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A variable universe fuzzy pid double hydraulic cylinder electro-hydraulic servo synchronous control method

An electro-hydraulic servo and synchronous control technology, applied in electric controllers, controllers with specific characteristics, etc., can solve the problem that the scale factor and quantization factor of the fuzzy controller cannot be adjusted adaptively, so as to increase the number and improve the control accuracy. Effect

Active Publication Date: 2019-10-01
CHANGCHUN UNIV OF TECH +1
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Problems solved by technology

[0005] The object of the present invention is to provide a variable universe fuzzy PID control method for synchronously controlling dual-channel vertical hydraulic cylinders in an electro-hydraulic servo synchronous drive system, so as to solve the problem of synchronous control of dual-channel hydraulic cylinders and overcome fuzzy control The disadvantage that the scale factor and quantization factor of the device cannot be adjusted adaptively

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  • A variable universe fuzzy pid double hydraulic cylinder electro-hydraulic servo synchronous control method
  • A variable universe fuzzy pid double hydraulic cylinder electro-hydraulic servo synchronous control method
  • A variable universe fuzzy pid double hydraulic cylinder electro-hydraulic servo synchronous control method

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] figure 1 It is the schematic diagram of variable universe fuzzy PID control, which includes input signal rin, universe adjustment module, fuzzy controller module, PID parameter adjustment module, actuator (hydraulic cylinder), sensor (displacement, force), system output yout ; The input signal acts on the actuator through the PID parameter adjustment module, and the obtained system output is converted into the same amount as the input signal through the sensor, and compared with the input signal, and the error signal is used as an input variable, which is input to the theory The domain adjustment module acts on the PID parameter adjustment module through the fuzzy controller module to realize online adjustment of PID parameters and closed-loop control of the system.

[0031] figure 2 It is a Simulink-based fuzzy PID synchronous control model diagram of dual h...

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Abstract

The invention belongs to the technical field of automatic control and relates to a variable-domain fuzzy PID synchronous control method of an electro-hydraulic servo synchronous driving system. The method comprises the following steps: designing a domain expansion factor which can be adaptively adjusted according to input and output variables; selecting different input variables for a free channel and an adjustment channel and selecting [delta]KP and [delta]KI as output variables; performing fuzzy processing on the input variables; selecting a triangular membership function at the zero point of the domain, and selecting a Gaussian membership function near the boundary of the fuzzy domain; creating a fuzzy rule table; performing fuzzy reasoning with a Mamdani rule; and performing clarification on fuzzy quantity, outputting the fuzzy quantity to the controlled object for control. Compared with a traditional variable-domain fuzzy PID controller, the method has good dynamic coordination, high control precision and high versatility.

Description

technical field [0001] The invention belongs to the technical field of automation control, and relates to a variable domain fuzzy PID synchronous control method of an electro-hydraulic servo synchronous drive system. Background technique [0002] With the rapid development of my country's rail vehicle industry and the improvement of operating speed, people have higher requirements for the safety and comfort of riding vehicles. On the premise of ensuring operating safety, improving the operating quality of vehicles has become the current Top issues in vehicle design, manufacturing and line construction and maintenance. The wheel / rail contact relationship and the interaction between the vehicle / line directly affect the running quality of the vehicle. In order to study the wheel / rail contact relationship and the interaction between the vehicle / line, the force measuring wheel set is used as a dynamic The performance of the core sensor in the experimental research directly affect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B11/42
Inventor 张邦成周东华李永生高嵩庞会文林健乔王子建徐燃
Owner CHANGCHUN UNIV OF TECH
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