Hardware-in-loop simulation on hydrostatic thrust bearing worktable pose  

作　　者：韩桂华 邵俊鹏 秦柏 董玉红 

机构地区：[1]Mechanical Power Engineering College, Harbin University of Science and Technology

出　　处：《Journal of Central South University》2008年第S2期250-256,共7页中南大学学报（英文版）

基　　金：Project(20050214001) supported by Doctor Foundation of Education Ministry of China;Project(GC05A512) and supported by the Program of Heilongjiang Province Science and Technology, China;Project(zjg0702-01) supported by the Natural Science Foundation of Heilongjiang Province, China

摘　　要：A controllable hydrostatic thrust bearing was presented to improve rigidity. The bearing worktable poses were controlled by coupling oilfilm thickness of four controllable chambers. The chamber flow can be regulated by electro hydraulic servo valve-control variable pump according to the surface roughness, load, cutting force, and thermal effects of worktable. The mathematical models of the controllable chamber flow, servo variable mechanism and controller were built. The pose control model was established, which contained the kinematics positive and negative solution and control strategy of feedforward and hydraulic cylinder position feedback. Hardware-in-loop simulation experiment was carried out on the electro hydraulic servo test bench by means of the non-linear relation of film thickness and hydraulic cylinder displacement. Hardware-in-loop simulation experiment results show that the controllable bearings exhibit high oilfilm rigidity, the rising time is 0.24 s and the maximum overshoot is 2.23%, and can be applied in high precision heavy machine tool.A controllable hydrostatic thrust bearing was presented to improve rigidity. The bearing worktable poses were controlled by coupling oilfilm thickness of four controllable chambers. The chamber flow can be regulated by electro hydraulic servo valve-control variable pump according to the surface roughness, load, cutting force, and thermal effects of worktable. The mathematical models of the controllable chamber flow, servo variable mechanism and controller were built. The pose control model was established, which contained the kinematics positive and negative solution and control strategy of feedforward and hydraulic cylinder position feedback. Hardware-in-loop simulation experiment was carried out on the electro hydraulic servo test bench by means of the non-linear relation of film thickness and hydraulic cylinder displacement. Hardware-in-loop simulation experiment results show that the controllable bearings exhibit high oilfilm rigidity, the rising time is 0.24 s and the maximum overshoot is 2.23%, and can be applied in high precision heavy machine tool.

关 键 词：HYDROSTATIC THRUST bearing HARDWARE-IN-LOOP simulation worktable POSE CONTROLLABLE CHAMBER 

分 类 号：TH133.3[机械工程—机械制造及自动化]