CN106291328A - A kind of spacecraft switch matrix fault detect and positioner - Google Patents
A kind of spacecraft switch matrix fault detect and positioner Download PDFInfo
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- CN106291328A CN106291328A CN201610738491.9A CN201610738491A CN106291328A CN 106291328 A CN106291328 A CN 106291328A CN 201610738491 A CN201610738491 A CN 201610738491A CN 106291328 A CN106291328 A CN 106291328A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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Abstract
The open a kind of spacecraft switch matrix fault detect of the present invention and positioner, including self-test vector signal generating unit, more than one group self-test isolated location and more than one group self-test state signal generating unit；Self-test vector signal generating unit generates and respectively switchs test vector be delivered to switch matrix one to one in switch matrix, controls corresponding switch conduction or shutoff；Often group self-test isolated location is arranged between the adjacent two-stage switch of switch matrix, each road signal between often adjacent two-stage is switched by group self-test isolated location is isolated, and carries out closing behind road by the signal after isolation and flow to corresponding self-test state signal generating unit；Self-test state signal generating unit receives closes road signal, and obtain self-test status signal after the level state conversion of involutory road signal, according to the self-test status signal under each test vector, the fault of switch matrix being detected and positioned, the present invention can carry out switch fault detection and location in the case of not affecting on-off circuit work.
Description
Technical field
The invention belongs to spacecraft composite elctronics technical field, be specifically related to a kind of spacecraft switch matrix fault detect and
Positioner.
Background technology
On-off control is the circuit ingredient that spacecraft is important, and usual spacecraft on-off control uses relay or MOS
Pipes etc. realize, but either relay or metal-oxide-semiconductor all exist certain failure of removal pattern, therefore to strengthen design can
By property, typically the design of serial or parallel connection can be used to form the ON-OFF control circuit that relay or metal-oxide-semiconductor realize and hold
Close matrix, strengthen the reliability of ON-OFF control circuit design with this.In addition to understand the duty of ON-OFF control circuit, need
The state of each way switch in ON-OFF control circuit is detected, in traditional switch working state detection method, generally
It is to use hall device or the mode of quantity of state and remote measurement amount of arranging in ON-OFF control circuit to sentence in on-off circuit
Disconnected on-off circuit work is the most working properly, but the volume that takies of hall device and area are big, and weight is also big, for a small amount of
The detection of electric switch circuit duty still can, but for the on-off circuit in substantial amounts of switch matrix, need to use substantial amounts of
Hall device, will cause the rising of deisgn product weight and volume, is unfavorable for the optimization of design, and sets in ON-OFF control circuit
The mode of configuration state amount and remote measurement amount needs each way switch to be respectively provided with an independent state or remote measurement amount, thus takies a large amount of
Telemetry-acquisition passage, this cannot receive for design resource limited on spacecraft, no matter uses Hall simultaneously
Device still arranges the mode of quantity of state in ON-OFF control circuit also can only reflect ON-OFF control circuit to a certain extent
Duty, it is impossible to occur point to position the switch fault in ON-OFF control circuit, this to the isolation of Spacecraft malfunction and
Recover to bring difficulty.
Summary of the invention
In view of this, the invention provides a kind of spacecraft switch matrix fault detect and positioner, it is possible at not shadow
In the case of ringing on-off circuit work, switch fault is detected and localization of fault.
