A pressure control method for servo pressing equipment based on input shaping

Abstract

The invention discloses a pressure control method of servo lamination equipment based on input shaping. The servo lamination equipment is systematically modeled to obtain the transfer function of the system; Load the frequency sweep voltage signal, measure the pressure data fed back by the pressure sensor, and obtain the frequency response curve of the system from the voltage signal and the pressure signal; based on the established transfer function, perform parameter identification on the servo pressing system to obtain the natural frequency ω of the system d And the damping ratio ξ; then get the parameters of the ZVD input shaper; combined with the designed input shaper, get the servo pressure feedback controller. The present invention adds a pressure closed-loop controller based on input shaping outside the current loop of the servo system, thereby increasing the damping of the system and improving the feedback control gain without reducing the rigidity of the system, thereby shortening the pressure build-up time, At the same time, the pressure control precision is improved.

Description

technical field [0001] The invention relates to a pressure control method of a servo pressing device, in particular to a pressure control method of a servo pressing device based on input shaping. Background technique [0002] With the development trend of thinner and lighter, press-fit assembly technology has been more and more widely used in the assembly process of 3C electronic products, such as the assembly of notebook batteries, keyboards, keyboard shells, microphones and other components. Using the press-fit assembly process, its main mechanism is: first place a pressure-sensitive adhesive between the workpiece and the base, and then drive the screw to rotate through the servo drive, thereby driving the indenter to load a certain pressure on the workpiece and keep it for a certain period of time. Time, so that the workpiece and the base are firmly bonded together. Servo pressing equipment arranges a pressure sensor in the pressure head or the driving mechanism to reali...

AI Technical Summary

Problems solved by technology

[0006] Servo pressing equipment generally has the characteristics of high rigidity and light damping, and it is prone to oscillation during the fast pressing process, resulting in greater impact and even damage to the workpiece

The control methods proposed in the Chinese patent "a wafer pressure control device, method and system" and "motor control device" cannot effectively solve this problem, and cannot provide rapid pressure build-up in the case of pressure control requiring fast response and high precision pressure control

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