Multi-model adaptive reconstruction control method and device for electro-hydraulic position servo system
A technology of electro-hydraulic position servo and control method, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve the problem of limited safety and reliability, not considering component failure, insufficient to ensure work safety, etc. problem, to achieve the effect of improving transient performance, less parameters, and good effect
Pending Publication Date: 2022-04-08
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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However, it does not take into account the failure of components in the electro-hydraulic position servo system, its safety and reliability are limited, and it is not enough to guarantee the safety of work
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[0071] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0072] The multi-model adaptive reconfiguration control method of the electro-hydraulic position servo system of the present invention mainly includes the following steps:
[0073] S1. Construct the fault mathematical model of the electro-hydraulic position servo system according to the fault types of the electro-hydraulic position servo system, and design a reference model;
[0074] Such as figure 1 In the electro-hydraulic position servo system shown, its faults include sensor faults and actuator faults, and the actuator is an electro-hydraulic servo valve. In the following, a faulty electro-hydraulic position servo system is called a faulty system, and a non-faulty electro-hydraulic position servo system is called a non-faulty system.
[0075] The pressure flow equation of the electro-hydraulic servo valve is:
[0076]
[0077] Among...
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The invention discloses a multi-model adaptive reconstruction control method and device for an electro-hydraulic position servo system, and the method comprises the steps: firstly constructing a fault mathematical model of the electro-hydraulic position servo system according to the fault type of the electro-hydraulic position servo system, and designing a reference model; secondly, designing a self-adaptive reconstruction control law, and enabling the output of the fault system to track the output of the reference model so as to compensate the output error of the fault system; then, a combined multi-model set is established according to fault types, and each model is provided with a corresponding independent controller; thirdly, designing a model switching mechanism to perform model matching on the fault system, so that the fault system is automatically switched to a controller with the minimum performance index; the electro-hydraulic position servo system reconstruction method based on multi-model self-adaption can effectively compensate adverse effects generated by component faults, has good robustness and excellent reconstruction capability for faults of a sensor, an actuator and the like, and ensures reliability and safety of the electro-hydraulic position servo system in the whole work task.
Description
technical field [0001] The invention relates to an aviation electromechanical system and a control method thereof, in particular to a multi-model self-adaptive reconfiguration control method and device of an electro-hydraulic position servo system. Background technique [0002] The electro-hydraulic position servo system is a complex control system integrating mechanics, electricity, and hydraulics. It has the advantages of high control precision, fast response speed, and flexible signal processing. The electro-hydraulic position servo system is more and more widely used in aerospace engineering, especially in the rudder control of large aircraft and the control of flight simulators. However, the structure of the electro-hydraulic position servo system is complex, and there are inevitably hidden dangers of component failure. Once one of its components fails, it is easy to trigger a chain reaction, and even cause more serious consequences, and the reliability and security of...
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IPC IPC(8): G05B13/04
Inventor 刘舒畅杨忠张钊周国兴陈爽张小恺
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS