Full closed-loop control system and method based on servo press without sensor

A servo press and control system technology, applied in presses, manufacturing tools, etc., can solve the problems of being easily affected by electromagnetic interference and noise, affecting the speed and efficiency of stamping strokes, and the workpiece is easy to wrinkle, so as to achieve reliability and anti-interference Improve performance, overcome fuselage deformation, and solve overshoot effects
CN110757882AActive Publication Date: 2020-02-07JINING KELI PHOTOELECTRIC IND CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
JINING KELI PHOTOELECTRIC IND CO LTD
Publication Date
2020-02-07

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Abstract

The present invention belongs to that technical field of control and plastic forming, and particularly relates to a full closed-loop control system and method based on a servo press without a sensor.The whole electric control system of the present invention is provided with a process curve interpolation algorithm, dynamic analysis and model building module, a nonlinear prediction controller and arobust controller; a speed observer without a position sensor is adopted in a servo driver, including a Luenberger observer. The difference between a process forming curve and the actual position ofa sliding block is input into the dynamic analysis and model building module, the given output torque is taken as the input parameter of the robust controller, the nonlinear prediction controller replaces the function of PI in the robust controller, the output of the nonlinear prediction controller is taken as the input parameter of the robust controller, and the output of the robust controller istaken as that of the Luenberger observer, so that the position of the sliding block is precisely controlled, and the problem of overshooting in the position control mode of the traditional servo press is solved.
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Description

technical field

[0001] The invention belongs to the field of control technology and plastic forming technology, and in particular relates to a full-closed-loop control system and method based on a sensorless servo press. Background technique

[0002] At this stage, in the field of metal forming, servo motor power system has been widely used, but it is used in a very different way. At present, the most commonly used servo press slider position control method is semi-closed-loop control, that is, the encoder is used as the sensor for the closed-loop feedback of the crankshaft angle, and the drive system is composed of a servo motor and a servo driver. The problem with this control method is that it does not use The actual position of the slider is used as the feedback object. The servo press consists of two power parts, the fine-tuning control unit and the main drive power system. The fine-tuning control unit can automatically adjust the mold or set the height of the closed ...

Claims

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