CN109885933A - A kind of equipment Safeguard method of evaluating characteristic based on space mission - Google Patents
A kind of equipment Safeguard method of evaluating characteristic based on space mission Download PDFInfo
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Abstract
The present invention relates to a kind of equipment Safeguard method of evaluating characteristic based on space mission belongs to Space Equipment safeguards technique field, and the equipment Safeguard characteristic solved in space mission carries out evaluation problem, and method includes assessment models establishment step and online evaluation step；The equipment Safeguard characteristic evaluation model of basic task is established by assessment models establishment step；Current space mission is obtained by online evaluation step, Task-decomposing is carried out into basic task sequence, utilizes the assessment models of foundation；According to specific assessment parameter, the equipment Safeguard characteristic evaluation of overall task is carried out.The present invention is driving with space mission, and based on Space Equipment, using equipment Safeguard as core, the weak link that may be broken down using modeling with online evaluation means ex ante analysis and anticipation is promoted the successful ability of space launch mission conscientiously, 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
Appraisal procedure.
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 method 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 method of evaluating characteristic 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 method of evaluating characteristic based on space mission, comprising:
Assessment models establishment step: obtaining space flight historic task data, carries out overall task decomposition to historic task, obtains
The basic task sequence being made of multiple serial basic tasks；The equipment that is related to according to basic task, reliability requirement, failure 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, is stored in database profession；
Online evaluation step: obtaining current space mission, space mission is decomposed into serial basic task sequence, from number
Probability is rotated into according to transfer equipment Safeguard characteristic evaluation model corresponding with the basic task and the basic task in library；According to
The specific assessment parameter of setting, carries out the equipment Safeguard characteristic evaluation of overall task.
Further, the assessment models establishment step includes:
The space flight historic task data that will acquire import database, history of forming assignment database；
Overall task decomposition is carried out to historic task, forms the basic task sequence being made of multiple basic tasks；With base
This task and being related to is equipped for index and carries out historic task data classification, obtains basic task historical data；
The equipment Safeguard characteristic evaluation model of basic task is established to basic task historical data, and calculates the basic task
Rotate into probability.
Further, it includes rough segmentation solution and subdivision solution that the overall task, which is decomposed,；
Complex task is divided into time upper head according to the task phase information in mission bit stream data by the rough segmentation solution
The subtask sequence not overlapped in tail linking, task；
Subtask is divided on the time by the subdivision solution, the minimum functional configuration of the Space Equipment according to involved in subtask
The basic task sequence not overlapped on tandem array, task.
Further, according to the minimum functional configuration of Space Equipment, basic task is divided into complete by single task role Space Equipment
At single dress task, be made of certain several single Space Equipment that are mutually related equipment subsystem complete subsystem task,
The association system task for the equipment association system completion that subsystem forms is equipped by multiple be mutually related；
The basic task equipment Safeguard characteristic evaluation model of foundation is also corresponding to include, and single task equipment Safeguard characteristic that fills is commented
Estimate model, subsystem task equipment Safeguard characteristic evaluation model or association system equipment Safeguard characteristic evaluation model.
Further, single dress ensures that characteristic evaluation model includes the usability model and single dress task effect of single dress task
It can model；
The usability model of single dress task is
Single dress 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；
The subsystem task equipment Safeguard characteristic evaluation model includes the usability model and subsystem of subsystem task
Mission effectiveness model；
The usability model of the subsystem task are as follows:
The subsystem 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；
The association system task equipment Safeguard characteristic evaluation model includes the usability model and connection of association system task
Collaboration system mission effectiveness model；
The usability model of the association system task are as follows:
The association system 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 online evaluation step includes:
Obtain current space mission；
Space mission is decomposed into serial basic task sequence, equipment corresponding with basic task is transferred from database
It ensures characteristic evaluation model and corresponding with basic task rotates into probability；
According to the assessment parameter of setting, according to basic task task order and accordingly rotate into probability, carry out whole
The equipment Safeguard characteristic evaluation of task；
The equipment Safeguard characteristic evaluation of the overall task includes the availability assessment and mission effectiveness assessment of overall task.
Further, the availability assessment of the overall task uses formula:
In formula, A0' be overall task availability；MTBFiTo be wrapped in overall task
The average time between failures of i-th of the basic task contained；MLDTiFor the flat of i-th of basic task including in overall task
The equal failure delay time at stop.