Realize technical scheme as follows:
A kind of spacecraft switch matrix fault detect and positioner, including self-test vector signal generating unit, more than one group
Self-test isolated location and the self-test state signal generating unit of more than a group；Self-test isolated location generates with self-test state
Unit one_to_one corresponding；
Described self-test vector signal generating unit respectively switchs one to one that test vector is also for generating in switch matrix
Being delivered to switch matrix, described test vector controls the on or off in switch matrix to inductive switch；
Often group self-test isolated location is arranged between the adjacent two-stage switch of switch matrix, described self-test isolated location
Including self-test isolation module a and self-test isolation module b, described self-test state signal generating unit includes that self-test state generates
Module a and self-test state generation module b；Wherein, upper level switch during self-test isolation module a is arranged on adjacent two-stage switch
And between user load, self-test isolation module b is arranged in adjacent two-stage switch between next stage switch and user load, from
Test isolation module a each road signal that upper level switchs between user load in switching adjacent two-stage is isolated,
And flow to corresponding self-test state generation module a after the signal after isolation is combined into a road；Self-test isolation module b
In switching adjacent two-stage, each road signal between next stage switch and user load is isolated, and by the letter after isolation
Corresponding self-test state generation module b is flowed to after number being combined into a road；
Self-test state generation module a is received from the signal of test isolation module a conveying, and turns the level state of signal
Obtain self-test status signal a, self-test state generation module b after changing and be received from the signal of test isolation module b conveying, and right
Signal level state conversion after obtain self-test status signal b, according to the self-test status signal a under each test vector and from
The fault of switch matrix is detected and positions by test mode signal b；
During fault detect, under the control of test vector, carry out all switches respectively all turning on, all off, each
Level all turn on successively, the most all off operation at different levels, under each operation according to obtain self-test status signal a and test oneself
Whether the switches at different levels in switch matrix are existed the state of examination status signal b short circuit or open circuit fault detects；
If kth level in n level switch matrix (there is short trouble in k ∈ (1, n), n > 1) switch, then by 1～k-1 level and
K+1～n level switch all Guan Bis, by all off for k level switch, record self-test status signal a now and self-test state
Signal b, disconnects successively by k+1～n level parallel relationship switch afterwards, and operation ensures that an only road paralleling switch is in disconnection every time
State, and as k=n, the operation to k+1～n level switch is substituted by 1～k-1 level switching manipulation, and operation is according to testing oneself every time
Examination status signal a and self-test status signal b respectively with k level switch all off time record self-test status signal a and from
Whether test mode signal b compares to change and judges whether this road k level switch exists short trouble, if any one state becomes
Change, illustrate to there is short trouble；
If kth level in n level switch matrix (there is open circuit fault in k ∈ (1, n), n > 1) switch, then by 1～k-1 level and
K+1～n level switch all Guan Bis, by all off for k level switch, record self-test status signal a now and self-test state
Signal b, closes successively by kth level switch afterwards, is disconnected successively by k+1～n level parallel relationship switch simultaneously, operates guarantee every time
The k level switch of only one road paralleling switch is in Guan Bi, k+1～n level switch is in disconnection, and as k=n, to k+1～n level
The operation of switch is substituted by 1～k-1 level switching manipulation, and operation is believed according to self-test status signal a and self-test state every time
Whether change compared with the self-test status signal a and self-test status signal b of record when number b is all off with k level switch respectively
Judge whether this road k level switch exists open circuit fault, if state is the most unchanged, illustrate to there is open circuit fault.
Further, to switch conduction and shutoff when described self-test vector signal generating unit normally works according to switch matrix
Control mode generate test vector.
Further, described self-test isolation module a and self-test isolation module b by diode, audion, optocoupler or
Magnetic coupling realizes the isolation of signal.
Further, in described self-test isolation module a, adjacent two-stage switch in upper level switch with user load it
Jian Ge road signal realizes the isolation of signal by connecting the diode of more than one series connection respectively, and the signal after isolation is combined into one
Road also exports, and all diodes in self-test isolation module a are in the same direction；In self-test isolation module b, user load is with adjacent
In two-stage switch, each road signal between next stage switch realizes signal by connecting the diode of more than one series connection respectively
Isolation, the signal after isolation is combined into a road and exports, and all diodes in self-test isolation module b are in the same direction；Self-test is isolated
The diode of module a is in opposite direction with the diode of self-test isolation module b.
Further, described self-test isolation module a and self-test isolation module b all utilizes optocoupler by single for self-test isolation
The signal of unit's output is converted into photoelectric current, i.e. generates self-test status signal.
Beneficial effect:
(1) this fault detect and positioner compensate for cannot being accurately positioned in on-off circuit the defect of abort situation,
Switch matrix circuit adds self-test isolated location and self-test state signal generating unit, it is only necessary to the least circuit overhead is i.e.
