CN109815626A - A kind of equipment Safeguard characteristic evaluation system based on space mission - Google Patents
A kind of equipment Safeguard characteristic evaluation system based on space mission Download PDFInfo
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Abstract
The equipment Safeguard characteristic evaluation system based on space mission that the present invention relates to a kind of, belong to Space Equipment safeguards technique field, the equipment Safeguard characteristic solved in space mission carries out evaluation problem, manages storage unit and overall task decomposition unit by task data and equipment Safeguard characteristic evaluation model unit establishes equipment Safeguard characteristic evaluation model；The space mission data currently to be assessed are obtained by space mission input interface unit, pass through equipment Safeguard characteristic evaluation unit, according to the current space mission of acquisition, utilize the equipment Safeguard characteristic evaluation model of foundation, equipment Safeguard characteristic evaluation is carried out, provides foundation to execute the reasonable Integrated Equipment Support configuration of space mission progress.The present invention is driving with space mission, based on Space Equipment, using equipment Safeguard as core, to the weak link that may be broken down using modeling with online evaluation means ex ante analysis and anticipation, conscientiously the successful ability for promoting space launch mission, there is apparent benefit.
Description
Technical field
The present invention relates to Space Equipment safeguards technique field more particularly to a kind of equipment Safeguard characteristics based on space mission
Assessment system.
Background technique
Space Equipment is the material technological foundation for completing Space Equipment test, identification, by ensureing characteristic to Space Equipment
Research can solve security problem of the Space Equipment in life cycle management.
The complexity of space mission requires Space Equipment to have diversity and complexity, and in the not same order of space mission
Section, the Space Equipment being related to and the guarantee characteristic requirements difference to Space Equipment, in order to preferably, more reliably complete
Space mission needs to assess Space Equipment supportability；
But since space mission self norms Capability Requirement is high, the less reason of the historical data of space experiment task is lacked
It is adapted to the system that the Space Equipment of space mission ensures characteristic evaluation less.
Summary of the invention
In view of above-mentioned analysis, the present invention is intended to provide a kind of equipment Safeguard characteristic evaluation system based on space mission,
Characteristic evaluation model is ensured by Space Equipment, and the equipment Safeguard characteristic in space mission is assessed.
The purpose of the present invention is mainly achieved through the following technical solutions:
A kind of equipment Safeguard characteristic evaluation system based on space mission, comprising:
Task data manages storage unit, for obtaining space flight historic task data and being stored；
Overall task decomposition unit is obtained for carrying out overall task decomposition to historic task by multiple serial basic
The basic task sequence for composition of being engaged in；
Equipment Safeguard characteristic evaluation model unit, equipment, reliability requirement, failure for being related to according to basic task are sentenced
According to and fault characteristic, establish the equipment Safeguard characteristic evaluation model of the basic task and this appoint substantially in whole space mission
Business rotates into probability；
Space mission input interface unit, for obtaining the space mission data currently to be assessed；
Equipment Safeguard characteristic evaluation unit, it is special using the equipment Safeguard of foundation for the current space mission according to acquisition
Property assessment models, carry out equipment Safeguard characteristic evaluation, carrying out the configuration of reasonable Integrated Equipment Support to execute space mission provides
Foundation.
Further, the overall task decomposition unit carries out overall task decomposition to historic task, is formed by multiple bases
The basic task sequence that this task is constituted；With basic task and it is related to being equipped for index progress historic task data classification, obtains
Basic task historical data；
Further, the overall task decomposition unit includes thick decomposing module and thin decomposing module；
The thick decomposing module, for according to the task phase information in historic task information data, complex task to be drawn
The subtask sequence for being divided into tandem array on the time, not overlapped in task；
The thin decomposing module, the minimum functional configuration for the Space Equipment according to involved in subtask divide subtask
For the basic task sequence not overlapped in time upper tandem array, task.
Further, the equipment Safeguard characteristic evaluation model unit is connect with the overall task decomposition unit, including
Task type determining module ensures characteristic evaluation model building module；
The task type determining module is divided basic task for the minimum functional configuration according to basic task
Class is single dress task, subsystem task or association system task；The list dress task is completed by single task role Space Equipment；It is described
The several equipment subsystems that single Space Equipment is constituted that are mutually related of subsystem task are completed；The association system task by
Multiple be mutually related equips the equipment association system completion of subsystem composition；
It ensures characteristic evaluation model building module, is distinguished according to the type of basic task, establish single dress task equipment Safeguard
Characteristic evaluation model, subsystem task equipment Safeguard characteristic evaluation model or association system equipment Safeguard characteristic evaluation model.
