Voice coil motor control method and system

Abstract

The invention discloses a voice coil motor control method and system. The method comprises the steps of receiving preset position information and preset current information determined according to preset acting force information; driving a voice coil motor to reach a given position through a position closed loop and a current closed loop based on a high current gain according to the preset position information, wherein the high current gain is a grain within a range from a first preset gain value to a second preset gain value; acquiring a current of the voice coil motor, and determining whether the current is greater than a preset current threshold; if yes, driving an acting force formed by the voice coil motor to reach a specified acting force through a current closed loop based on a lowcurrent gain according to the preset current information, wherein the low current gain is a gain within a range from the first preset gain value to a third preset gain value, and the second preset gain value is smaller than the third preset gain value. According to the voice coil motor control method and system, different requirements at the position control stage and the force control stage can be met simultaneously, the voice coil motor can complete a complicated process, and the application range of the voice coil motor is greatly widened.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to a control method and system for a voice coil motor. Background technique [0002] With the continuous progress and development of the technology industry, the iteration speed of new products is getting faster and faster, and the requirements for high-speed and high-precision production equipment are becoming more and more stringent. Voice coil motors have simple structure, small size, light weight, high speed, Excellent characteristics such as high acceleration, high precision (direct drive) and fast response speed, as well as the advantages of long life and high frequency of motion, so it is more and more widely used in high-speed and high-precision equipment. [0003] Since position control and force control are required for voice coil motors in many working conditions, switching between position control and force control is involved in these working conditions, that ...

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Problems solved by technology

[0003] Since position control and force control are required for voice coil motors in many working conditions, switching between position control and force control is involved in these working conditions, that is, switching of position and force. The drivers all use the same gain method. This control strategy can be used in the working conditions that generally do not require contact, but if the working conditions require close contact, this method cannot take into account the fast position following ability and fine force control, so it is not suitable for close contact conditions, which greatly limits the application fields of voice coil motors

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