基于模糊PID的山地液压收割机工作机构升降回路仿真分析

Simulation Analysis of Working Mechanism Lifting Circuit for Mountain Hydraulic Harvester Based on Fuzzy PID

该文采用模糊PID控制的山地收割机工作机构升降回路为研究对象,设计出收割机工作回路原理图和基于模糊PID的山地收割机控制原理结构图,求得收割机工作机构升降回路的数学模型,利用仿真软件MATLAB中的Fuzzy Logic Designer建立模糊规则,利用Simulink模块搭建仿真模型,将模糊PID控制与PID控制对比分析。仿真结果表明模糊PID控制能够有效地降低系统初期的超调量,提高响应速度,系统达到稳定所需时间更短。基于模糊PID控制的山地收割机相对于PID控制来说振动幅度更低,反应速度更加迅速。研究结果表明山地收割机采用模糊PID控制能够明显地提升机器性能,将模糊PID控制应用于山地收割机是切实可行的。

This article uses fuzzy PID control mountain harvester working mechanism lifting circuit as the research object,design the harvester working circuit principle diagram and the mountain harvester control principle structure diagram based on fuzzy PID,and obtain the mathematical model of the harvester working mechanism lifting circuit.Fuzzy Logic Designer in the simulation software MATLAB is used to establish fuzzy rules,Simulink module is used to build a simulation model,and the fuzzy PID control and PID control are compared and analyzed.The simulation results show that the fuzzy PID control can effectively reduce the initial overshoot of the system,improve the response speed,and the time required for the system to reach stability is shorter.Compared with PID control,the mountain harvester based on fuzzy PID control has lower vibration amplitude and faster response speed.The research results show that the use of fuzzy PID control for mountain harvesters can significantly improve machine performance,and it is feasible to apply fuzzy PID control to mountain harvesters.