The fault detect to switches all in circuit matrix and location can be completed, it is simple to design realizes and design optimization, can be to switch
Short circuit and open circuit fault carry out detecting and position the position that fault occurs.
(2) when the on-off control needed for the test vector in this fault detect and positioner normally works with switch matrix
Required on-off control mode is consistent, simplifies the design of test vector, and can be real by the design of simple test vector
Now comprehensive test coverage.
(3) the self-test isolated location of this fault detect and positioner uses diode to realize signal isolation features, no
The arrangement design expending diode in electric energy, and self-test isolation module a and self-test isolation module b combines self-test state
The self-test status signal of generation module a and self-test state generation module b can accurately detect investigation be out of order type and
There is position.
(4) the self-test isolated location of this fault detect and positioner realized by the diode that two or more is connected right
The isolation of each path switching signal, strengthens the reliability of self-test isolated location.
(5) operating current of the self-test state signal generating unit (i.e. optocoupler) of this fault detect and positioner is only a few milli
Peace, almost can ignore compared with the operating current of switch matrix, so during switch matrix breaker in middle normal circuit operation,
Apparatus of the present invention will not produce any impact to on-off circuit.
(6) this fault detect and positioner can be accurately positioned the position broken down, and isolation and recovery for fault carry
Supplied technical foundation, compare tradition extensive style master backup switching mode, can only the on-off circuit broken down be carried out every
From and recover, improve the utilization ratio of circuit.
Accompanying drawing explanation
Fig. 1 is switch matrix fault detect of the present invention and positioner theory of constitution figure.
Fig. 2 is switch matrix fault detect of the present invention and positioner embodiment schematic diagram.
Detailed description of the invention
Develop simultaneously embodiment below in conjunction with the accompanying drawings, describes the present invention.
As it is shown in figure 1, the invention provides a kind of spacecraft switch matrix fault detect and positioner, including self-test
Vector signal generating unit, the self-test isolated location of more than a group and the self-test state signal generating unit of more than a group；Self-test every
From unit and self-test state signal generating unit one_to_one corresponding；
Described self-test vector signal generating unit respectively switchs one to one that test vector is also for generating in switch matrix
Being delivered to switch matrix, described test vector controls the on or off in switch matrix to inductive switch；Described test vector is only
Independent switch is turned on or turns off control.When described self-test vector signal generating unit normally can work with switch matrix
Switch control unit unification, its test vector control switch conducting with shutoff control mode normally work with switch matrix
Time consistent with the control mode of shutoff to switch conduction, in the case of not increasing circuit overhead, realize the self-test of switch matrix
Function, in self-test vector signal generating unit output test vector signal to switch matrix, enters each way switch in switch matrix
Row on or off operates.
Often group self-test isolated location is arranged between the adjacent two-stage switch of switch matrix, and arbitrary neighborhood two-stage switch
Between be provided with user load, described self-test isolated location includes self-test isolation module a and self-test isolation module b,
Described self-test state signal generating unit includes self-test state generation module a and self-test state generation module b；Wherein, test oneself
Examination isolation module a is arranged in adjacent two-stage switch between upper level switch and user load, and self-test isolation module b is arranged on
In adjacent two-stage switch between next stage switch and user load, self-test isolation module a is in switching adjacent two-stage
One-level switch with user load between each road signal isolate, and will isolation after signal be combined into a road after flow to and it
Corresponding self-test state generation module a；Self-test isolation module b is next stage switch and user in switching adjacent two-stage
Each road signal between load is isolated, and will isolation after signal be combined into a road after flow to corresponding self-test shape
State generation module b.
Described self-test isolation module a and self-test isolation module b is realized by diode, audion, optocoupler or magnetic coupling
The isolation of signal.
In described self-test isolation module a, in adjacent two-stage switch, upper level switchs each road between user load
Signal realizes the isolation of signal by connecting diode of more than one series connection respectively, and the signal after isolation is combined into a road defeated
Going out, all diodes in self-test isolation module a are in the same direction；In self-test isolation module b, user load is opened with adjacent two-stage
Each road signal between the next stage switch of the Central Shanxi Plain realizes the isolation of signal by connecting the diode of more than one series connection respectively, every
Signal after from is combined into a road and exports, and all diodes in self-test isolation module b are in the same direction；Self-test isolation module a's
Diode is in opposite direction with the diode of self-test isolation module b.
