Transactions of Materials and Heat Treatment

Title：Position tracking control on load-sensing for servo hydraulic system

Authors： Xu Wenbin Tan Jianping Zeng Quansheng

Unit： Airforce Aviation Repair Institute of Technology State Key Laboratory of High Performance Complicated Manufacturing

KeyWords： valve-controlled hydraulic system position control load-sensing control PID control sliding mode control

ClassificationCode：TP273

year,vol(issue):pagenumber：2018,43(11):99-104

Abstract：

The asymmetric structure, inherent nonlinearity, obvious operating-condition changes and different external loads under various operating conditions of valve-controlled hydraulic system result in non-linear, hardly-controlling, low response precision and high energy consumption of the hydraulic system characteristics. Therefore, the load-sensing position tracking control model of valve control hydraulic system based on speed regulating and fixed displacement pump was constructed, and the mathematical model was established. On the basis of the discrete PID control, the sliding mode function and feedback control strategy based on feed forward control were designed. The feedback control system consisted of a valve control hydraulic system and a load sensitive control system. Furthermore, the displacement response and pressure output of the system with and without load-sensitive control were compared by experiments. The results show that the load sensitive control can improve the position tracking accuracy and stability of the system,and reduce the energy consumption of the system.

Funds：

湖南省教育厅科学研究项目(16C0016)；国家重点基础研究发展计划(973计划)资助项目(2014CB049405)

许文斌(1977-)，男，硕士，副教授,E-mail：xwb_770210@126.com

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