文章摘要
Zhao Jianhua (赵建华)* ** ***,Chen Tao**,Han Fang**,Gao Dianrong**,Du Guojun*.[J].高技术通讯(英文),2020,(3):299~305
Research on robust control strategy of single DOF supporting system of MLDSB based on H∞ mixed-sensitivity Method
  
DOI:doi:10.3772/j.issn.1006-6748.2020.03.008
中文关键词: 
英文关键词: magnetic-liquid double suspension bearing (MLDSB), single degree of freedom (DOF) supporting system, H∞ mixed-sensitivity method, state feedback controller, robust stability
基金项目:
Author NameAffiliation
Zhao Jianhua (赵建华)* ** *** (*College of Civil Engineering and Mechanics, Yanshan University, Qinhuangdao 066004, P.R.China) (**Fluid Power Transmission and Control Laboratory, Yanshan University, Qinhuangdao 066004, P.R.China) (***Jiangsu Provincial Key Laboratory of Advanced Manufacture and Process for Marine Mechanical Equipment, Zhenjiang 212003, P.R.China) 
Chen Tao** (**Fluid Power Transmission and Control Laboratory, Yanshan University, Qinhuangdao 066004, P.R.China) 
Han Fang** (**Fluid Power Transmission and Control Laboratory, Yanshan University, Qinhuangdao 066004, P.R.China) 
Gao Dianrong** (**Fluid Power Transmission and Control Laboratory, Yanshan University, Qinhuangdao 066004, P.R.China) 
Du Guojun* (*College of Civil Engineering and Mechanics, Yanshan University, Qinhuangdao 066004, P.R.China) 
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中文摘要:
      
英文摘要:
      Because of hydraulic-electromagnetic double supporting forms, the supporting capacity and stiffness of magnetic-liquid double suspension bearing (MLDSB) can be improved sharply and then it is more suitable for medium speed, heavy load and frequent-starting occasions. Due to the multiple uncertainty, such as the coupling, the unmodeled dynamics, the parameter perturbation and the external disturbance perturbation, the robust stability and stiffness of control system of MLDSB are hard to meet the design requirements. Firstly, the structural features and the regulation mechanisms of MLDSB are presented and the radial 4-DOF kinetic equations are established. Secondly, the influence factors of the control system’s coupling on unbalanced vibration caused by the deviation of the rotor center of mass are revealed, and then the weighting function of suppressing the unbalanced vibration can be obtained. Finally, H∞ controller of MLDSB is designed with H∞ mixed-sensitivity method, and the control performances of H∞ controller is compared with the state feedback controller. The simulation results show that single degree of freedom (DOF) supporting system of MLDSB with H∞ controller has good robust stability, stiffness and the ability to suppress unbalanced external disturbances. This study can provide the theoretical reference for stabilized suspension and control of MLDSB.
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