Along with the on or off of switches different in switch matrix is controlled by test vector, switch matrix Zhong Ge road signal
Also can on or off therewith, self-test isolated location is to the conducting of path switching signal each in switch matrix and the signal of shutoff
State is isolated, and signal after isolation is combined into a road, if only having a switch, the most described switch matrix in switch matrix
Fault detect and positioner can not comprise self-test isolation circuit.
Connection in series-parallel relation according to switch matrix breaker in middle, can comprise in a switch matrix fault detect and positioner
1 or many group self-test isolated location and self-test state signal generating unit, by the state of the self-test status signal of multiple generations
And each switch fault in switch matrix is detected and positions by relation each other.For in parallel in switch matrix
The switch of relation, i.e. shares one group of self-test isolated location and one group of self-test state signal generating unit with the switch of one-level, for
The switch of series relationship in switch matrix, is i.e. in switch the most at the same level, needs the switch for series connection to arrange independent self-test
Isolated location and self-test state signal generating unit.
Self-test state generation module a is received from the signal of test isolation module a conveying, and turns the level state of signal
Obtain self-test status signal a, self-test state generation module b after changing and be received from the signal of test isolation module b conveying, and right
Signal level state conversion after obtain self-test status signal b, according to the self-test status signal a under each test vector and from
The fault of switch matrix is detected and positions by test mode signal b.Described self-test isolation module a and self-test isolation mode
Block b all utilizes optocoupler that the signal that self-test isolated location exports is converted into photoelectric current, i.e. generates self-test status signal.
Self-test status signal is generated for the signal after closing road and can reduce described self-test state signal generating unit greatly
The expense of middle circuit.To the conducting of switch matrix breaker in middle and turn off control according to test vector, produce corresponding self-test
State, each test vector all can produce a self-test state, by the collection of self-test state and judgement, in conjunction with being grasped
The test vector made, it is judged that whether this way switch breaks down, it is judged that after, continue the execution of next test vector, directly
Complete position is all detected to by switches all in switch matrix.
During fault detect, under the control of test vector, carry out all switches respectively all turning on, all off, each
Level all turn on successively, the most all off operation at different levels, under each operation according to obtain self-test status signal a and test oneself
Whether the switches at different levels in switch matrix are existed the state of examination status signal b short circuit or open circuit fault detects；
If kth level in n level switch matrix (there is short trouble in k ∈ (1, n), n > 1) switch, then by 1～k-1 level and
K+1～n level switch all Guan Bis, by all off for k level switch, record self-test status signal a now and self-test state
Signal b, disconnects successively by k+1～n level parallel relationship switch afterwards, and operation ensures that an only road paralleling switch is in disconnection every time
State, and as k=n, the operation to k+1～n level switch is substituted by 1～k-1 level switching manipulation, and operation is according to testing oneself every time
Examination status signal a and self-test status signal b respectively with k level switch all off time record self-test status signal a and from
Whether test mode signal b compares to change and judges whether this road k level switch exists short trouble, if any one state becomes
Change, illustrate to there is short trouble；
If kth level in n level switch matrix (there is open circuit fault in k ∈ (1, n), n > 1) switch, then by 1～k-1 level and
K+1～n level switch all Guan Bis, by all off for k level switch, record self-test status signal a now and self-test state
Signal b, closes successively by kth level switch afterwards, is disconnected successively by k+1～n level parallel relationship switch simultaneously, operates guarantee every time
The k level switch of only one road paralleling switch is in Guan Bi, k+1～n level switch is in disconnection, and as k=n, to k+1～n level
The operation of switch is substituted by 1～k-1 level switching manipulation, and operation is believed according to self-test status signal a and self-test state every time
Whether change compared with the self-test status signal a and self-test status signal b of record when number b is all off with k level switch respectively
Judge whether this road k level switch exists open circuit fault, if state is the most unchanged, illustrate to there is open circuit fault.
