Neural network fractional order integral sliding mode control method for hydraulic position servo system

A servo system and neural network technology, applied in the field of hydraulic position servo system neural network fractional-order integral sliding mode control, can solve the problems of inaccurate hydraulic control system model, difficult accurate tracking control of hydraulic position servo system, etc., and achieve good tracking effect. , the effect of high control precision

Active Publication Date: 2020-06-16
XIAN UNIV OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a neural network fractional order integral sliding mode control method for a hydraulic position servo system, which solves the difficulty in realizing the hydraulic position servo in the prior art under unfavorable conditions such as inaccurate hydraulic control system models and inaccurate zero points of proportional valves. The problem of precise tracking control of the system

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  • Neural network fractional order integral sliding mode control method for hydraulic position servo system
  • Neural network fractional order integral sliding mode control method for hydraulic position servo system
  • Neural network fractional order integral sliding mode control method for hydraulic position servo system

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Embodiment Construction

[0015] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0016] The neural network fractional order integral sliding mode control method of the hydraulic position servo system of the present invention is specifically implemented according to the following steps:

[0017] Step 1. Perform hydraulic position servo system modeling and model linearization,

[0018] refer to figure 1 , the working principle of the controlled hydraulic position servo system that the method of the present invention relies on is that the piston 1 of the asymmetrical hydraulic cylinder 3 of the control object is fixedly connected with the load 2, and the piston 1 is also in corresponding contact with the displacement sensor 4, and the displacement sensor 4 The output signal is sent to the computer 6 through the A / D conversion 9; the proportional valve 5 is a three-position four-way valve, and the hydraulic chamber A side an...

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Abstract

The invention discloses a neural network fractional order integral sliding mode control method for a hydraulic position servo system. The neural network fractional order integral sliding mode controlmethod is implemented according to the following steps of: step 1, performing hydraulic position servo system modeling and model linearization; step 2, designing a fractional order integral sliding mode controller of the hydraulic position servo system; and step 3, estimating an uncertain function in a model by adopting a neural network. According to the neural network fractional order integral sliding mode control method, effective control can be implemented without knowing system model information and accurate zero point of a proportional valve; and compared with a traditional sliding mode control method, a better tracking effect and higher control precision can be achieved.

Description

technical field [0001] The invention belongs to the technical field of hydraulic servo tracking control, and relates to a neural network fractional order integral sliding mode control method of a hydraulic position servo system. Background technique [0002] The hydraulic servo system has the advantages of fast response speed and strong carrying capacity, and is currently widely used in the fields of robotics, aerospace and defense industries. In recent years, with the improvement of the performance of hydraulic components and the development of high-speed computer control systems, the requirements for the control performance of hydraulic servo systems in practical applications are also getting higher and higher. However, due to manufacturing reasons and time-varying working conditions, it is difficult to establish an accurate mathematical model of the system; at the same time, the hydraulic servo system has system nonlinearity, inaccurate zero point of the proportional valv...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 任海鹏王璇李洁
Owner XIAN UNIV OF TECH
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