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Optimization method of control parameters of servo system of numerical controlled machine tool

A technology for controlling parameters and servo systems, applied in the field of CNC machine tools

Inactive Publication Date: 2013-02-13
XI AN JIAOTONG UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the manual optimization method for the servo control parameters of the existing CNC machine tools, and provide an automatic optimization method for the control parameters of the servo system of the CNC machine tools

Method used

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  • Optimization method of control parameters of servo system of numerical controlled machine tool

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Embodiment Construction

[0068] The numerical control machine tool servo control system control parameter optimization method of the present invention comprises the following steps:

[0069] 1) First, the user determines the three-loop control parameters of the CNC machine tool servo system to be optimized, the number of samples of parameters in each optimization process, the number of linkage axes, the range of control parameters, the maximum number of optimization times, the optimization end criteria, global search capabilities and local searches Capability quantification index (value between 0-1). The boundary value of the selected range of control parameters of the CNC machine tool servo system is the critical control parameter value that causes the unstable working state of the machine tool. The optimization end criterion is the performance index that needs to be achieved by the dynamic characteristics of the CNC machine tool servo system, that is, the fitness function. The single-axis control o...

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Abstract

The invention discloses an optimization method of control parameters of a servo system of a numerical controlled machine tool. The optimization of the control parameters of the servo system of the numerical controlled machine tool affects important indicators of the machine tool such as highest moving speed, positional accuracy and repeated positioning accuracy, and further decides outline accuracy and surface quality of machining workpieces. However, the control parameters of the servo system of the numerical controlled machine tool are various, coupling between the parameters is strong, the parameters are of nonlinearity characteristic, and the parameters are complex as the number of linkage shafts of the numerical controlled machine tool increases. The invention provides an automatic optimization method of the control parameters of the servo system of the numerical controlled machine tool. The automatic optimization method of the control parameters of the servo system of the numerical controlled machine tool is capable of optimizing the control parameters of a multi-shaft and multi-servo system synchronously in real time. Meanwhile, the automatic optimization method of the control parameters of the servo system of the numerical controlled machine tool has the advantages of being high in optimum efficiency, fast in speed of convergence of the control parameters, capable of being transplanted into different numerical controlled systems to be used, and the like. The automatic optimization method of the control parameters of the servo system of the numerical controlled machine tool is capable of seeking an optimal control parameter value of the servo system of the numerical controlled machine tool.

Description

technical field [0001] The invention belongs to the technical field of numerical control machine tools, and relates to a control parameter optimization method of a servo system of a numerical control machine tool, which has a remarkable effect on optimizing the dynamic characteristics of the servo system. Background technique [0002] The optimization of the control parameters of the CNC machine tool servo system is of great significance to improve its machining accuracy. The performance of CNC machine tools largely depends on the degree of optimization of the control parameters of the servo system. It affects important indicators such as the maximum moving speed, positioning accuracy, and repeat positioning accuracy of the machine tool, and then determines the contour accuracy and surface quality of the processed workpiece. However, at present, when most machine tools leave the factory, only the basic setting of the servo control parameters of the machine tool and no optim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/18
Inventor 冯斌梅雪松孙挪刚郭亮任建功叶超
Owner XI AN JIAOTONG UNIV
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