Advances in Manufacturing ›› 2024, Vol. 12 ›› Issue (1): 33-60.doi: 10.1007/s40436-023-00463-z

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Study on 6-DOF active vibration-isolation system of the ultra-precision turning lathe based on GA-BP-PID control for dynamic loads

Bo Wang1, Zhong Jiang2, Pei-Da Hu1   

  1. 1. Department of Precision Instrument, Tsinghua University, Beijing, 100084, People's Republic of China;
    2. Institute of Machinery Manufacturing Technology, China Academy of Engineering Physics, Mianyang, 621900, Sichuan, People's Republic of China
  • Received:2023-02-09 Revised:2023-05-02 Published:2024-03-14
  • Contact: Zhong Jiang,E-mail:jiangzhong1989@163.com E-mail:jiangzhong1989@163.com
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Grant Nos. 62073184, 52105490).

Abstract: The vibration disturbance from an external environment affects the machining accuracy of ultra-precision machining equipment. Most active vibration-isolation systems (AVIS) have been developed based on static loads. When a vibration-isolation load changes dynamically during ultra-precision turning lathe machining, the system parameters change, and the efficiency of the active vibration-isolation system based on the traditional control strategy deteriorates. To solve this problem, this paper proposes a vibration-isolation control strategy based on a genetic algorithm-back propagation neural network-PID control (GA-BP-PID), which can automatically adjust the control parameters according to the machining conditions. Vibration-isolation simulations and experiments based on passive vibration isolation, a PID algorithm, and the GA-BP-PID algorithm under dynamic load machining conditions were conducted. The experimental results demonstrated that the active vibration-isolation control strategy designed in this study could effectively attenuate vibration disturbances in the external environment under dynamic load conditions. This design is reasonable and feasible.

The full text can be downloaded at https://link.springer.com/article/10.1007/s40436-023-00463-z

Key words: Ultra-precision diamond turning lathe, Active vibration isolation, Six degrees of freedom, Dynamic load, Genetic algorithm-back propagation neural network-PID (GA-BP-PID) control