Further, the mission effectiveness appraisal procedure of the overall task, comprising:
1) setting assessment parameter；
Mission Success condition including each basic task, the number of run of mission effectiveness assessment, and to basic task sequence
Number, 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, judges that basic task is single dress task, subsystem task
Or association system task；According to single dress task equipment Safeguard characteristic evaluation model of foundation, subsystem task equipment Safeguard characteristic
Assessment models or association system equipment Safeguard characteristic evaluation model；The equipment Safeguard characteristic evaluation for carrying out basic task is assessed
As a 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, stops this and comments
Estimate, 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 counting, stops
2) this assessment, returns；
5) equipment Safeguard characteristic evaluation is carried out according to basic task type and assessment result judges, if it is determined that basic task
Success then continues to carry out type judgement to basic task in order, ensures characteristic evaluation and assessment result judgement, until to the end
One basic task assessment result is Mission Success, then Mission Success counter carries out a Mission Success counting, terminates this
2) assessment returns；If it is determined that basic task is unsuccessful, then task failure counter carries out a mission failure counting, stops
2) this assessment, returns；
6) until assessment count down to the number of run of setting, stop assessment, statistics task success count value and mission failure
Count value carries out the mission effectiveness assessment of whole space mission.
Further, the basic task success conditions are that the availability of basic task assessment result is more than availability threshold
Value and mission effectiveness be more than mission effectiveness threshold value, and the task amount completed within the basic task deadline of setting reach appoint
Business amount threshold value.
Further, the condition that can next basic task smoothly start is that the task rotates into probability PiGreatly
In smoothly beginning probability threshold value.
The present invention has the beneficial effect that:
Equipment Safeguard method of evaluating characteristic based on space mission is successful from the high integrity of Space Equipment and space mission height
Property top layer require set out, with space mission be driving, based on Space Equipment, using equipment Safeguard as core, close to actual combat mould
The quasi- real scene for executing space mission and environment, real equipped and guarantee, true use condition and maintenance condition, using modeling
The weak link that may be broken down with online evaluation means ex ante analysis and anticipation, can find the problem before task, solve
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 the equipment Safeguard method of evaluating characteristic flow chart based on space mission in the embodiment of the present invention；
Fig. 2 is the overall task measures of effectiveness flow chart in the embodiment of the present invention.
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.
Present embodiment discloses a kind of equipment Safeguard method of evaluating characteristic based on space mission, as shown in Figure 1, comprising:
Assessment models establishment step: obtaining space flight historic task data, carries out overall task decomposition to historic task, obtains
The basic task sequence being made of multiple serial basic tasks；The equipment that is related to according to basic task, reliability requirement, failure 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, is stored in database profession；
Online evaluation step: obtaining current space mission, space mission is decomposed into serial basic task sequence, from number
According to transferring and decomposing in library, rotating into for the obtained corresponding equipment Safeguard characteristic evaluation model of basic task and the basic task is general
Rate；According to the specific assessment parameter of setting, carry out the equipment Safeguard characteristic evaluation of overall task, for for execute space mission into
The reasonable Integrated Equipment Support configuration of row provides foundation.
Specifically, assessment models establishment step includes:
Step S1-1, the space flight historic task data that will acquire import database, history of forming assignment database；
The historic task data include that 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；
Step S1-2, overall task decomposition is carried out to historic task, forms the basic task being made of multiple basic tasks
Sequence；Establish basic task, the historical data of historic task database with task definition and is related to filling by equipment corresponding relationship
It is standby to classify for index, obtain basic task historical data.
Specifically, it includes rough segmentation solution and subdivision solution that the overall task, which is decomposed,；
In rough segmentation solution preocess, according to the task phase information in task process data, complex task is divided into the time
The subtask sequence not overlapped on upper tandem array, task, and the determining task beginning and ending time including each subtask, task
The task restrictions information such as amount and the Space Equipment data being related to and Space Equipment ensure performance data；Establish subtask, space flight dress
Standby corresponding relationship is divided the historical data of historic task database with Space Equipment is related to subtask content for index
Class obtains subtask historical data；
In subdivision solution preocess, when subtask is divided by the minimum functional configuration of the Space Equipment according to involved in subtask
Between upper tandem array, the basic task sequence that does not overlap in task, and basic task is extracted from the historical data of subtask
Attribute information；
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, basic task type can be divided into be filled by single task role space flight according to the minimum functional configuration of Space Equipment
The standby single dress task completed；Or the subsystem that the equipment subsystem to be made of certain several single Space Equipment that are mutually related is completed
System task；Or to equip the association system task for the equipment association system completion that subsystem forms by multiple be mutually related；
It include equipment involved in basic task, reliability requirement, failure criterion and failure in basic task historical data
The historical datas such as characteristic.
