基于Matlab的液压系统可靠性仿真研究

Research on Reliability Simulation of Hydraulic System Based on Matlab

随着液压系统的发展和对被执行对象和控制算法精度要求的不断精细,常规的微分方程或者差分方程建立的简单模型显然已满足不了当前对控制和仿真的需要。针对此问题,论文对其整个液压系统结构进行了分析和动态建模,在建立的动态模型基础上,分别以设定的普通PID控制和模糊PID控制策略对液压系统进行控制,在Simulink中建立液压系统仿真模型,通过修改动态参数对其液压系统进行仿真。仿真结果表明:论文设计的模糊PID控制策略能够较精确地反映出动态响应特性和稳态特性,从而验证了所设计的模糊控制策略的正确性和可行性。

With the gradual complexity of hydraulic systems and the increasing requirements for hydraulic system simulation,the methods used in the past for differential equations and differential equation modeling for dynamic characterization have not been able to meet current needs.Aiming at this problem,this paper analyzes and dynamically models the whole hydraulic system structure.Based on the established dynamic model,the hydraulic system is controlled by common PID control and fuzzy PID control strategy.The hydraulic system simulation model is established in the Matlab/Simulink environment,and the hydraulic system is simulated by modifying the dynamic parameters.The simulation results show that the fuzzy PID control strategy designed in this paper can accurately reflect the dynamic response characteristics and steady-state characteristics,thus the correctness and feasibility of the designed fuzzy control strategy are verified.