Fault detection and reconstruction system and method based on dynamic-static hybrid strategy

Abstract

The invention relates to a fault detection and reconstruction system and method based on a dynamic-static hybrid strategy. Firstly, according to the current work mode of a control system, the fault detector and sensor configuration schemes are subjected to combined optimization; on the premise of ensuring the fault detection performance, the system energy consumption is possibly reduced; then, when the fault is detected, the real-time accurate recognition on the fault type is realized through solving the multi-model selection problem; finally, according to the recognized fault type, through the design of the reasonable switching control scheme, the control allocation and the system sterilization can be completed; the autonomous fault detection and reconstitution of the control system under various possible fault conditions can be realized. By using the technical scheme, the static fault monitoring and the dynamic fault type recognition and control system reconstruction are combined. Compared with a conventional fault detection and fault-tolerant control scheme, various kinds of potential faults can be effectively treated; the real-time performance is improved; the energy consumption is reduced; the system and the method can be applied to the high-reliability control problem of control objects of astrovehicles, mechano-electronics, chemical engineering and the like.

Description

technical field [0001] The invention relates to a fault detection and reconfiguration system and method based on a dynamic and static hybrid strategy, which is applied to the field of high reliability control of control objects such as spacecraft, electromechanical, and chemical industries. Background technique [0002] In recent years, with the development of industrial technology, the control tasks involved in the fields of spacecraft, electromechanical, and chemical industry have become increasingly complex, and the scale of the control system has become increasingly large. The factors that may cause failures in the system have increased significantly, and the types of failures have become increasingly diverse. The above trends put forward higher requirements for the reliability of the control system, and the traditional fault detection and fault-tolerant control methods have encountered new challenges. Taking the spacecraft attitude control system as an example, the poss...

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Problems solved by technology

[0005] The problem solved by the technology of the present invention is: for the existing fault detection and fault-tolerant control method, the sensor configuration is not considered in the fault monitoring process, resulting in waste of sensor resources; and the failure model information is not fully utilized, and the system reconfiguration scheme has conservative problems , to overcome the deficiencies of the prior art, to provide a fault detection and reconstruction system and method based on a dynamic and static hybrid strategy, to solve the fault monitoring, detection, identification, reconstruction and closed-loop system stabilization of the control system in the case of multiple possible faults To solve the problem, while reducing the energy consumption of the sensor, ensure the reliability and adaptability of the control system

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