Active control of multi-input hydraulic journal bearing system

13th International Conference on Motion and Vibration Control; 12th International Conference on Recent Advances in Structural Dynamics

Chuang, Jen-Chen^1 ; Chen, Chi-Yin^1 ; Tu, Jia-Ying^1

Advanced Control and Dynamic Test Laboratory (ACDTLab), Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu

300, Taiwan^1

关键词: Active flow control;    Hydrostatic journal bearing;    Identification techniques;    Journal bearing systems;    Proportional pressure valve;    State feedback controller;    State-feedback designs;    Unbalance response;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/744/1/012062/pdf
DOI  :  10.1088/1742-6596/744/1/012062

来源: IOP

【 摘 要 】

Because of the advantages of high accuracy, high capacity, and low friction, the development of hydrostatic bearing for machine tool receives significant attention in the last decades. The mechanics and mechanical design of hydrostatic journal bearing with capillary restrictors has been discussed in literature. However, pragmatically, the undesired loading effects of cutting force tend to result in resonance and instability of the rotor and damage the shaft during operation. Therefore, multi-input, active flow control using state feedback design is proposed in this paper. To this purpose, the proportional pressure valves are added to the hydraulic system as active control devices, and the linearised models of the bearing and valve are discussed and identified. Simulation and experimental work is conducted to verify the proposed active control and parameter identification techniques. The results show that the unbalance responses of the rotor are reduced by the proposed state feedback controller, which is able to regulate the flow pressure effectively, thus enhancing the stability and accuracy of the hydraulic journal bearing.