closing pulse造句

• A closed pulse width modulation ( pwm ) regulating speed system for dc servo - motor is presented , it is composed of avr microcontroller , pwm power driver , unit of speed detection using encoder and a serial communication interface , etc . fuzzy pid algorithm is employed to control the speed and position of wmr . the method can solve effectively some problems such as the uncertainty of wmr ' s model , the varieties demand , the change of situation
  其次，设计了基于avr微控制器( at90s8515 )的移动控制系统，其中主要包括pwm功率驱动、测速单元和串行通讯模块等：对机器人速度、位置控制采用模糊pid算法，较好地克服了移动机器人模型的不确定性、转速位置控制要求的多变和环境改变等因素的影响。