智能型阀门电液执行器的动态特性分析

Dynamic characteristics analysis of intelligent electrohydraulic valve actuator

当前所用的阀门电液执行机构不仅存在卡涩、滞后等缺陷,而且液压伺服系统投资大、附属设备多、系统复杂。而智能阀门电液执行器从根本上解决了上述问题。通过对智能阀门电液执行器的理论分析,系统地阐述了智能阀门电液执行器的系统组成、工作原理及实现方法,在此基础上推导出系统每一环节的数学模型,进而得到系统数学模型。根据该系统模型,利用奈魁斯特判据分析了智能阀门电液执行器的动态稳定性。它的使用可以提高调节系统的安全性和可靠性。

Based on the theoretical analysis,the system structure,working mechanism and implemen-tation of intelligent electrohydraulic valve actuator are systematically described. The mathematical models for different parts of the system are deduced,based on which the mathematical model of whole system is obtained. Its dynamic stability is analyzed by Nyquist criterion. Its application may improve the safety and reliability of the regulating system.