Spacecraft reconfigurability evaluation method

Abstract

The invention discloses a spacecraft reconfigurability evaluation method, belongs to the overall technical field of spacecraft, and comprehensively considers time constraint, performance reduction degree, reconstruction capability distribution in each direction and reliability reduction influence. The method comprises the following steps: firstly, giving an evaluation index form based on an integral quadratic function; secondly, conducting detailed design on a weight matrix in the indexes, and introducing the reconstruction capacity distribution situation of the system and the reliability reduction influence caused by faults into the evaluation indexes; and finally, verifying the effectiveness and correctness of the evaluation method provided by the invention through a simulation example.According to the method, the limitation constraint problems of limited energy, limited time, interference influence and the like are comprehensively considered, the method is closer to the actual engineering background, and designers can know the real reconstruction capacity of the system under the constraint of the actual performance.

Description

technical field [0001] The invention relates to a method for evaluating the reconfigurability of a spacecraft, which belongs to the general technical field of spacecraft. Background technique [0002] For the problem of spacecraft reconfiguration, whether it is to optimize the reconfigurability of the system at the early stage of design, or to evaluate the online performance of the system in the fault stage, a quantitative index that can describe the reconfiguration capability of the system is required as the basis for design and evaluation. In order to make quantitative judgments on whether the redundancy allocation is reasonable, whether the reconstruction measures are effective, and whether the faulty system can be reconfigured. [0003] Because the actuator is in the running state for a long time, it is easy to wear and age, and the faults are especially frequent. Therefore, it is of great significance to study the system reconfigurability under the actuator fault condit...

AI Technical Summary

Problems solved by technology

Otherwise, even if the faulty system is still controllable, it may lose its actual reconfigurability due to the high cost and long time required for reconfiguration

[0005] (2) It is difficult to reflect the rationality of the distribution of system reconfiguration potential and it is impossible to directly compare different systems

However, since the expected reconfiguration capabilities of different systems and different directions of the same system are not the same, the smallest is not necessarily the weakest. Therefore, the above method cannot reflect the rationality of the distribution of system reconfiguration potential, and also No direct comparison between different systems

Based on such evaluation indicators, the effect of optimizing the design of the system is limited, and there may be excess redundancy in some directions, resulting in the improvement of quality and cost and the waste of available resources

[0006] (3) The impact of reliability decline on system reconfigurability is not introduced into the evaluation index

Therefore, without considering the influence of reliability, even if the faulty actuator has sufficient residual controllability, it may not be able to successfully complete the entire reconstruction process with high reliability.

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