Servo control lead screw transmission device and control method

Abstract

The invention provides a servo control lead screw transmission device and a control method. The transmission device comprises a servo motor, a lead screw nut pair, a linear displacement type potentiometer and a controller. The lead screw nut pair comprises a lead screw nut and a lead screw; the servo motor is used for driving the lead screw nut to rotate and the lead screw to translate relative to the lead screw nut; the linear displacement type potentiometer is used for generating a feedback signal representing the current position of the lead screw; and the controller is used for determining the current position of the lead screw and the current rotating position of the servo motor according to the feedback signal, and generating a control signal for controlling the servo motor to rotate according to the current position, the current rotating position and the input instruction. According to the servo control lead screw transmission device provided by the invention, the current position of the lead screw and the current rotating position of the servo motor are determined only by using the linear displacement type potentiometer, a special angle detection sensor does not need to be arranged in the servo motor, the structure is simplified, and transmission device faults caused by problems of the angle sensor are also reduced.

Description

technical field [0001] The invention relates to the technical field of mechanical automation, in particular to a servo-controlled screw drive mechanism. Background technique [0002] The servo-controlled screw drive mechanism is widely used in occasions where precise control of equipment movements is required, and the typical application is the steering gear of various aircraft. [0003] figure 1 It is a schematic diagram of a typical servo-controlled screw drive mechanism. like figure 1 As shown, a typical servo-controlled screw drive mechanism includes a controller 01, a servo motor 02, a screw nut pair 03 and a displacement sensor 04, and the servo motor 02 also includes an angle sensor. After the servo controller 01 receives the input command, it determines the current angular position of the servo motor 02 through the angle sensor and the protruding position of the screw in the screw nut pair determined by the position sensor 04 to generate a control signal to contro...

AI Technical Summary

Problems solved by technology

[0004] At present, the aforementioned servo control lead screw transmission mechanism still uses an angle sensor to detect the position of the motor, and the reliability of the angle sensor directly affects its safety; in addition, the structure of the angle sensor also increases the size of the servo motor, making the entire servo control transmission structure The size increase

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