～Rn-1In each cabin section, a series resistor is arranged at the opposite plug end of the safety plug, namely the system path fault resistor topology is the series-parallel connection of a plurality of resistors, and a path fault resistor topology graph is obtained, wherein r1～rnIf there are several safety plugs in a cabin section, r is the equivalent resistance of the corresponding safety plug groupnCan be subdivided into rn1、rn2、…rnmWherein m refers to the number of the installation plugs in the cabin section, and if the cabin section has no safety plugs, the equivalent resistance is 0;
step 2: obtaining an actual calculation model according to the system resistance topology, and calculating equivalent resistances in all possible states;
in each section, each mounting assembly c1～cnThe resistor is installed in a resistor topological model in a series connection mode, the equivalent resistance value is 0 or infinity, namely when the installation state of the component is normal, the equivalent resistance is 0, and if the installation state of the component is abnormal, the equivalent resistance is infinity; each safety plug d1～dnThe safety plug is installed in a resistor topology model in a parallel connection mode, namely in each cabin, the equivalent resistor of the safety plug is connected with the path fault locating resistor in the plug-in end safety socket in parallel, the resistance value of the equivalent resistor is 0 or infinity, namely when the equivalent resistor of the safety plug is normal, the equivalent resistor is 0, and if the equivalent resistor of the safety plug is abnormal, the equivalent resistor is infinity, so that the safety plug is obtainedThe system test equivalent resistance formula is as follows:
R＝(((((cn+rn//dn)//Rn-1+cn-1+rn-1//dn-1)//Rn-2+cn-2+rn-2//dn-2)//Rn-2+…c3+r3//d3)//R2+c2+r2//d2)//R1+c1+r1//d1 (1)
in the formula (1), R is the final equivalent resistance, R1～Rn-1And r1～rnIndicating system path fault location resistance, c1～cnThe equivalent resistance represents the installation state of the components in the cabin section, and the value of the equivalent resistance is 0 or infinity; d1～dnAn equivalent resistance representing a safety plug mounting state, the value of which is 0 or ∞; "/" indicates that the resistors are in parallel;
and step 3: firstly, determining a packaging form of a path fault positioning resistor, and formulating a resistor level array according to an E24 resistor standard level; and then sequentially substituting the resistance shift array into the formula (1) for calculation, comparing equivalent resistances of different components and safety plug installation combination states under the same resistance combination, calculating to obtain the minimum value of the resistance difference value between the equivalent resistances in any two states, and recording the minimum value as CminThen, the minimum difference C between the equivalent resistances of two states under different resistance combinations is calculatedminWherein the minimum difference C is obtained for different combinations of resistancesminAnd the resistance combination corresponding to the maximum time is the finally obtained resistance value.
2. The method for calculating the underwater vehicle access fault location resistance according to claim 1, wherein:
in the step 2, if m safety plugs are contained in the cabin section n, r is addednIs subdivided into rn1、rn2…rnmAnd r in the formula (1)nIs changed to rn1+rn2+…+rnmAnd (6) performing calculation.
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