The specific embodiment of the present invention is as follows:
As in figure 2 it is shown, total 2n switch in switch matrix, wherein n switchs for one-level, and n is 2 grades of switches, at 1 grade
Being user load between switch and 2 grades of switches, this switch matrix typically can be applicable in the power driving circuit of spacecraft,
It is wherein series relationship between 1 grade of switch matrix Zhong Mei road switch and 2 grades of switches, is 1 grade of switch and 2 grades of switches for this
Between 1 self-test isolated location and self-test state signal generating unit are set, wherein test oneself in isolated location self-test isolation
Unit a is between user load circuit and 1 grade of switch, and all diodes in self-test isolation module a are in the same direction and diode
Negative pole is connected with switching signal；Test oneself isolated location b user load circuit and 2 grades switch between, self-test isolation module b
In all diodes in the same direction and diode cathode is connected with switching signal, the self-test state in self-test state signal generating unit
Signal generating unit a is being tested oneself between isolated location a and state generation power supply, and state of testing oneself signal generating unit b is positioned at self-test isolation
Between unit b and power supply ground.Self-test vector signal generating unit can use processor or FPGA design to realize, and tests oneself in order to produce
Examination vector carries out on or off control to the switch in switch matrix, and self-test isolated location uses diode design to realize,
Isolated between path switching signal each in switch matrix by the one-way conduction characteristic of diode, in order to strengthen self-test every
From the reliability of unit, realize the isolation to switching signal by the diode of two series connection, and the switch for series relationship sets
Put independent self-test isolated location, deliver to self-test state simultaneously after carrying out closing road by the switching signal after isolation and generate single
Unit, self-test state signal generating unit generates the self-test status signal of corresponding level according to closing the switching signal behind road, and will be from
Test mode signal delivers to self-test vector signal generating unit, by self-test vector signal generating unit according to self-test status signal and
Whether test vector comes with the presence of switch fault in comprehensive descision switch matrix, and concrete enforcement step is as described below.
(1) fault detect
As in figure 2 it is shown, all 1 grade of switches in switch matrix and 2 grades of switches are set to Guan Bi all off, whole,
Switches at different levels the most all close, the most all off state of switch at different levels, according to self-test state signal generating unit produce from
Test mode signal carries out initial decision to the switch fault state in switch matrix, specific as follows:
A 1 grade of switch and 2 grades of switches are placed in all off state by ()
I. self-test generates state is ' 00 ': representing 1 grade of switch and there is short trouble, 2 grades of switches exist short trouble, and
1 grade of switch is positioned at 2 grades of switch faults does not go the same way；
Ii. self-test generates state is ' 01 ': represents 1 grade of switch and there is short trouble, and 2 grades of switches are normal；
Iii. self-test generates state is ' 10 ': representing 1 grade of switch normal, 2 grades of switches exist short trouble；
Iv. self-test generates state is ' 11 ': normal condition；
B 1 grade of switch and 2 grades of switches are placed in whole closure state by ()
I. self-test generates state is ' 00 ': representing 1 grade of switch and there is open circuit fault, 2 grades of switches exist open circuit fault, and
1 grade of switch is positioned at 2 grades of switch faults does not go the same way；
Ii. self-test generates state is ' 01 ': representing 1 grade of switch normal, 2 grades of switches exist open circuit fault；
Iii. self-test generates state is ' 10 ': represents 1 grade of switch and there is open circuit fault, and 2 grades of switches are normal；
Iv. self-test generates state is ' 11 ': normal condition；
C 1 grade of switch is placed in all off state by (), 2 grades of switches are placed in whole closure state
I. self-test generates state is ' 00 ': representing 1 grade of switch and there is short trouble, 2 grades of switches exist open circuit fault, and
1 grade of switch is positioned at same road, for multiple failure with 2 grades of switch faults；
Ii. self-test generates state is ' 01 ': represents 1 grade of switch and all there is short trouble, and 2 grades exist open circuit event
Hinder, or 1 grade of switch exists short trouble, and 2 grades of switches all exist open circuit fault；
Iii. self-test generates state is ' 10 ': normal condition；
Iv. self-test generates state is ' 11 ': represents 1 grade of switch and all there is short trouble, or 2 grades of switches all exist
Open circuit fault；
D 1 grade of switch is placed in whole closure state by (), 2 grades of switches are placed in all off state
I. self-test generates state is ' 00 ': representing 1 grade of switch and there is open circuit fault, 2 grades of switches exist short trouble, and
1 grade of switch is positioned at same road, for multiple failure with 2 grades of switch faults；
Ii. self-test generates state is ' 01 ': normal condition；
Iii. self-test generates state is ' 10 ': represents 1 grade of switch and all there is open circuit fault, and 2 grades exist short circuit event
Hinder, or 1 grade of switch exists open circuit fault, and 2 grades of switches all exist short trouble；
Iv. self-test generates state is ' 11 ': represents 1 grade of switch and all there is open circuit fault, or 2 grades of switches all exist
Short trouble.