Step S1-3, the equipment Safeguard characteristic evaluation model of basic task is established to basic task historical data；
Since basic task includes single dress task, subsystem task or association system task；The basic task dress then established
Include for ensureing that characteristic evaluation model is also corresponding, it is single to fill task equipment Safeguard characteristic evaluation model, subsystem task equipment guarantor
Hinder characteristic evaluation model or association system task equipment Safeguard characteristic evaluation model.
Single dress ensures characteristic evaluation model, by carrying out mission effectiveness analysis to single dress task, fills task history according to single
The Space Equipment data and Space Equipment for including in data ensure performance data, establish and exist comprising single dress availability and mission effectiveness
Interior guarantee characteristic evaluation model；
Singly the usability model of dress task is
Single dress 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 the average guarantee delay time at stop in single dress task, for example including between the corrective maintenance singly filled
Every, preventive maintenance interval, the delay time at stop of logistics and management；
RM1To equip the task confidence level in single dress task；
M01To equip the maintainability in single dress task.
Subsystem task equipment Safeguard characteristic evaluation model carries out mission effectiveness analysis by sub-system task, according to
Space Equipment data and Space Equipment ensure performance data in equipment subsystem involved in subsystem historic task data, establish
Include the guarantee characteristic evaluation model including subsystem availability and mission effectiveness；
Wherein, the usability model of subsystem task are as follows:
Subsystem 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, namely executes the task
Space Equipment subsystem operable time,
MLDT2It is the average guarantee delay time at stop for equipping subsystem in subsystem task, namely executes the boat of the task
The not operable time of its equipment subsystem, for example including the equipment corrective maintenance interval of subsystem, preventive maintenance interval, after
The diligent delay time at stop with management；
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.
RM2It is that the task of entire equipment subsystem is reliable to be the Task Reliability for equipping subsystem in subsystem task
Degree；
M02It is the maintainability of certain equipment subsystem for maintainability of the equipment subsystem in subsystem task.
Association system task equipment Safeguard characteristic evaluation model, by carrying out mission effectiveness analysis to association system task,
Space Equipment data and Space Equipment ensure performance data in the equipment association system being related to according to historic task data, establish packet
Guarantee characteristic evaluation model including availability containing association system and mission effectiveness；
Wherein, the usability model of association system task are as follows:
Association system 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, namely executes the task
Certain Space Equipment association system operable time；It is not the operable time of some equipment；
MLDT3It is average guarantee delay time at stop of the association system in association system task, namely executes certain of the task
The not operable time of Space Equipment association system, corrective maintenance interval, preventive maintenance interval for example including association system,
The delay time at stop of logistics and management；
RM3It is the Task Reliability of certain association system to be Task Reliability of the association system in association system task；
M03It is the maintainability of certain association system for maintainability of the association system in association system task.
Generate basic task equipment Safeguard characteristic evaluation model simultaneously, also to the basic task in whole space mission
In the probability P that rotates into calculated, rotating into probability P is Space Equipment involved by basic task in the basic task start time
Usable probability AS.
Specifically, online evaluation step includes:
Step S2-1, current space mission is obtained；
Step S2-2, space mission is decomposed into serial basic task sequence, is transferred from database and basic task
Corresponding equipment Safeguard characteristic evaluation model and corresponding with basic task rotate into probability；
Specific task analytic approach is identical with the method in step S1-2, after decomposing, be divided into it is continuous in time, times
The basic task sequence not overlapped in business.Basic task serial number i in sequence, each timing node t in sequenceiIt represents basic
Task MiLate finish time point and basic task Mi+1Late Start, the period T between nodeiIt is basic to this
Task time constraint；
Due to the diversity of task, different basic tasks have different task amount WiUnit, such as milimeter number, shooting hair
Number.It needs for these task amounts to be converted into broad sense working time Ti, carry out the unit unification of task calendar time；
Specifically, broad sense working time Ti=Wi/ λ, wherein λ is conversion coefficient, according to different task type, is provided in statistics
It is determined on the basis of material.Such as, the corresponding task amount unit of chassis system is " kilometer ", and other function systems are similarly.
