Ultra-precision lathe motion control method based on fuzzy PID self-tuning calculation

A technology of motion control and self-tuning, which is applied in the field of high-precision control of moving parts and ultra-precision cutting processing, can solve the problems of insufficient precision of ultra-precision cutting, lack of self-tuning, and limited control effect, so as to improve the performance of ultra-precision cutting. Accuracy, optimized output, and the effect of improving positioning accuracy and response speed

Active Publication Date: 2021-03-12
INST OF MACHINERY MFG TECH CHINA ACAD OF ENG PHYSICS
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Problems solved by technology

[0003] At present, the mainstream control algorithm applied to the guide rail of ultra-precision diamond lathe is based on the PID control algorithm of motion controllers such as UMAC. However, there are time-varying factors such as nonlinearity in ultra-precision machining, which makes it difficult for traditional PID control to adapt to changes in motion position and load disturbance. Parameter perturbation and cr

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  • Ultra-precision lathe motion control method based on fuzzy PID self-tuning calculation
  • Ultra-precision lathe motion control method based on fuzzy PID self-tuning calculation
  • Ultra-precision lathe motion control method based on fuzzy PID self-tuning calculation

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[0040] Example

[0041] This embodiment is provided based on fuzzy PID self-intensive calculation of superficial lathe motion control methods comprising the steps of:

[0042] Taking the straight line motion guide rail of the lathe is the controlled object, the preset position information and the actual location information of the linear motion guide are obtained, and the fuzzy PID control algorithm calculates control according to the error value of the preset position and the actual position. The output is input to the control output to the control system to control the linear motion rail movement, which is the main step of controlling its motion based on the fuzzy PID algorithm based on a linear motion guide. Although the existing fuzzy PID control algorithm can improve the system a certain degree of adaptability, the control effect of fuzzy PID always depends on the selection of the initial PID parameter and the identification of the field, otherwise the final effect is not ide...

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Abstract

The invention discloses an ultra-precision lathe motion control method based on fuzzy PID self-tuning calculation, and relates to the technical field of ultra-precision cutting processing. The methodmainly comprises the following steps: acquiring preset position information and actual position information of a linear motion guide rail of a lathe as a controlled object; and calculating a control output quantity by adopting a fuzzy PID control algorithm according to the deviation value between the preset position and the actual position and the change rate of the deviation value, and inputtingthe control output quantity into a control system to control the linear motion guide rail to move. A discourse domain parameter self-tuning method is adopted in fuzzy PID control and introduced into the fuzzy PID control, autonomous learning can be achieved, the static and dynamic performance of the ultra-precision lathe guide rail control system is improved, and then the purpose of improving theultra-precision cutting machining precision is achieved.

Description

technical field [0001] The invention relates to the technical field of ultra-precision cutting and processing, and more to the technical field of high-precision control of moving parts. Specifically, it relates to a motion control method for an ultra-precision lathe based on fuzzy PID self-tuning calculation. Background technique [0002] Ultra-precision diamond turning (single point diamond turing, SPDT) is an important equipment in ultra-precision machining. It is often used to process optical components with complex surface shapes or special surface shape requirements, such as gyroscopes for defense cutting-edge products, high-precision flat mirrors / lenses , precision instruments and various components in high-power laser systems. Since the surface topography of such parts is directly related to the relative motion between the tool and the workpiece, the high surface accuracy and high surface quality of such parts require the servo control system of the ultra-precision di...

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Application Information

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IPC IPC(8): G05B19/408
CPCG05B19/4086G05B2219/35356
Inventor 李兆中岳晓斌孙守利阳红张敏刘有海戴晓静杨光伟尹承真姜忠
Owner INST OF MACHINERY MFG TECH CHINA ACAD OF ENG PHYSICS
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