Optimal scheme selection method for satellite control system on basis of reconfigurable constraints of failures

Abstract

The invention provides an optimal scheme selection method for a satellite control system on the basis of reconfigurable constraints of failures. The method comprises the following steps: (1), providing a minimum feasible configuration set CS according to the observability and the controllability of the satellite control system; (2), performing a reconfigurable design on the satellite control system in response to the minimum feasible configuration set CS, and providing a feasible alternative design-scheme set DS on the basis of reconfigurable index constraints; (3), comprehensively considering the resource constraints of the system, and selecting a design scheme with optimal comprehensive properties from the alternative design-scheme set DS. According to the optimal scheme selection method disclosed by the invention, the reconstitution capability and the resource constraints of the satellite control system in the designing stage can be taken into account, and matched sensors and the type and the number of actuators are provided, so that the optimization of the comprehensive properties of the system under the condition of the reconfigurable constraints is satisfied. The optimal scheme selection method disclosed by the invention is simple and definite, and is suitable for the type selection and the configuration designs of sensors and actuators for the satellite control system in the development stage.

Description

technical field [0001] The invention belongs to the field of aerospace technology, and relates to a scheme optimization method of a satellite control system based on fault reconfigurability constraints. Background technique [0002] With the development of aerospace technology, people put forward higher and higher requirements for the reliability, safety and working life of satellites. Since the fault diagnosis and system reconfiguration technology can detect and locate the fault in time after the system fault, and minimize the impact of the fault through system reconfiguration, it has become an important technology to overcome the inherent reliability of the product from the system level and improve the reliability and reliability of satellite operation. effective means of prolonging life. However, in recent years, there have been many serious incidents at home and abroad that satellites have completely failed at the early stage of their lifespan or even just in orbit, whi...

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Problems solved by technology

Some scholars regard fault reconfigurability as an inherent characteristic of the system, and analyze and evaluate the reconfiguration capability of the LTI system from the perspective of the singular value of the controllable and observable Graham matrix, but this method does not consider the components of the system. configuration, not suitable for complex systems with a lot of redundancy like satellite control systems

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