According to the basic task sequence of decomposition, equipment Safeguard characteristic corresponding with each basic task is transferred from database
Assessment models and and corresponding with basic task rotate into probability Pi；
Step S2-3, according to the assessment parameter of setting, according to basic task task order and accordingly rotate into probability,
Carry out the equipment Safeguard characteristic evaluation of overall task.
The equipment Safeguard characteristic evaluation of overall task includes that the availability assessment of overall task and the task of overall task are imitated
It can assessment.
Wherein, the availability A of overall task0' based on composition overall task each basic task mean time between failures when
Between MTBFiWith mean failure rate delay time at stop MLDTi；
The availability of overall task
In formula, MTBFiFor the average time between failures for i-th of basic task for including in overall task；
MLDTiThe mean failure rate delay time at stop for i-th of basic task for including in overall task.
Specifically, mission effectiveness appraisal procedure, as shown in Figure 2, comprising:
1) setting assessment parameter；
Mission Success condition including each basic task, the number of run of mission effectiveness assessment, and to basic task sequence
Number, 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, judges that basic task is single dress task, subsystem task
Or association system task；According to single dress task equipment Safeguard characteristic evaluation model of foundation, subsystem task equipment Safeguard characteristic
Assessment models or association system equipment Safeguard characteristic evaluation model；The equipment Safeguard characteristic evaluation for carrying out basic task is assessed
As a 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, stops this and comments
Estimate, 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 counting, stops
2) this assessment, returns；
5) equipment Safeguard characteristic evaluation is carried out according to basic task type and assessment result judges, if it is determined that basic task
Success then continues to carry out type judgement to basic task in order, ensures characteristic evaluation and assessment result judgement, until to the end
One basic task assessment result is Mission Success, then Mission Success counter carries out a Mission Success counting, terminates this
2) assessment returns；If it is determined that basic task is unsuccessful, then task failure counter carries out a mission failure counting, stops
2) this assessment, returns；
6) until assessment count down to the number of run of setting, stop assessment, statistics task success count value and mission failure
Count value carries out the mission effectiveness assessment of whole space mission.
Wherein, it is more than availability threshold value that the Mission Success condition of basic task, which includes the availability of basic task assessment result,
It is more than mission effectiveness threshold value with mission effectiveness, and the task amount completed within the basic task deadline of setting reaches task
Measure threshold value
Wherein, the condition for judging that can next basic task smoothly start is that basic task rotates into probability PiWhether
Start probability threshold value greater than smooth, be greater than and smoothly start probability threshold value, then next basic task smoothly starts, and otherwise stops this
Secondary assessment.
Preferably, method through this embodiment can also obtain subtask to rough segmentation solution in Task-decomposing, be equipped
It ensures characteristic evaluation, only some task phase of space launch mission is paid close attention to facilitating, assess equipment Safeguard characteristic, hair
Existing problem solves the problems, such as, it is ensured that it is highly reliable, high intact, the successful ability of space launch mission is promoted conscientiously.
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 method of evaluating characteristic based on space mission characterized by comprising
Assessment models establishment step: obtaining space flight historic task data, carries out overall task decomposition to historic task, obtains by more
The basic task sequence that a serial basic task is constituted；The equipment that is related to according to basic task, reliability requirement, failure criterion and
Fault characteristic, the equipment Safeguard characteristic evaluation model and the basic task in whole space mission for establishing the basic task
Probability is rotated into, is stored in database profession；
Online evaluation step: obtaining current space mission, space mission is decomposed into serial basic task sequence, from database
In transfer equipment Safeguard characteristic evaluation model corresponding with the basic task and the basic task rotate into probability；According to setting
Specific assessment parameter, carries out the equipment Safeguard characteristic evaluation of overall task.
2. equipment Safeguard method of evaluating characteristic according to claim 1, which is characterized in that the assessment models establishment step
Include:
The space flight historic task data that will acquire import database, history of forming assignment database；
Overall task decomposition is carried out to historic task, forms the basic task sequence being made of multiple basic tasks；To appoint substantially
It is engaged in and is related to being equipped for index progress historic task data classification, obtain basic task historical data；
The equipment Safeguard characteristic evaluation model of basic task is established to basic task historical data, and calculates turning for the basic task
Into probability.
3. equipment Safeguard method of evaluating characteristic according to claim 2, which is characterized in that the overall task, which is decomposed, includes
Rough segmentation solution and subdivision solution；
Complex task is divided into time upper head and the tail and held in the mouth by the rough segmentation solution according to the task phase information in mission bit stream data
The subtask sequence connect, not overlapped in task；
Subtask is divided into time upper head and the tail by the minimum functional configuration of the subdivision solution, the Space Equipment according to involved in subtask
The basic task sequence not overlapped in linking, task.
