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PMLSM driven XY platform control method based on empirical mode decomposition, and system thereof

A technology of empirical mode decomposition and platform control, applied in general control systems, control/regulation systems, digital control, etc., can solve problems such as system divergence and system stability impact

Active Publication Date: 2015-08-12
东能(沈阳)能源工程技术有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

When the system runs repeatedly, the stability of the system will be affected by the accumulation of initial positioning errors, and even cause the system to diverge

Method used

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  • PMLSM driven XY platform control method based on empirical mode decomposition, and system thereof
  • PMLSM driven XY platform control method based on empirical mode decomposition, and system thereof
  • PMLSM driven XY platform control method based on empirical mode decomposition, and system thereof

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Embodiment Construction

[0048] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0049] The control principle of the PMLSM driven XY platform based on empirical mode decomposition in this embodiment is as follows: figure 1 As shown, it includes four parts: ILC, EMD-ILC position controller, PI speed controller and controlled object. Among them, the ILC position controller is used to obtain the ideal control input signal, so that the controlled object can output a high-precision tracking trajectory within a limited time and interval; the EMD-ILC position controller is used to eliminate the divergent tracking error signal component in the iterative learning process to ensure The convergence of the iterative learning process improves the convergence speed of the iterative learning process; the PI speed controller is used to effectively overcome the disturbance and improve the response characteristics of the speed loop; the...

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Abstract

The invention provides a PMLSM driven XY platform control method based on empirical mode decomposition, and a system thereof. The PMLSM driven XY platform control method comprises the steps of performing current sampling and position sampling in real time in movement process of the PMLSM driven XY platform; generating a PWM signal for performing position control on the PWLSM driven XY platform; making the PMLSM driven XY platform operate according to the PWM signal; and performing EMD-ILC position control on the PMLSM driven XY platform. The system comprises a main circuit and a control circuit. The input end of the main circuit is connected with 220V AC power. The output end of the main circuit is connected with the three-phase input end of the PMLSM driven XY platform. The position sampling input end of the control circuit is connected with the grating ruler of the PMLSM driven XY platform. The current sampling input end of the control circuit is connected the A-phase input end and the B-phase input end of the PMLSM which drives the XY platform. According to the PMLSM driven XY platform control method, the PMLSM driven XY platform is used as a controlled object, and based on tracking of error information, an empirical mode decomposition method is used for analyzing; thereby screening and eliminating components which affect studying convergence, improving system convergence speed, and improving tracking error.

Description

technical field [0001] The invention belongs to the field of numerical control machining technology control, in particular to a PMLSM driven XY platform control method and system based on empirical mode decomposition. Background technique [0002] The manufacturing industry plays an important role in safeguarding national security and ensuring the rapid growth of the national economy. With the development of digital technology, machine tool technology has entered the era of mechatronics with digital as the core. At present, CNC machine tools have become the most important basic equipment in modern advanced manufacturing technology and mainstream products in the world machine tool market. With the advancement of computer software and hardware, mechanical structures such as cutting tools, and other related technologies, the numerical control technology is developing day by day, and the requirements for the performance of its drive system are also gradually increasing. The fa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04G05B19/18
Inventor 王丽梅孙璐孙宜标
Owner 东能(沈阳)能源工程技术有限公司