(2) fault location
According to the fault type detected by fault detect, realize the open circuit at different levels and each way switch and short circuit respectively
Fault location, specific as follows:
(a) 1 grade of switch short fault location
I., 1 grade of switch is placed in all off state, and 2 grades of switches are placed in whole closure state, and self-test generates state and is
‘10’；
Ii. 2 grades of switches are turned off successively (ensureing that operation only 2 grades of 1 tunnel switch is off state) every time, works as self-test
When generation state becomes ' 00 ', illustrate that 1 grade of this road switch exists short trouble；
(b) 2 grades of switch short fault location
I., 2 grades of switches are placed in all off state, and 1 grade of switch is placed in whole closure state, and self-test generates state and is
‘01’；
Ii. 1 grade of switch is turned off successively (ensureing that operation only 1 grade of 1 tunnel switch is off state) every time, works as self-test
When generation state becomes ' 00 ', illustrate that 2 grades of this road switch exists short trouble；
(c) 1 grade of switch open circuit fault location
I., 1 grade of switch is placed in all off state, and 2 grades of switches are placed in whole closure state, and self-test generates state and is
‘10’；
Ii. 1 grade of switch is closed successively, 2 grades of switches on same road are turned off successively simultaneously and (ensure operation every time only 1
1 grade of road switch Guan Bi, 2 grades of switch OFF), when self-test generation state becomes ' 00 ', illustrate that 1 grade of this road switch does not exist disconnected
Road fault, when self-test generation state is not changed in, illustrates that 1 grade of this road switch exists open circuit fault；
(d) 2 grades of switch open circuit fault location
I., 2 grades of switches are placed in all off state, and 1 grade of switch is placed in whole closure state, and self-test generates state and is
‘01’；
I. 2 grades of switches are closed successively, 1 grade of switch on same road is turned off successively simultaneously and (ensure only 1 tunnel of operation every time
2 grades of switch Guan Bis, 1 grade of switch OFF), when self-test generation state becomes ' 00 ', illustrate that 2 grades of this road switch does not exist open circuit
Fault, when self-test generation state is not changed in, illustrates that 2 grades of this road switch exists open circuit fault.
In sum, these are only presently preferred embodiments of the present invention, be not intended to limit protection scope of the present invention.
All within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included in the present invention's
Within protection domain.
