Transactions of Materials and Heat Treatment

Title：Modeling and simulation analysis on operation stability of valve controlled hydraulic cylinder based on SIMULINK

Authors： Han Chensheng Wen Shaofei Lai Cheng

Unit： Shanxi Traffic Vocational and Technical College Julong Steel Pipe Taiyuan University of Technology

KeyWords： valve controlled hydraulic cylinder hydraulic system dynamic characteristics stability characteristics frequency characteristics MATLAB/SIMULINK

ClassificationCode：TP39

year,vol(issue):pagenumber：2017,42(1):82-85

Abstract：

Based on the analysis of valve-controlled hydraulic cylinder system, a mathematical model of single piston hydraulic cylinder (three position and four-way) system in the forging was established by flow and force balance equation and simulated by the MATLAB/SIMULINK software platform, and the stability characteristics, dynamic characteristics and frequency characteristics of the system were analyzed accordingly. The results show that the oscillation and overshoot of valve-controlled hydraulic cylinder appear in the running process, and the system is in stable state as time goes on. Therefore, the steady-state error is zero, and the system response speed is faster with the passing time about 0.4 s, adjusting time about 0.55 s, phase margin about 86.7 ° and amplitude margin about 29.2 dB to provide a necessary theoretical basis for the optimization of system structure parameters. Thus, the pushing effect of valve-controlled hydraulic cylinder on piston extension and the cushioning effect on piston retraction are improved by the valve-controlled hydraulic cylinder with the impact end speed at 6.22 m·s-1 and the return maximum speed at 1.13 m·s-1.

Funds：

山西省自然科学基金资助项目（20140321014-02）

韩晨升(1971-)，男，硕士，讲师 E-mail：wswang222@126.com

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