Further, the model for equipment Safeguard characteristic evaluation of guarantee characteristic evaluation model building module foundation includes
Usability model and mission effectiveness model；
When basic task is single dress task, usability model is
Mission effectiveness model is ME1=A01[RM1+(1-RM1)M01]+(1-A01)M01；
In formula, MTBF1To equip the average time between failures in single dress task；MLDT1To equip in single dress task
The average guarantee delay time at stop, when delay including the corrective maintenance interval, preventive maintenance interval, logistics and the management that singly fill
Between；RM1To equip the task confidence level in single dress task；M01To equip the maintainability in single dress task；
When basic task is subsystem task, usability model are as follows:
Mission effectiveness model are as follows: ME2=A02[RM2+(1-RM2)M02]+(1-A02)M02；
In formula, MTBF2It is the average time between failures for equipping subsystem in subsystem task；MLDT2It is equipment subsystem
It unites the average guarantee delay time at stop in subsystem task；RM2To be that equip task of the subsystem in subsystem task reliable
Degree；M02For maintainability of the equipment subsystem in subsystem task；
When basic task is association system task, usability model are as follows:
Mission effectiveness model are as follows: ME3=A03[RM3+(1-RM3)M03]+(1-A03)M03；
In formula, MTBF3It is average time between failures of the association system in association system task；MLDT3It is association system
The average guarantee delay time at stop in association system task；RM3To be that task of the association system in association system task is reliable
Degree；M03For maintainability of the association system in association system task.
Further, the space mission input interface unit is defeated by the received space mission data currently to be assessed
After arriving overall task decomposition unit progress Task-decomposing out, output basic task sequence to equipment Safeguard characteristic evaluation unit is carried out
Ensure characteristic evaluation.
Further, the equipment Safeguard characteristic evaluation unit include assessment models calling module, availability evaluation module,
Mission effectiveness evaluation module；
The assessment models calling module, connect with overall task decomposition unit, is exported according to overall task decomposition unit
Basic task sequence, when calling the corresponding mean time between failures for ensureing characteristic evaluation model and basic task of basic task
Between and averagely ensure the delay time at stop including assessment related data；
The availability evaluation module, according to the corresponding guarantee characteristic evaluation model of the basic task of calling to space mission
Whole availability assessed；
The mission effectiveness evaluation module assesses the overall task efficiency of space mission.
Further, the assessment models that the availability evaluation module uses forFormula
In, MTBFiFor the average time between failures for i-th of basic task for including in overall task；MLDTiTo be wrapped in overall task
The mean failure rate delay time at stop of i-th of the basic task contained.
Further, the mission effectiveness evaluation module includes parameter setting component, assessment operating component and assessment output
Component；
The parameter setting component, for being configured by human-computer interaction interface to assessment parameter, the assessment parameter
Mission Success condition including basic task, the number of run of mission effectiveness assessment；
The availability and mission effectiveness of the Mission Success condition basic task assessment result of the basic task are more than available
Degree and mission effectiveness threshold value, and the task amount completed within the basic task deadline of setting reaches task amount threshold value；
The assessment operating component, the sequence of the basic task sequence for being exported according to overall task decomposition unit, by
One carries out ensureing that characteristic evaluation and Mission Success whether judge, mission failure is exported if task is unsuccessful, and to count down to assessment defeated
Component out；After all basic tasks that overall task includes are all successful, then export Mission Success and count down to assessment output precision；
When assessing the number of run of operating component number of run satisfaction setting, stop counting to assessment output precision output；
The assessment output precision, for the successful number of statistics task, mission failure number and mission effectiveness assessment
Number of run is exported as mission effectiveness assessment result.
