摘要
针对非对称液压缸伺服直驱泵控系统控制建模及其参数辨识的问题,分别对伺服电机和泵控非对称液压缸系统进行了理论分析建模,得到了传递函数的模型结构及其阶数。对传统控制理论中的幅频特性测量传递函数方法进行了说明,提出了一种将理论分析建模与系统辨识建模相结合的精确求解系统传递函数的方法,并对伺服电机和泵控非对称液压缸系统分别进行了幅频特性实验,最后采用上述方法得到了非对称液压缸伺服泵控系统控制模型的主要参数和传递函数。研究结果表明:该方法可用于求解系统的传递函数,具有一定的实际应用意义;该方法可为液压机伺服直驱泵控系统的精确控制打下基础。
Aiming at the problem of control modeling and parameter identification of asymmetric hydraulic cylinder servo direct drive pump control system, modeling of servo motor and pump-controlled asymmetric hydraulic cylinder system were derived by theoretical analysis, and the model structure and order of transfer function was obtained. The transfer function method for measuring amplitude-frequency characteristics in traditional control theory was described. A method of accurately solving system transfer function was proposed, which combines theoretical modeling with system identification modeling. The amplitude-frequency characteristics of servo motor and pump-controlled asymmetric hydraulic cylinder system were experimented respectively. The parameters and transfer functions of the control model of the asymmetric hydraulic cylinder servo pump control system were obtained by using the above method. The experimental results show that the method can be used to solve the transfer function of the system, and has certain practical significance. Above reasearches give a good foundation for precise control of press servo direct drive pump control system.
作者
徐坤
朱灯林
梅志千
陈成
XU Kun;AZHU Deng-Iin;AMEI Zhi-qian;ACHEN Cheng(College of Mechanical and Electrical Engineering, Hohai University, Changzhou 213000, China;Changzhou Key Laboratory of Special Robots and Intelligent Technology, Changzhou 213000, China)
出处
《机电工程》
CAS
北大核心
2019年第5期524-528,共5页
Journal of Mechanical & Electrical Engineering
基金
国家自然科学基金资助项目(51375140)
关键词
液压伺服泵控技术
传递函数
参数辨识
幅频特性
hydraulic servo pump control technology
transfer function
parameter identification
amplitude-frequency characteristics
