Fault-tolerant anti-interference control method for multisource interference system

Abstract

The invention relates to a fault-tolerant anti-interference control method for a multisource interference system. Aiming at the multisource interference system containing time-varying faults, modeling interference and non-modeling random interference, a fault-tolerant anti-interference controller is designed. The fault-tolerant anti-interference control method comprises the following steps of: firstly, designing a fault diagnosis observer to estimate and counteract the time-varying faults in the system; secondly, designing an interference observer to estimate and counteract the modeling interference in the multisource interference system; thirdly, designing a robust H infinity state feedback controller to inhibit the non-modeling random interference, fault estimation errors and interference estimation errors in the multisource interference system; and finally, designing the fault-tolerant anti-interference controller based on the fault diagnosis observer, the interference observer and the robust H infinity state feedback controller. The method has the advantages of high anti-interference performance, significant fault-tolerant performance, high working reliability and the like and can be used for altitude control subsystems in the fields of aviation and aerospace.

Description

technical field [0001] The invention relates to a fault-tolerant and anti-jamming control method, in particular to a fault-tolerant and anti-jamming control method for a multi-source jamming system, which can be used for fault diagnosis and fault-tolerant anti-jamming control of a multi-source jamming system, such as satellites, missiles and aircraft, etc. Attitude control subsystem for aerospace systems. Background technique [0002] In recent years, with the development of aerospace technology, the structure and mission requirements of aircraft have become increasingly complex, and the requirements for control accuracy and stability have become higher and higher, resulting in an increasing probability of aircraft failure. For example, some scholars have conducted statistics and analysis on 764 spacecraft successfully launched at home and abroad during 1990-2001, and found that 121 of them had malfunctioned, accounting for 15.8% of the total number of spacecraft. The relia...

AI Technical Summary

Problems solved by technology

However, based on the design of the observer to estimate the fault, the existing method treats the disturbance as a norm bounded quantity for suppression. This processing method has the following two disadvantages: First, all disturbances in the system are regarded as a norm Bounded quantities are suppressed, that is, the interference existing in the system is treated as a whole, and the interference information that can be modeled in the system or the interference information that can be obtained through physical measurement methods are ignored. The system resources are not fully utilized, and it is difficult to achieve high Accurate attitude control; Second, treating all disturbances in the system as norm-bounded quantities for suppression will inevitably increase the conservatism of the system, and it is also difficult to achieve high-precision attitude control

Images