Further, the built-in appraisal procedure of the assessment operating component includes:
1) basic task serial number is set, assessment counts, Mission Success counts, mission failure counts, and carries out initial zero setting；
2) count is incremented for assessment, calls the basic task of serial number 1, the equipment Safeguard determined according to the basic task type
Characteristic evaluation model；The equipment Safeguard characteristic evaluation for carrying out basic task obtains assessment result；
3) according to the Mission Success condition of setting, assessment result is judged, if it is determined that basic task success, then into
Enter 4), if it is determined that basic task is unsuccessful, then task failure counter carries out a mission failure counting and is output to institute's commentary
Estimate output precision, stop this assessment, returns 2)；
4) basic task serial number adds 1, calls the basic task of next serial number, judges that can next basic task smoothly be opened
Begin, can smoothly start, then enters 5)；Cannot smoothly it start, then task failure counter carries out a mission failure and counts output
To the assessment output precision, stop this assessment, returns 2)；
5) equipment Safeguard characteristic evaluation is carried out according to the corresponding equipment Safeguard characteristic evaluation model of basic task type and commented
Result judgement is estimated, if it is determined that basic task success, then continue to carry out type judgement to basic task in order, ensure that characteristic is commented
Estimate with assessment result judge, until to a last basic task assessment result be Mission Success, then Mission Success counter into
Mission Success counting of row is output to the assessment output precision, terminates this assessment, returns 2)；If it is determined that basic task
Unsuccessful, then task failure counter carries out a mission failure counting and is output to the assessment output precision, stops this and comments
Estimate, returns 2)；
6) until assessment count down to the number of run of setting, stop assessment.
Wherein, the condition that can next basic task smoothly start is that the task rotates into probability PiGreater than suitable
Benefit starts probability threshold value.
The present invention has the beneficial effect that:
Equipment Safeguard characteristic evaluation method, system based on space mission from the high integrity of Space Equipment and space mission height at
Function top layer requires to set out, and is driving with space mission, based on Space Equipment, using equipment Safeguard as core, close under battle conditions
Simulation executes the real scene and environment, real equipped and guarantee of space mission, true use condition and maintenance condition, using building
The weak link that mould and online evaluation means ex ante analysis and anticipation may break down, can find the problem before task, solve
Certainly problem, it is ensured that it is highly reliable, high intact, the successful ability of space launch mission is promoted conscientiously, there is apparent benefit.
Other features and advantages of the present invention will illustrate in the following description, also, partial become from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention can be by written explanation
Specifically noted structure is achieved and obtained in book, claims and attached drawing.
Detailed description of the invention
Attached drawing is only used for showing the purpose of specific embodiment, and is not to be construed as limiting the invention, in entire attached drawing
In, identical reference symbol indicates identical component.
Fig. 1 is that the equipment Safeguard characteristic evaluation system based on space mission in the embodiment of the present invention forms connection signal
Figure.
Specific embodiment
Specifically describing the preferred embodiment of the present invention with reference to the accompanying drawing, wherein attached drawing constitutes the application a part, and
Together with embodiments of the present invention for illustrating the principle of the present invention.
The equipment Safeguard characteristic evaluation system based on space mission that present embodiment discloses a kind of, as shown in Figure 1, comprising:
Task data manages storage unit, for obtaining space flight historic task data and being stored；
Overall task decomposition unit is obtained for carrying out overall task decomposition to historic task by multiple serial basic
The basic task sequence for composition of being engaged in；
Equipment Safeguard characteristic evaluation model unit, equipment, reliability requirement, failure for being related to according to basic task are sentenced
According to and fault characteristic, establish the equipment Safeguard characteristic evaluation model of the basic task and this appoint substantially in whole space mission
Business rotates into probability；
Space mission input interface unit, for obtaining the space mission data currently to be assessed；
Equipment Safeguard characteristic evaluation unit, it is special using the equipment Safeguard of foundation for the current space mission according to acquisition
Property assessment models, carry out equipment Safeguard characteristic evaluation, carrying out the configuration of reasonable Integrated Equipment Support to execute space mission provides
Foundation.
Specifically, task data management storage unit obtain and the historic task data that store include task process data,
Space Equipment data and Space Equipment ensure performance data；
Specifically historical data includes:
Task process data include: task phase, mission profile, task definition, task time, task restriction, task amount,
The information such as processing of emergency event in Mission Success condition and task execution；
Space Equipment data include: equipment essential information, equipment performance data, equipment configuration data, equipment relevant documentation
Data and equipment technology status data；
Space Equipment ensures that performance data includes: Space Equipment reliability data, Space Equipment maintainability data, space flight dress
Standby protection data etc..
