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Electro-hydraulic servo system adaptive state constraint control method based on interference compensation

An electro-hydraulic servo system, state-constrained technology, used in adaptive control, comprehensive factory control, general control system, etc.

Active Publication Date: 2020-02-14
ANHUI UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

In particular, adaptive robust control has been applied to a variety of engineering practices. Although they have achieved excellent tracking performance, this high-precision control performance may be achieved through a large feedback gain.

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  • Electro-hydraulic servo system adaptive state constraint control method based on interference compensation
  • Electro-hydraulic servo system adaptive state constraint control method based on interference compensation
  • Electro-hydraulic servo system adaptive state constraint control method based on interference compensation

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Embodiment Construction

[0104] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0105] The present invention provides a technical solution: an adaptive state-constrained control method for an electro-hydraulic servo system based on disturbance compensation, comprising the following steps:

[0106] Step 1. According to the characteristics of the double-rod hydraulic cylinder servo system, establish a double-rod hydraulic cylinder servo system model;

[0107] Step 2. Construct the expansion state observer of the electro-hydraulic servo system base...

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Abstract

The invention discloses an electro-hydraulic servo system adaptive state constraint control method based on interference compensation in the technical field of electro-hydraulic servo control. The method comprises the steps of: for the characteristics of a valve-controlled double-rod hydraulic cylinder position servo system, establishing a valve-controlled double-rod hydraulic cylinder position servo system model; designing an electro-hydraulic servo system adaptive constraint controller based on interference compensation to perform estimation of system interference and be used for design of the controller. The electro-hydraulic servo system adaptive state constraint control method effectively solves the problem of uncertainty and nonlinearity of an electro-hydraulic servo system, greatlyreduces the feedback gain of the system, adopts the adaptive controller to approximate the system parameters so as to greatly weaken the influence of parameter uncertainty on the system, takes the consideration of the system state constraint problem to constrain the state of the system by designing an obstacle Lyapunov function so as to ensure that the position output of the double-outlet-rod hydraulic cylinder servo system can accurately track an expected position instruction. The design of the controller is simplified, and application in engineering practice is better facilitated.

Description

technical field [0001] The invention relates to the technical field of electro-hydraulic servo control, in particular to an adaptive state constraint control method of an electro-hydraulic servo system based on disturbance compensation. Background technique [0002] The electro-hydraulic servo system has high control precision, large output power, flexible signal processing, and easy feedback of various parameters. Therefore, it is most suitable for occasions with high power and quality. Its application has spread throughout various fields of national defense and industry, such as aircraft Control of ship steering gear, control of radar and artillery, position control of machine tool table, plate thickness control of strip mill, electrode position control of electric furnace smelting, pressure control of material testing machine and other testing machines, etc. However, it is not easy to design a high-performance controller for an electro-hydraulic servo system. Because the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
CPCG05B13/042Y02P90/02
Inventor 徐张宝刘庆运胡晓磊孙船斌蔡瑞冯德伟
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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