A Fault-Tolerant Control Method for Missile Multi-Drive State Actuator Faults

Abstract

The invention provides a fault-tolerant control method for the failure of the actuator in multiple driving states of the missile. For general wingless missiles, the dynamic model of the missile is constructed under the condition of satisfying the freezing coefficient and the small disturbance assumption, and the different driving states of the missile actuator are repeated. Finally, according to the designed control strategy, the control system adopts the adaptive fault mode recognition factor to identify different fault modes and switch control strategies to complete the fault-tolerant control of the control system. The invention applies the self-adaptive failure mode identification factor, can effectively identify different failure modes of the missile actuator, and selects a corresponding control strategy to reconfigure the control system; a single control system design can solve the different failure modes of the missile actuator, and deal with system input drive state changed.

Description

technical field [0001] The invention belongs to the field of aircraft dynamics and control, and in particular relates to a fault-tolerant control method for missile actuator failures. Background technique [0002] The actuator is the final destination of the control system to complete the control behavior. The failure of the actuator will lead to a serious decline in the performance of the control system, and even the system is unstable or has a serious failure. Therefore, the handling of the failure of the actuator is extremely important for the safety and reliability of the control system. [0003] At present, the fault-tolerant control methods of actuator faults that do not change the input driving state of the control system are mainly divided into two categories. One is the passive fault-tolerant control method, whose research was mainly concentrated in the 1990s, usually based on robust control theory, by designing a fixed controller to provide sufficient stability ma...

AI Technical Summary

Problems solved by technology

Although the active fault-tolerant control method can effectively identify and deal with general actuator faults, for multiple actuator faults that can cause changes in the input drive state of the control system, the active fault-tolerant control method cannot identify the failure mode and cannot reconstruct the control system. , it is difficult to apply to the fault-tolerant control of this type of actuator failure

The sliding mode variable structure control method has a single approach law design for the failure of the actuator, and the change of the system input driving state will directly lead to the failure of the control system, and its chattering characteristics will also affect the control performance; although the predictive control method can identify complex system actuators failure mode, but there is no effective reconstruction processing mechanism for system input drive state changes; adaptive control methods can identify general faults of multiple actuators and can effectively reconfigure the control system, but cannot deal with failure modes of underactuated actuators; neural network / The fuzzy logic intelligent control method is quite difficult to completely model the faults of the control system and actuators, and requires a large number of samples for training. It can only deal with the fault modes contained in the learning samples. At present, it is not suitable for solving the faults of actuators in complex systems. Complete

The disturbance-based estimation control method is similar to the predictive control method, and the control system cannot be effectively reconfigured under the condition of multiple actuator failures where the system driving state changes.

[0005] To sum up, for the failure of multiple actuators that can cause the input drive state of the control system to change, the existing technology still lacks an effective solution

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