Wherein Space Equipment reliability data includes: the reliability design data, Reliability modeling data, event of Space Equipment
Fault tree analysis data, reliability block diagram data, Failure Mode Effective Analysis data and Event Tree Analysis ETA data, use process
Reliability data；
Space Equipment maintainability data include: the capability of maintenance design data of Space Equipment, Failure Mode Effective Analysis data,
Maintenance task data, use process maintainability data；
Space Equipment protection data include: the Supportability design data of Space Equipment, use process protection data, protect
Hinder resource data, support mission demand data.
Specifically, the overall task decomposition unit, carries out overall task decomposition to historic task, formed by multiple basic
The basic task sequence that task is constituted；With basic task and it is related to being equipped for index progress historic task data classification, obtains base
This task historical data；
More specifically, the overall task decomposition unit includes thick decomposing module and thin decomposing module；
The thick decomposing module, for according to the task phase information in historic task information data, complex task to be drawn
The subtask sequence for being divided into tandem array on the time, not overlapped in task；
In rough segmentation solution preocess, also determine to include the task restrictions such as task beginning and ending time, the task amount of each subtask letter
The Space Equipment data and Space Equipment for ceasing and being related to ensure performance data；Subtask, Space Equipment corresponding relationship are established, will be gone through
The historical data of history assignment database is classified for index with Space Equipment is related to subtask content, obtains to subtask and go through
History data；
The thin decomposing module, the minimum functional configuration for the Space Equipment according to involved in subtask divide subtask
For the basic task sequence not overlapped in time upper tandem array, task.
In subdivision solution preocess, the attribute information of basic task is extracted also from the historical data of subtask；
Wherein attribute information includes task restriction information and Space Equipment data；
Task restriction information includes the information such as task beginning and ending time, task amount；
Space Equipment data are the Space Equipment data and equipment Safeguard performance data for executing basic task and being related to；
By the way that basic task is corresponding with Space Equipment is related to, basic task, Space Equipment corresponding relationship are established, determines and appoints
The Space Equipment that business is related to classifies subtask historical data with Space Equipment is related to basic task content for index,
Obtain basic task historical data.
Specifically, the equipment Safeguard characteristic evaluation model unit, connect with the overall task decomposition unit, including appoint
Service type determining module ensures characteristic evaluation model building module；
The task type determining module is divided basic task for the minimum functional configuration according to basic task
Class is single dress task, subsystem task or association system task；The list dress task is completed by single task role Space Equipment；It is described
The several equipment subsystems that single Space Equipment is constituted that are mutually related of subsystem task are completed；The association system task by
Multiple be mutually related equips the equipment association system completion of subsystem composition；
It ensures characteristic evaluation model building module, is distinguished according to the type of basic task, establish single dress task equipment Safeguard
Characteristic evaluation model, subsystem task equipment Safeguard characteristic evaluation model or association system equipment Safeguard characteristic evaluation model.
More specifically, the model for equipment Safeguard characteristic evaluation of guarantee characteristic evaluation model building module foundation includes
Usability model and mission effectiveness model；
When basic task is single dress task, usability model is
Mission effectiveness model is ME1=A01[RM1+(1-RM1)M01]+(1-A01)M01；
In formula, MTBF1To equip the average time between failures in single dress task；MLDT1To equip in single dress task
The average guarantee delay time at stop, when delay including the corrective maintenance interval, preventive maintenance interval, logistics and the management that singly fill
Between；RM1To equip the task confidence level in single dress task；M01To equip the maintainability in single dress task；
When basic task is subsystem task, usability model are as follows:
Mission effectiveness model are as follows: ME2=A02[RM2+(1-RM2)M02]+(1-A02)M02；
In formula, MTBF2It is the average time between failures for equipping subsystem in subsystem task；MLDT2It is equipment subsystem
It unites the average guarantee delay time at stop in subsystem task；RM2To be that equip task of the subsystem in subsystem task reliable
Degree；M02For maintainability of the equipment subsystem in subsystem task；
Average time between failures and averagely guarantee delay time at stop for subsystem calculate, and can use with reference to MTBF
Duane model or MLDT use based on field maintenance factor computation model.
When basic task is association system task, usability model are as follows:
Mission effectiveness model are as follows: ME3=A03[RM3+(1-RM3)M03]+(1-A03)M03；
In formula, MTBF3It is average time between failures of the association system in association system task；MLDT3It is association system
The average guarantee delay time at stop in association system task；RM3For Task Reliability of the association system in association system task；
M03For maintainability of the association system in association system task.
