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A PMLSM-driven xy platform control method and system based on empirical mode decomposition

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

Active Publication Date: 2017-08-29
东能(沈阳)能源工程技术有限公司
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  • Abstract
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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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  • A PMLSM-driven xy platform control method and system based on empirical mode decomposition
  • A PMLSM-driven xy platform control method and system based on empirical mode decomposition
  • A PMLSM-driven xy platform control method and system based on empirical mode decomposition

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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 present invention provides a PMLSM-driven XY platform control method and system based on empirical mode decomposition. The method includes performing current sampling and position sampling in real time during the motion process of the PMLSM-driven XY platform; generating a PWM signal for position control of the PMLSM-driven XY platform; The PMLSM driven XY stage works according to the PWM signal: EMD‑ILC position control of the PMLSM driven XY stage. The system includes a main circuit and a control circuit: the input end of the main circuit is connected to 220V AC, the output end of the main circuit is connected to the three-phase input end of the XY platform driven by PMLSM; the position sampling input end of the control circuit is connected to the grating scale of the XY platform driven by PMLSM, and the control The current sampling input end of the circuit is connected to the A-phase input end and B-phase input end of the PMLSM driving the XY platform. The invention takes the XY platform driven by PMLSM as the controlled object, based on the tracking error information, analyzes it by using the empirical mode decomposition method, screens and eliminates the components that affect the convergence of iterative learning, improves the convergence speed of the system, and thus improves the 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 Patents(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