Position servo control system based on stepping drive and control method thereof

Abstract

The invention discloses a position servo control system based on stepping drive and a control method thereof. The control system comprises a controller, a stepping motor driver, a stepping motor, a speed reducer and a servo rotating platform. The controller receives position setting of an upper computer to finish position control of the rotating platform, and transmits a speed command to a stepping motor driver through a connection cable between the controller and the stepping motor driver to finish speed control of the stepping motor. The controller receives the position setting through an upper computer interface, finishes position control operation in a processor and outputs pulse output signals and direction output signals to the stepping motor driver to control operation of the stepping motor. Closed-loop position control is formed in the processor through the position setting of the upper computer and the virtual position feedback, and a control function of the position servo system is realized through maximum frequency limit and frequency fluctuation rate control.

Description

technical field [0001] The invention relates to a position follow-up control system and a control method based on a stepping drive, and belongs to the technical field of follow-up control systems. Background technique [0002] The position follower system is a control system in which the input signal at a given position is unknown in advance and changes with time, and the system position output varies with the change of the position input. Usually, the drive system adopts a servo motor drive system. The open-loop drive system composed of a stepper motor and a stepper motor driver has no position feedback components. Compared with the servo motor drive, the open-loop drive system has a simple structure and low price, and has been widely used in economical equipment. [0003] At present, there are mainly two methods for position control of stepper motors. Method 1: In the case of knowing the position input in advance, use the acceleration and deceleration planning method of mo...

AI Technical Summary

Problems solved by technology

[0004] Method 1 is a commonly used position control method for stepping drive systems, corresponding to the position follower system, its position input is often unknown, so it is difficult to complete the position control by trajectory planning; method 2 adds a position sensor to the position control system, as The position feedback signal can prevent the stepping drive from stepping out or overshooting. The disadvantage is that the hardware is increased, the system is complicated, and the cost of the position control system is increased.

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