Pressure control method of rolling and pressing equipment based on disturbance observer

Abstract

The invention discloses a pressure control method of rolling and pressing equipment based on a disturbance observer. The pressure control method of the rolling and pressing equipment based on the disturbance observer comprises the steps that by analyzing the input and output characteristics of each sub-module of the servo rolling and pressing equipment, a linear dynamic model G (s) of the rollingand pressing equipment is established; the disturbance observer is constructed, so that a transfer function between input voltage-output force and a transfer function between external interference-output force are obtained; a continuous transfer function of the rolling and pressing equipment is transformed into a discrete form G (z); and a proportional integral feedback controller is additionallyarranged to the outside of the disturbance observer so as to realize the pressure closed-loop control and achieve the purpose of high precision pressure control of the rolling and pressing equipment.According to the pressure control method of the rolling and pressing equipment based on the disturbance observer, by state observing and compensating the external interference and aiming at a non-minimum phase system, an approximate stable inverse model is provided to ensure the stability of the disturbance observer. The control method proposed by the pressure control method of the rolling and pressing equipment based on the disturbance observer is adopted to reduce the influence of the external disturbance force caused by the thickness change of workpieces on the trust of the pressure control, so that the accuracy of the pressure control in the rolling and pressing process is ensured.

Description

technical field [0001] The invention relates to pressure control of rolling equipment, in particular to a pressure control method of rolling equipment based on a disturbance observer. Background technique [0002] Rolling pressing has been widely used in occasions such as notebook battery installation, polarizer lamination, and plate lamination. pressure, another servo motor drives the rollers to roll forward or reciprocate, so as to realize the pressing operation of large-area workpieces. Install a pressure sensor on the upper end of the roller or in the driving mechanism to realize pressure feedback, and compare it with the command pressure to obtain the pressure error, and then use a specific pressure control algorithm to generate a control signal to control the motor so that the actual loading pressure meets the set requirements. [0003] In the process of rolling and pressing, the change of the thickness of the workpiece will cause the actual loading pressure to fluctu...

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Problems solved by technology

[0004] Chinese Patent Application No. 201810002177.3, titled "A Polarizer Laminating Device" mentions a rolling laminating device, which can solve the problem of laminating There is a problem with bonding air bubbles

However, the above method is only suitable for the position control of the servo motor, and cannot be used for the pressure control of the rolling pressing process.

[0006] During the rolling and pressing process, the thickness of the workpiece changes and the actual loading pressure fluctuates. The faster the rolling speed, the greater the pressure fluctuation, which affects the final pressing effect. even damage the workpiece

The rolling equipment and rolling process proposed in the Chinese patents "A Polarizer Laminating Device" and "A Battery Rolling Equipment" cannot effectively solve this problem. These two solutions require rapid rolling. , cannot provide high performance pressure control

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