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Direct Contour Control Method of Plane Cartesian Coordinate Motion System

A plane Cartesian coordinates and motion system technology, applied in the direction of digital control, program control system, electrical program control, etc., can solve the problems of low precision and difficult adjustment, achieve high-precision contour control, simplify the adjustment process, and realize contour control. Effect

Active Publication Date: 2018-07-06
TIANJIN UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a direct contour control method for a plane Cartesian coordinate motion system, which can solve the problems of low precision and difficult adjustment of existing control methods

Method used

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  • Direct Contour Control Method of Plane Cartesian Coordinate Motion System
  • Direct Contour Control Method of Plane Cartesian Coordinate Motion System
  • Direct Contour Control Method of Plane Cartesian Coordinate Motion System

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Embodiment Construction

[0034] The implementation steps of the method of the present invention will be further described below in conjunction with the accompanying drawings and examples. It should be noted that the following examples are illustrative, not limiting, and the content covered by the present invention is not limited to the following examples.

[0035] The direct contour control method of the planar Cartesian coordinate motion system is completed through the following 11 modular logical processing calculations. The specific steps are as follows:

[0036] (1) Motion planning: generate contour motion tangential speed command planning; according to the programming contour input by the user Plan the contour motion process with the motion planning constraints, and generate the contour motion tangential velocity command v tc The relationship function f, v with the profile curve parameter u tc =f(u), for the subsequent real-time control link.

[0037] (2) Contour status monitoring: according ...

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Abstract

The invention discloses a direct contour control method of a plane rectangular coordinate motion system. The method is completed through eleven modular logic processing calculations and comprises the following concrete steps: motion planning; contour state monitoring; speed inverse transformation; tangential speed generation; tangential speed control; contour error control; control amount forward transformation; feature matching of an X axis and a Y axis; and single-axis control of the X axis and the Y axis. According to the method, a contour motion state can be monitored in real time, and real contour errors are calculated according to analysis formulas of an actual position and a programming contour. Dual-closed-loop control of the contour errors and a contour error speed is realized in a contour error direction, a physical rule of a right angle coordinate motion system is observed, and the contour control effect is improved. Through real-time transformation of the speed and a control amount under right angle coordinates and contour coordinates and feature matching of the coordinate axes, each right angle coordinate axis coordinates consistently during contour motion in different directions. The contour errors can be fully reduced, and high-precision contour control is realized.

Description

technical field [0001] The invention belongs to the field of numerical control machining, and in particular relates to a computer numerical control technical method for planar Cartesian coordinate contour movement. Background technique [0002] In the process of CNC machining, contour error is an important index to evaluate the accuracy of multi-axis motion control system. At present, the basic principle of computer digital control of the Cartesian coordinate motion control system is that the control system performs data sampling interpolation on the contour moving path, interpolates to obtain the coordinates in the Cartesian coordinate system at each time, and then distributes the interpolation coordinates to The servo system of each moving axis is used as the position command of the servo system of each moving axis. The servo system of each axis follows the position command, and compares the data of the axis position with the command position output by interpolation at th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/19
CPCG05B19/19G05B2219/26
Inventor 董靖川王太勇李勃刘喆于治强
Owner TIANJIN UNIV
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