Ensure characteristic evaluation model building module, generate basic task equipment Safeguard characteristic evaluation model simultaneously, also
Rotate into probability P of the basic task in whole space mission is calculated, rotating into probability P is space flight involved by basic task
Equip the usable probability AS in the basic task start time.
Specifically, the received space mission data currently to be assessed are output to whole by space mission input interface unit
After body Task-decomposing unit carries out Task-decomposing, output basic task sequence to equipment Safeguard characteristic evaluation unit ensure special
Property assessment.
The thick decomposing module and thin decomposing module of overall task decomposition unit decompose current space mission, obtain son
Task sequence and basic task sequence；It is output to equipment Safeguard characteristic evaluation unit；
Specifically, equipment Safeguard characteristic evaluation unit includes assessment models calling module, availability evaluation module, task effect
It can evaluation module；
Wherein, assessment models calling module is connect with overall task decomposition unit, is exported according to overall task decomposition unit
Basic task sequence, when calling the corresponding mean time between failures for ensureing characteristic evaluation model and basic task of basic task
Between and averagely ensure the delay time at stop including assessment related data；
Availability evaluation module, according to the corresponding guarantee characteristic evaluation model of the basic task of calling to the whole of space mission
Body availability is assessed；
Mission effectiveness evaluation module assesses the overall task efficiency of space mission.
Preferably, the assessment models that availability evaluation module uses forIn formula,
MTBFiFor the average time between failures for i-th of basic task for including in overall task；MLDTiTo include in overall task
The mean failure rate delay time at stop of i-th of basic task.
Specifically, mission effectiveness evaluation module includes parameter setting component, assessment operating component and assessment output precision；
Wherein parameter setting component, for obtaining the assessment parameter being arranged by human-computer interaction interface, the assessment parameter
Mission Success condition including basic task, the number of run of mission effectiveness assessment；
Preferably, the Mission Success condition of basic task described in the Mission Success condition of basic task includes that basic task is commented
The availability for estimating result is more than threshold value and mission effectiveness is more than threshold value, and completed within the basic task deadline of setting
Task amount reaches task amount threshold value.
Assess operating component, the sequence of the basic task sequence for being exported according to overall task decomposition unit, one by one into
Row judges whether ensureing characteristic evaluation and Mission Success, and mission failure is exported if task is unsuccessful and count down to assessment output group
Part；After all basic tasks that overall task includes are all successful, then export Mission Success and count down to assessment output precision；When commenting
When estimating the number of run of operating component number of run satisfaction setting, stop counting to assessment output precision output；
The assessment output precision, for the successful number of statistics task, mission failure number and mission effectiveness assessment
Number of run is exported as mission effectiveness assessment result.
Preferably, the built-in appraisal procedure of the assessment operating component includes:
1) basic task serial number is set, assessment counts, Mission Success counts, mission failure counts, and carries out initial zero setting；
2) count is incremented for assessment, calls the basic task of serial number 1, the equipment Safeguard determined according to the basic task type
Characteristic evaluation model；The equipment Safeguard characteristic evaluation for carrying out basic task obtains assessment result；
3) according to the Mission Success condition of setting, assessment result is judged, if it is determined that basic task success, then into
Enter 4), if it is determined that basic task is unsuccessful, then task failure counter carries out a mission failure counting and is output to institute's commentary
Estimate output precision, stop this assessment, returns 2)；
4) basic task serial number adds 1, calls the basic task of next serial number, judges that can next basic task smoothly be opened
Begin, can smoothly start, then enters 5)；Cannot smoothly it start, then task failure counter carries out a mission failure and counts output
To the assessment output precision, stop this assessment, returns 2)；
5) equipment Safeguard characteristic evaluation is carried out according to the corresponding equipment Safeguard characteristic evaluation model of basic task type and commented
Result judgement is estimated, if it is determined that basic task success, then continue to carry out type judgement to basic task in order, ensure that characteristic is commented
Estimate with assessment result judge, until to a last basic task assessment result be Mission Success, then Mission Success counter into
Mission Success counting of row is output to the assessment output precision, terminates this assessment, returns 2)；If it is determined that basic task
Unsuccessful, then task failure counter carries out a mission failure counting and is output to the assessment output precision, stops this and comments
Estimate, returns 2)；
6) until assessment count down to the number of run of setting, stop assessment.
Wherein, the condition that can next basic task smoothly start is that the task rotates into probability PiGreater than suitable
Benefit starts probability threshold value.
