求翻译：其次，完成了测量及控制软件的开发，实现了通过测量的数据的反馈对电机转速的控制。通过PWM实现对电机转速的控制，实现了电机正转，反转，急停。是什么意思？

Secondly, to complete the measurement and control software development, through the feedback of the measured data of the motor speed control. Pwm control of motor speed, motor forward, reverse, emergency stop.

Second, the measurement and control of software development, and implementation of the data by measuring the feedback on the motor speed control. To achieve through PWM motor speed of the motor control, Forward, Reverse, stop.

Next, completed has surveyed and controls the software the development, has realized through the survey data feedback to the electrical machinery rotational speed control.Through the PWM realization to the electrical machinery rotational speed control, has realized the electrical machinery clockwise

Second, completed the measurement and control of software development, achieved by measuring data feedback motor speed control. Motor speed control by PWM realization, realized the motor forward, reverse, emergency stop.