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Sliding mode prediction fault-tolerant control method for multi-time-lag system with sensor faults

A sensor fault, fault-tolerant control technology, applied in adaptive control, general control system, control/regulation system, etc., can solve the problem of high frequency of sensor failure, improve robustness, weaken sliding mode chattering, improve The effect of controlling performance

Pending Publication Date: 2020-09-29
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

However, the frequency of sensor failures in the control system is very high, which brings many problems and hidden dangers to engineering applications and teaching experiments

Method used

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  • Sliding mode prediction fault-tolerant control method for multi-time-lag system with sensor faults
  • Sliding mode prediction fault-tolerant control method for multi-time-lag system with sensor faults
  • Sliding mode prediction fault-tolerant control method for multi-time-lag system with sensor faults

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Embodiment Construction

[0086] The present invention will be further explained below in conjunction with the accompanying drawings.

[0087] Such as figure 1 As shown, the linear sliding mode surface designed by the commonly used sliding mode prediction algorithm is prone to instability in the approach process, and a global sliding mode switching function is designed to avoid instability in the approach process and ensure global robustness. Considering the sliding mode chattering problem existing in the sliding mode prediction algorithm, the reference trajectory of the power function is designed. The reference trajectory of the power function has an excellent effect on weakening chattering, and can greatly weaken the chattering peak value; and, Due to the presence of multiple time lags, sensor failures and uncertainties, compensation terms for failures and uncertainties are designed in the reference trajectory. In solving the control law, an improved whale optimization algorithm is designed for iter...

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Abstract

The invention discloses a novel sliding mode prediction fault-tolerant control algorithm for a multi-time-lag system with sensor faults. The sliding mode prediction fault-tolerant control method basedon an improved whale optimization algorithm is designed to overcome a fault-tolerant control problem of a multi-time-lag discrete uncertain system under the condition of sensor faults. A global sliding mode surface is designed as a prediction model to replace a traditional linear sliding mode surface, so that the global robustness of the system is ensured. For sensor faults and sliding mode buffeting, a power function reference trajectory with fault compensation is designed to weaken buffeting and obtain better robust stability. In the rolling optimization process, the improved whale optimization algorithm is designed, the optimization process can be prevented from falling into a local minimum value while high convergence speed and precision are achieved, and the early-maturing convergence problem is solved. The robust fault-tolerant control method is used for robust fault-tolerant control of the multi-time-lag discrete system with sensor faults.

Description

technical field [0001] The invention relates to a sliding mode predictive fault-tolerant control method based on an improved whale optimization algorithm designed for a multi-time-delay system with sensor faults, and belongs to the technical field of robust fault-tolerant control of uncertain discrete control systems. Background technique [0002] In recent years, artificial intelligence technology has developed rapidly, and researchers have also made many innovative achievements and progress in the field of intelligent algorithms. The proposal and application of these intelligent algorithms have greatly enriched people's daily life, brought convenience to human society, and promoted social progress. However, due to frequent use for a long time, smart devices are prone to malfunctions, and these malfunctioning smart devices can cause property damage to people and casualties. Therefore, the fault-tolerant control algorithm emerges at the historic moment and has increasingly ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 杨蒲柳张曦胡旭凯姜斌张芷晴
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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