Preferably, in the present embodiment, equipment Safeguard characteristic evaluation unit can also be to overall task decomposition unit rough segmentation
The subtask of solution output carries out equipment Safeguard characteristic evaluation, is only closed to some task phase of space launch mission with facilitating
Note assesses equipment Safeguard characteristic, finds the problem, solves the problems, such as, it is ensured that and it is highly reliable, high intact, space launch mission is promoted conscientiously
Successful ability.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of equipment Safeguard characteristic evaluation system based on space mission characterized by comprising
Task data manages storage unit, for obtaining space flight historic task data and being stored；
Overall task decomposition unit is obtained for carrying out overall task decomposition to historic task by multiple serial basic task structures
At basic task sequence；
Equipment Safeguard characteristic evaluation model unit, equipment, reliability requirement, failure criterion for being related to according to basic task and
Fault characteristic, the equipment Safeguard characteristic evaluation model and the basic task in whole space mission for establishing the basic task
Rotate into probability；
Space mission input interface unit, for obtaining the space mission data currently to be assessed；
Equipment Safeguard characteristic evaluation unit is commented for the current space mission according to acquisition using the equipment Safeguard characteristic of foundation
Estimate model, carries out equipment Safeguard characteristic evaluation.
2. equipment Safeguard characteristic evaluation system according to claim 1, which is characterized in that the overall task is decomposed single
Member carries out overall task decomposition to historic task, forms the basic task sequence being made of multiple basic tasks；With basic task
Historic task data classification is carried out with being related to being equipped for index, obtains basic task historical data.
3. equipment Safeguard characteristic evaluation system according to claim 1, which is characterized in that the overall task decomposition unit
Including thick decomposing module and thin decomposing module；
The thick decomposing module, for according to the task phase information in historic task information data, complex task to be divided into
Tandem array on time, the subtask sequence not overlapped in task；
The thin decomposing module, when subtask is divided by the minimum functional configuration for the Space Equipment according to involved in subtask
Between upper tandem array, the basic task sequence that does not overlap in task.
4. equipment Safeguard characteristic evaluation system according to claim 3, which is characterized in that the equipment Safeguard characteristic evaluation
Model unit is connect with the overall task decomposition unit, including task type determining module, guarantee characteristic evaluation model foundation
Module；
Basic task is classified as by the task type determining module for the minimum functional configuration according to basic task
Single dress task, subsystem task or association system task；The list dress task is completed by single task role Space Equipment；The subsystem
The several equipment subsystems that single Space Equipment is constituted that are mutually related of system task are completed；The association system task is by multiple
It is mutually related and equips the equipment association system completion of subsystem composition；
It ensures characteristic evaluation model building module, is distinguished according to the type of basic task, establish single dress task equipment Safeguard characteristic
Assessment models, subsystem task equipment Safeguard characteristic evaluation model or association system equipment Safeguard characteristic evaluation model.
5. equipment Safeguard characteristic evaluation system according to claim 3, which is characterized in that ensure characteristic evaluation model foundation
The model for equipment Safeguard characteristic evaluation that module is established includes usability model and mission effectiveness model；
When basic task is single dress task, usability model is
Mission effectiveness model is ME1=A01[RM1+(1-RM1)M01]+(1-A01)M01；
In formula, MTBF1To equip the average time between failures in single dress task；MLDT1It is flat in single dress task to equip
Ensure the delay time at stop, including singly fill corrective maintenance interval, preventive maintenance interval, logistics and management delay time at stop；RM1
To equip the task confidence level in single dress task；M01To equip the maintainability in single dress task；
When basic task is subsystem task, usability model are as follows:
Mission effectiveness model are as follows: ME2=A02[RM2+(1-RM2)M02]+(1-A02)M02；
In formula, MTBF2It is the average time between failures for equipping subsystem in subsystem task；MLDT2It is that equipment subsystem exists
The average guarantee delay time at stop in subsystem task；RM2To be to equip Task Reliability of the subsystem in subsystem task；M02
For maintainability of the equipment subsystem in subsystem task；
When basic task is association system task, usability model are as follows:
Mission effectiveness model are as follows: ME3=A03[RM3+(1-RM3)M03]+(1-A03)M03；
In formula, MTBF3It is average time between failures of the association system in association system task；MLDT3It is that association system is joining
Close the average guarantee delay time at stop in system task；RM3To be Task Reliability of the association system in association system task；M03
For maintainability of the association system in association system task.
