【摘要】 为了解决玉米收获机割台拨禾链转速缺乏自动控制系统，引起玉米茎秆被推倒的问题，以收获机车速为参考值，使用拨禾链转速与扭矩为反馈值，设计了一种基于双闭环PID控制的拨禾链转速控制系统。经过对关键参数的计算，使用AMESim软件进行了系统建模，并进行了仿真。仿真结果表明，双闭环PID控制系统对转速信号的阶跃响应时间最大为0.87 s，最大超调量2.63%；控制系统受到拨禾链阻力矩阶跃信号影响时，转速最大下降6.34%；拨禾链系统的消耗功率相对于纯机械传动降低5.3%。该控制方法为玉米收获机拨禾链系统的设计提供了新的思路。更多还原

【Abstract】 Corn harvester header reel chain speed lacks automatic control system,which will cause corn stalk to be pushed down.To solve this problem,a reel chain speed control system based on double closed loop PID control was designed with harvester speed as reference value and reel chain speed and torque as feedback value.After calculation of key parameters,the AMESim software was used for system modeling and simulation.Simulation results showed that the maximum step response time of double closed loop PID control system to speed signal was 0.87 s,and the maximum overshoot was 2.63%.When control system was affected by step signal of reel chain resistance torque,the maximum speed drop rate was 6.34%.Power consumption of reel chain system reduced by 5.3% compared with pure mechanical drive.This control method could provide a new idea for design of corn harvester reel chain system.更多还原