基于电液加载方式的负载仿真技术的研究

发布时间：2018-04-05 06:45

本文选题：电液伺服加载系统　切入点：多余力矩　出处：《长春理工大学》2013年硕士论文

【摘要】：本文以某随动系统为研究背景,设计了一个电液负载仿真试验台,能够在实验室条件下通过加载静阻力矩、惯性力矩、射击力矩、正弦力矩等负载力矩来考核随动系统的性能。系统采用双联液压马达作为执行机构,以泵、马达双用的工作形式来模拟负载力矩。文中以液压马达做马达为例进行分析,建立了系统的传递函数,并对其特性做了分析,阐述了多余力矩产生的机理,在此基础上采用以输出轴位移作为前馈补偿器输入的办法有效地抑制了多余力矩对加载系统的干扰,降低了系统传递函数的阶次。同时考虑到液压加载系统的非线性、相位滞后、稳态误差等问题,本文又结合了模糊自适应整定PID控制方式进行解决。系统选用LabWindows/CVI作为软件开发环境,编写了实用简便的人机交互界面。仿真和实验结果均表明,本复合控制器能够有效提高系统的静、动态性能和跟踪精度。
[Abstract]:In this paper, an electro-hydraulic load simulation test-bed is designed to test the performance of the servo system by loading static resistance moment, inertia moment, firing moment, sinusoidal moment and so on.The system adopts double hydraulic motor as actuator and simulates load torque in the form of pump and motor.In this paper, taking hydraulic motor as an example, the transfer function of the system is established, its characteristics are analyzed, and the mechanism of producing excess torque is expounded.On this basis, the output shaft displacement is used as the input of feedforward compensator to effectively suppress the interference of the redundant torque to the loading system and reduce the order of the system transfer function.At the same time, considering the nonlinear, phase lag and steady-state error of hydraulic loading system, this paper combines fuzzy adaptive tuning PID control method to solve the problem.The system chooses LabWindows/CVI as the software development environment, and compiles the practical and convenient man-machine interface.The simulation and experimental results show that the hybrid controller can effectively improve the static and dynamic performance and tracking accuracy of the system.
【学位授予单位】：长春理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TH137

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