6. equipment Safeguard characteristic evaluation system according to claim 3, which is characterized in that the space mission input interface
The received space mission data currently to be assessed are output to after overall task decomposition unit carries out Task-decomposing by unit, defeated
Basic task sequence carries out guarantee characteristic evaluation to equipment Safeguard characteristic evaluation unit out.
7. equipment Safeguard characteristic evaluation system according to claim 6, which is characterized in that the equipment Safeguard characteristic evaluation
Unit includes assessment models calling module, availability evaluation module, mission effectiveness evaluation module；
The assessment models calling module, connect with overall task decomposition unit, the base exported according to overall task decomposition unit
This task sequence, call the corresponding average time between failures for ensureing characteristic evaluation model and basic task of basic task and
Averagely ensure the assessment related data including the delay time at stop；
The availability evaluation module, according to the corresponding guarantee characteristic evaluation model of the basic task of calling to the whole of space mission
Body availability is assessed；
The mission effectiveness evaluation module assesses the overall task efficiency of space mission.
8. equipment Safeguard characteristic evaluation system according to claim 7, which is characterized in that the availability evaluation module is adopted
Assessment models areIn formula, MTBFiBasic appoint for include in overall task i-th
The average time between failures of business；MLDTiThe mean failure rate delay time at stop for i-th of basic task for including in overall task.
9. equipment Safeguard characteristic evaluation system according to claim 7, which is characterized in that the mission effectiveness evaluation module
Including parameter setting component, assessment operating component and assessment output precision；
The parameter setting component, for being configured by human-computer interaction interface to assessment parameter, the assessment parameter includes
The Mission Success condition of basic task, the number of run of mission effectiveness assessment；
The Mission Success condition of the basic task includes that the availability of basic task assessment result is more than threshold value and mission effectiveness
More than threshold value, and the task amount completed within the basic task deadline of setting reaches task amount threshold value；
The assessment operating component, the sequence of the basic task sequence for being exported according to overall task decomposition unit, one by one into
Row judges whether ensureing characteristic evaluation and Mission Success, and mission failure is exported if task is unsuccessful and count down to assessment output group
Part；After all basic tasks that overall task includes are all successful, then export Mission Success and count down to assessment output precision；When commenting
When estimating the number of run of operating component number of run satisfaction setting, stop counting to assessment output precision output；
The assessment output precision, the operation for the successful number of statistics task, mission failure number and mission effectiveness assessment
Number is exported as mission effectiveness assessment result.
10. equipment Safeguard characteristic evaluation system according to claim 9, which is characterized in that the assessment operating component
Built-in appraisal procedure includes:
1) basic task serial number, assessment are counted, Mission Success counts, mission failure counts and carries out initial zero setting；
2) count is incremented for assessment, calls the basic task of serial number 1, the equipment Safeguard characteristic determined according to the basic task type
Assessment models；The equipment Safeguard characteristic evaluation for carrying out basic task obtains assessment result；
3) according to the Mission Success condition of setting, assessment result is judged, if it is determined that basic task success, then enter
4), if it is determined that basic task is unsuccessful, then task failure counter carries out a mission failure counting and is output to the assessment
Output precision stops this assessment, returns 2)；
4) basic task serial number adds 1, calls the basic task of next serial number, judges that can next basic task smoothly start,
It can smoothly start, then enter 5)；Cannot smoothly it start, then task failure counter carries out a mission failure counting and is output to institute
Output precision is estimated in commentary, stops this assessment, returns 2)；
5) equipment Safeguard characteristic evaluation is carried out according to the corresponding equipment Safeguard characteristic evaluation model of basic task type and assessment is tied
Fruit judgement, if it is determined that basic task success, then continue in order to basic task carry out type judgement, ensure characteristic evaluation and
Assessment result judgement, until being Mission Success to a last basic task assessment result, then Mission Success counter carries out one
Subtask success count is output to the assessment output precision, terminates this assessment, returns 2)；If it is determined that basic task not at
Function, then task failure counter carries out a mission failure counting and is output to the assessment output precision, stops this assessment, returns
It returns 2)；
6) until assessment count down to the number of run of setting, stop assessment.
Wherein, the condition that can next basic task smoothly start is that the task rotates into probability PiStart greater than smooth
Probability threshold value.
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