Robust prediction fault-tolerant control method for executor faults of time-delay uncertain system

Abstract

The invention discloses a robust prediction fault-tolerant control method for executor faults of a time-delay uncertain system. Considering the parameter uncertainty and executor failure faults of a linear discrete time-delay system, linear matrix inequality and robust prediction control are utilized to provide the robust prediction fault-tolerant control method. According to a system model, an augmentation state model with output errors is established, and the control efficiency is improved. Based on a prediction control theory, a robust prediction control algorithm is proposed, and proportion factors and time-delay control items of a fault model are added in state feedback control; it is conductive to that 'minimum-maximum' optimization problems are converted into minimization problems through the linear matrix inequality, an optimal control law is obtained, and the stability of the system is ensured. By adopting the method, the control precision and robustness are effectively and systematically controlled by establishing the new state model and the improved state feedback control law. The robust prediction fault-tolerant control method is used for passive fault-tolerant controlof a time-delay uncertain system with executor failure faults.

Description

technical field [0001] The invention relates to a robust predictive fault-tolerant control method for actuator faults of time-delay uncertain systems, and belongs to the technical field of fault-tolerant control of time-delay uncertain systems. Background technique [0002] No matter how fast technology develops, safety is always one of the goals people pursue. And as modern industrial systems, power grid systems, aerospace and other systems become larger and more complex in structure, people have higher and higher requirements for system reliability and security. In the event of failure, it may cause huge economic or personnel losses. In addition, different degrees of time-lag phenomena are common in various practical control systems, that is, the change of the system state not only depends on the state value at the current moment, but also is affected by the state value at the past moment, and the time-lag will destroy system stability and degrade system performance. Du...

AI Technical Summary

Problems solved by technology

Su Chengli et al. proposed a class of robust predictive control for multiple time-delay uncertain systems; Ping Xubin et al. studied the dynamic output feedback robust model predictive control method for systems with multiple uncertainties and bounded noise; Liu Xiaohua and others studied the robust predictive control problem for uncertain generalized systems with both state and input time delays, but these did not take into account the failure of the system

Images