The functional design and hardware component of control system were introduced, and the control calculation of driving ring plate with step motor was deduced in details.

介绍了控制系统的功能设计及硬件组成，重点推导了用步进电机驱动钢领板的控制算法。

youdao

Some greet each other as they pass in opposite directions or ring their bells at cars driving alongside.

BBC: Biking in Buenos Aires picks up speed