Claims (5)
1. a spacecraft switch matrix fault detect and positioner, it is characterised in that include self-test vector signal generating unit,
The self-test isolated location of more than one group and the self-test state signal generating unit of more than a group；Self-test isolated location and self-test
State signal generating unit one_to_one corresponding；
Described self-test vector signal generating unit respectively switchs test vector carrying one to one for generating in switch matrix
To switch matrix, described test vector controls the on or off in switch matrix to inductive switch；
Often group self-test isolated location is arranged between the adjacent two-stage switch of switch matrix, and described self-test isolated location includes
Self-test isolation module a and self-test isolation module b, described self-test state signal generating unit includes self-test state generation module
A and self-test state generation module b；Wherein, upper level switch and use during self-test isolation module a is arranged on adjacent two-stage switch
Between the load of family, self-test isolation module b is arranged in adjacent two-stage switch between next stage switch and user load, self-test
Isolation module a each road signal that upper level switchs between user load in switching adjacent two-stage is isolated, and will
Signal after isolation flows to corresponding self-test state generation module a after being combined into a road；Self-test isolation module b is used for
In switching adjacent two-stage, each road signal between next stage switch and user load is isolated, and is closed by the signal after isolation
It is to flow to corresponding self-test state generation module b behind a road；
Self-test state generation module a is received from the signal of test isolation module a conveying, and after the level state of signal is changed
Obtain self-test status signal a, self-test state generation module b and be received from the signal of test isolation module b conveying, and to signal
Level state conversion after obtain self-test status signal b, according to the self-test status signal a under each test vector and self-test
The fault of switch matrix is detected and positions by status signal b；
During fault detect, under the control of test vector, carry out all switches respectively all turning on, all off, Ge Jiyi
Secondary all turn on, the most all off operation at different levels, according to the self-test status signal a obtained and self-test shape under each operation
Whether the switches at different levels in switch matrix are existed the state of state signal b short circuit or open circuit fault detects；
If (there is short trouble, then by 1～k-1 level and k+1 in k ∈ (1, n), n > 1) switch for kth level in n level switch matrix
～n level switch all Guan Bis, by all off for k level switch, record self-test status signal a now and self-test status signal
B, disconnects successively by k+1～n level parallel relationship switch afterwards, and operation ensures that an only road paralleling switch is in disconnection shape every time
State, and as k=n, the operation to k+1～n level switch is substituted by 1～k-1 level switching manipulation, and operation is according to self-test every time
Status signal a and self-test status signal b respectively with k level switch all off time record self-test status signal a and test oneself
Whether examination status signal b compares to change and judges whether this road k level switch exists short trouble, if the change of any one state,
Illustrate to there is short trouble；
If (there is open circuit fault, then by 1～k-1 level and k+1 in k ∈ (1, n), n > 1) switch for kth level in n level switch matrix
～n level switch all Guan Bis, by all off for k level switch, record self-test status signal a now and self-test status signal
B, closes successively by kth level switch afterwards, is disconnected successively by k+1～n level parallel relationship switch simultaneously, and operation only ensures every time
The k level switch of one road paralleling switch is in Guan Bi, k+1～n level switch is in disconnection, and as k=n, switchs k+1～n level
Operation substituted by 1～k-1 level switching manipulation, every time operation divides according to self-test status signal a and self-test status signal b
Whether changing judgement compared with the self-test status signal a and self-test status signal b of record time not all off with k level switch should
Whether road k level switch exists open circuit fault, if state is the most unchanged, illustrates to there is open circuit fault.
2. spacecraft switch matrix fault detect as claimed in claim 1 a kind of and positioner, it is characterised in that described from
When test vector generation unit normally works according to switch matrix, the control mode to switch conduction with shutoff generates test vector.
3. spacecraft switch matrix fault detect as claimed in claim 1 a kind of and positioner, it is characterised in that described from
Test isolation module a and self-test isolation module b realizes the isolation of signal by diode, audion, optocoupler or magnetic coupling.
4. a kind of spacecraft switch matrix fault detect as described in claim 1 or 3 and positioner, it is characterised in that
In described self-test isolation module a, in adjacent two-stage switch, each road signal between upper level switch and user load is by dividing
The diode not connecting more than one series connection realizes the isolation of signal, and the signal after isolation is combined into a road and exports, self-test every
All diodes in module a are in the same direction；In self-test isolation module b, user load and next stage in adjacent two-stage switch
Each road signal between switch realizes the isolation of signal, the signal after isolation by connecting the diode of more than one series connection respectively
Being combined into a road and export, all diodes in self-test isolation module b are in the same direction；The diode of self-test isolation module a with from
The diode of test isolation module b is in opposite direction.
5. spacecraft switch matrix fault detect as claimed in claim 1 a kind of and positioner, it is characterised in that described from
Test isolation module a and self-test isolation module b all utilizes optocoupler that the signal that self-test isolated location exports is converted into photoelectricity
Stream, i.e. generates self-test status signal.
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