STUDY ON FEED FORWARD-FEEDBACK COMPOUND CONTROL FOR HIGHTECH PLATFORM
This paper first designs a three-storey building model and a multi-degree-of-freedom high-tech platform which used air springs as passive vibration isolation elements and giant magnetostrictive actuators as active vibration isolation elements. For this high-tech platform, a compound controller with feed forward and feedback compensators is designed. For making up the property of time lag of feedback control, the control system take feed forward control as the primary controller, while feedback control as the compensator. Among the vibrational disturbance of the high-tech platform received, the disturbance of ground motion can be measured, which we regard as the input and adopt fuzzy control as feed forward control; at the same time measure the dynamical response of the reference model, adopt neural network control as feedback control. We take the sum of the output of feed forward controller and feedback controller as the total output U. Fuzzy feed forward control can not only make up the disfigurement of badly real-time property of neural network control, but also avoid the question of accessional disturbance that commonly feed forward control may bring. The results show that the developed compound controller has good isolation performance and better real-time property if the controller is properly designed.
High-tech platform Feed forward Feedback Hybrid control
Qin Huang Hong-Jun Liu
Department of Urban and Civil Engineering,Harbin Institute of Technology, Shenzhen Graduate School, Department of Urban and Civil Engineering, Harbin Institute of Technology, Shenzhen Graduate School,
国际会议
第十届国际结构工程青年学者研讨会(The Tenth International Symposium on Structural Engineering for Young Experts)
长沙
英文
1248-1254
2008-10-19（万方平台首次上网日期，不代表论文的发表时间）