深海环境下电液比例阀的动态特性仿真研究  

Dynamic Characteristic Simulation of the Electro-hydraulic Proportional Valve in Deep-sea Environment

作　　者：谢强[1] 邓斌[1] 曹学鹏[1] 

机构地区：[1]西南交通大学机械工程学院,四川成都610031

出　　处：《机床与液压》2010年第15期68-69,46,共3页Machine Tool & Hydraulics

基　　金：国家863基金资助项目(2006AA09Z226)

摘　　要：在海洋环境下随着海洋深度的增加,环境压力随之增加,导致在深海环境工作的液压源的液压油阻尼系数(黏度)增加,严重影响比例控制的控制特性。基于深海环境,建立电液比例阀的理论模型,通过Matlab/Simulink对系统仿真,研究随着阻尼系数的增加,PID控制中比例系数Kp对系统调整时间的影响。仿真结果表明高阻尼系数下,PID控制中比例系数Kp的值应适当大一点,以改善在高阻尼系数或深海条件下的系统动态特性,而在低阻尼系数或浅海条件下应该减小Kp的值。分析结果为深海环境下PID控制的设计提供参考。In the marine environment,the environmental pressure will increase with the increase of ocean depth,so the damping coefficient（viscosity）of hydraulic oil in deep-sea environment will increase.It will seriously affect the control characteristics of proportional control.Based on the deep-sea environment,the theoretical model of the electro-hydraulic proportional valve was established,the simulations of the system were made by Matlab/Simulink to rearch the impact of damping coefficient on adjusting time.The simulation results show that in high damping coefficient environment,the value of proportional factor should be big properly to improve system dynamic characteristic;in low damping coefficient environment,the value of proportional factor should be decreased.

关 键 词：电液比例阀 PID控制 仿真 

分 类 号：TH137[机械工程—机械制造及自动化]