A control method for high-speed precision beam pointing system of voice coil motor based on pwm
A technology of voice coil motor and control method, applied in the direction of motor control, AC motor control, general control strategy, etc., can solve problems such as poor dynamic performance, shortened adjustment time, system oscillation, etc., to improve execution efficiency and enhance robustness , The effect of shortening the adjustment time
Inactive Publication Date: 2020-09-04
BEIJING INFORMATION SCI & TECH UNIV
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from Figure 3a It can be seen that the PID algorithm generates a step response according to the step signal control system through the duty cycle control dead zone, and the step signal system with a small span takes a long time to adjust and the dynamic performance is poor; Figure 3b It shows that the adjustment time becomes shorter when the span is large, but it causes serious system oscillation and the control effect is not ideal
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[0045]In order to make the purpose, features and advantages of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.
[0046] Those skilled in the art can understand that terms such as "first" and "second" in this application are only used to distinguish different devices, modules or parameters, etc., neither represent any specific technical meaning, nor represent the inevitable relationship between them. logical order.
[0047] Figure 4 It is a schematic structural di...
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The application discloses a PWM-based control method for a high-speed and precise beam pointing system of a voice coil motor. In the voice coil motor servo control system, the voice coil motor has a part with low execution efficiency in the process of being driven by PWM, which leads to the defect that the adjustment time of the system increases during the control process and the robustness deteriorates; this application aims at this The defect proposes a "double closed-loop" control algorithm consisting of a position loop and a speed loop. The position loop uses the PID algorithm to control the precise deflection of the voice coil motor to the specified position, and the speed loop controls the PID algorithm in the position loop according to the motion speed of the voice coil motor and its position. This algorithm improves the execution efficiency of the voice coil motor, greatly shortens the adjustment time of the system, and enhances the robustness of the system.
Description
technical field [0001] The application belongs to the technical field of precision servo control, and in particular relates to a control method for a high-speed precision beam pointing system of a voice coil motor based on PWM. Background technique [0002] In a high-speed precision beam pointing system, in order to control the mirror to deflect quickly and accurately to a given angle, it is necessary to select a reasonable actuator for driving the mirror. A voice coil motor is a single-phase, two-pole device that is a linear motion motor driven by ampere force. It has the characteristics of simple structure, fast response and high motion precision. With the improvement of performance requirements for high-speed, high-precision positioning systems, and the rapid development of voice coil motor technology, voice coil motors are widely used in high-speed, high-precision systems; such as laser video recorders, precision electronic tubes in medical devices, and optical systems ...
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IPC IPC(8): H02P25/034H02P23/00G02B26/08
CPCG02B26/0816H02P23/0004H02P25/034H02P2205/07
Inventor 刘洋夏润秋耿蕊
Owner BEIJING INFORMATION SCI & TECH UNIV