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

An uncertainty, fault-tolerant control technology, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve problems such as system failures that are not considered

Inactive Publication Date: 2019-03-22
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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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 uncer

Method used

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

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Embodiment Construction

[0061] The present invention will be further explained below in conjunction with the accompanying drawings.

[0062] Such as figure 1 As shown, the robust predictive fault-tolerant control method for actuator faults in time-delay uncertain systems, when the controlled system has time-delay and multiple actuator failures, the robust predictive control method is used to propose a passive fault-tolerant prediction The control method includes the following specific steps:

[0063] Step 1) Obtain the system mathematical model:

[0064] Step 1.1) Consider a discrete model of a general state-delay system, as shown in formula (1):

[0065]

[0066] in, is the state variable of the system, is the control input of the system, is the system output, the constraint condition of system input and output is |u(k)|≤u max and |y(k)|≤y max , where u max =[u max，1 , u max，2 ,...,u max，m ] T , u max，i >0, i=(1,...,m) and y max =[y max，1 ,y max，2 ,...,y max，q ] T ,y max，j >...

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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...

Claims

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042G05B13/048
Inventor 杨蒲疏琪堡王玉霞
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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