比例积分微分(proportional⁃integral⁃derivative,PID)控制算法被广泛用于茶园拖拉机的转角控制系统,但是PID控制器带来大量的参数整定以及滞后性,必然会降低控制精度和控制效率.为了解决这一问题,提出了基于灰狼优化算法(grey wolf opt...比例积分微分(proportional⁃integral⁃derivative,PID)控制算法被广泛用于茶园拖拉机的转角控制系统,但是PID控制器带来大量的参数整定以及滞后性,必然会降低控制精度和控制效率.为了解决这一问题,提出了基于灰狼优化算法(grey wolf optimization algorithm,GWOA)的茶园拖拉机转角控制器.首先,建立了简化的茶园拖拉机电动助力转向(electric power steering,EPS)系统的数学模型;其次,采用了基于PID的电动机电流-转向盘转角双闭环的控制策略;接着,设计了灰狼优化算法来对传统PID控制器的参数进行优化,构建了基于灰狼优化算法的PID转角控制器(GWOA⁃PID);最终,利用CARSIM和MATLAB实时模拟拖拉机运行情况,对提出的基于灰狼优化算法的茶园拖拉机转角控制器进行验证,结果表明:传统PID控制器的电流总谐波畸变(total har⁃monic distortion,THD)为11.46%,基于粒子群算法(particle swarm optimization,PSO)的PID控制器的THD为8.12%,所提出的GWOA⁃PID控制器的THD为6.28%,使得电流谐波在原来的基础上降低了45.2%.展开更多
A new type of brushless DC motor has been developed by using a square wave rare earth permanent magnet synchronous motor with its double loop control circuit. The double loop control scheme of the drive system yie...A new type of brushless DC motor has been developed by using a square wave rare earth permanent magnet synchronous motor with its double loop control circuit. The double loop control scheme of the drive system yields a combination of desired characteristics including simplified control structure, small ripple torque, high speed accuracy, wide operating speed range, and fast dynamic response. Experimental results confirm excellent characteristics of the motor.展开更多
文摘比例积分微分(proportional⁃integral⁃derivative,PID)控制算法被广泛用于茶园拖拉机的转角控制系统,但是PID控制器带来大量的参数整定以及滞后性,必然会降低控制精度和控制效率.为了解决这一问题,提出了基于灰狼优化算法(grey wolf optimization algorithm,GWOA)的茶园拖拉机转角控制器.首先,建立了简化的茶园拖拉机电动助力转向(electric power steering,EPS)系统的数学模型;其次,采用了基于PID的电动机电流-转向盘转角双闭环的控制策略;接着,设计了灰狼优化算法来对传统PID控制器的参数进行优化,构建了基于灰狼优化算法的PID转角控制器(GWOA⁃PID);最终,利用CARSIM和MATLAB实时模拟拖拉机运行情况,对提出的基于灰狼优化算法的茶园拖拉机转角控制器进行验证,结果表明:传统PID控制器的电流总谐波畸变(total har⁃monic distortion,THD)为11.46%,基于粒子群算法(particle swarm optimization,PSO)的PID控制器的THD为8.12%,所提出的GWOA⁃PID控制器的THD为6.28%,使得电流谐波在原来的基础上降低了45.2%.
文摘A new type of brushless DC motor has been developed by using a square wave rare earth permanent magnet synchronous motor with its double loop control circuit. The double loop control scheme of the drive system yields a combination of desired characteristics including simplified control structure, small ripple torque, high speed accuracy, wide operating speed range, and fast dynamic response. Experimental results confirm excellent characteristics of the motor.