4. equipment Safeguard method of evaluating characteristic according to claim 3, which is characterized in that according to the least work of Space Equipment
It can configure, basic task is divided into the single dress task completed by single task role Space Equipment, by certain several single boat that are mutually related
The subsystem task that equipment subsystem that its equipment is constituted is completed is equipped the equipment that subsystem forms and is joined by multiple be mutually related
The association system task that collaboration system is completed；
The basic task equipment Safeguard characteristic evaluation model of foundation is also corresponding to include, single to fill task equipment Safeguard characteristic evaluation mould
Type, subsystem task equipment Safeguard characteristic evaluation model or association system equipment Safeguard characteristic evaluation model.
5. equipment Safeguard method of evaluating characteristic according to claim 4, which is characterized in that
Single dress guarantee characteristic evaluation model includes the usability model and list dress mission effectiveness model of single dress task；
The usability model of single dress task is
Single dress 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；
The subsystem task equipment Safeguard characteristic evaluation model includes the usability model and subsystem task of subsystem task
Effectiveness models；
The usability model of the subsystem task are as follows:
The subsystem 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；
The association system task equipment Safeguard characteristic evaluation model includes usability model and the joint system of association system task
System mission effectiveness model；
The usability model of the association system task are as follows:
The association system 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 method of evaluating characteristic according to claim 1, which is characterized in that the online evaluation step packet
It includes:
Obtain current space mission；
Space mission is decomposed into serial basic task sequence, equipment Safeguard corresponding with basic task is transferred from database
Characteristic evaluation model and corresponding with basic task rotate into probability；
According to the assessment parameter of setting, according to basic task task order and accordingly rotate into probability, carry out overall task
Equipment Safeguard characteristic evaluation；
The equipment Safeguard characteristic evaluation of the overall task includes the availability assessment and mission effectiveness assessment of overall task.
7. equipment Safeguard method of evaluating characteristic according to claim 3, which is characterized in that the overall task can be used
Degree assessment uses formulaIn formula, A0' be overall task availability；MTBFiAppoint to be whole
The average time between failures for i-th of basic task for including in business；MLDTiBasic appoint for include in overall task i-th
The mean failure rate delay time at stop of business.
8. equipment Safeguard method of evaluating characteristic according to claim 3, which is characterized in that the task of the overall task is imitated
Energy appraisal procedure, comprising:
1) setting assessment parameter；
Mission Success condition including each basic task, mission effectiveness assessment number of run, and to basic task serial number, comment
Estimative figure, Mission Success count, mission failure counts and carries out initial zero setting；
2) count is incremented for assessment, calls the basic task of serial number 1, judges that basic task is single dress task, subsystem task or connection
Close system task；According to single dress task equipment Safeguard characteristic evaluation model, the subsystem task equipment Safeguard characteristic evaluation of foundation
Model or association system equipment Safeguard characteristic evaluation model；The equipment Safeguard characteristic evaluation for carrying out basic task obtains assessment knot
Fruit；
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, stops this assessment,
It 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, stops this
2) secondary assessment returns；
5) equipment Safeguard characteristic evaluation and assessment result is carried out according to basic task type to judge, if it is determined that basic task at
Function then continues to carry out type judgement to basic task in order, ensures characteristic evaluation and assessment result judgement, until arriving last one
A basic task assessment result is Mission Success, then Mission Success counter carries out a Mission Success counting, terminates this and comments
Estimate, returns 2)；If it is determined that basic task is unsuccessful, then task failure counter carries out a mission failure counting, stops this
2) secondary assessment returns；
6) until assessment count down to the number of run of setting, stop assessment, statistics task success count value and mission failure count
Value carries out the mission effectiveness assessment of whole space mission.
9. equipment Safeguard method of evaluating characteristic according to claim 8, which is characterized in that the basic task success conditions
For the availability of basic task assessment result is more than availability threshold value and mission effectiveness is more than mission effectiveness threshold value, and is being set
The task amount completed in the fixed basic task deadline reaches task amount threshold value.
10. equipment Safeguard method of evaluating characteristic according to claim 8, which is characterized in that next basic task
Can the condition that smoothly start be that the task rotates into probability PiStart probability threshold value greater than smooth.
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