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一、开环控制系统自动升降速方式的改进1.自动升降速问题的提出在开环控制系统中,由于不设置闭环控制系统的一套位置测量元件和误差校正系统,而是用步进电机和电液脉冲马达直接驱动机床运动,所以,控制精度在很大程度上依赖于步进电机动作的准确性、可靠性。故对步进电机的准确性,可靠性及速度都有较高的要求。(开环控制系统和闭环控制系统的结构框图如图
First, the open-loop control system to improve the speed of the automatic lifting 1. Automatic lifting speed raised the question In the open-loop control system, the closed-loop control system is not set as a set of position measurement components and error correction system, but with a stepper motor And electro-hydraulic pulse motor directly drives the machine tool movement, so the control accuracy depends largely on the accuracy of stepper motor operation, reliability. Therefore, the accuracy of the stepper motor, reliability and speed have higher requirements. (Open-loop control system and closed-loop control system block diagram shown