A Closed-loop Time Domain Simulation Method of Feed System Based on Dynamic Test Data
A feed system and dynamic testing technology, applied in general control systems, control/adjustment systems, instruments, etc., to overcome the problems of modeling complexity and modeling accuracy or identification accuracy, and achieve high accuracy
Active Publication Date: 2020-10-27
XI AN JIAOTONG UNIV
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
This method also faces problems such as the selection of the order of the model to be identified, and the trade-off between identification efficiency and accuracy.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0044] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.
[0045] The present invention is a feed system closed-loop time-domain simulation method based on dynamic test data, such as figure 1 As shown, it includes three steps: dynamic testing and frequency response estimation based on servo motor self-excitation; closed-loop frequency characteristic calculation based on control structure; closed-loop time-domain simulation calculation output based on inverse Fourier transform and time-domain convolution. The details are as follows.
[0046] Step 1, dynamic test and frequency response estimation based on servo motor self-excitation, such as figure 2 As shown, the servo motor of the feed system is used to generate a frequency-sweep excitation torque with a certain amplitude and bandwidth, and the encoder, long grating, and acceleration sensor are use...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a closed-loop time domain simulation method for a feeding system based on dynamic testing data, and the method comprises the following steps: 1, carrying out the dynamic testingand frequency response estimation based on the self-excitation of a servo motor, carrying out the frequency response estimation of excitation and response signals, and obtaining a one-in three-out frequency response array; 2, obtaining the closed-loop frequency characteristics of displacement response output based on a feeding system control structure after instruction displacement is inputted toa working platform; 3, solving a unit pulse response of the feeding system through the inverse Fourier transform, carrying out the time domain convolution of the unit pulse response and a specific displacement instruction, solving closed-loop time domain response output as the closed-loop time domain simulation output of the feeding system. The method solves problems of modeling complexity and modeling precision or recognition precision of related methods, is simple and direct, and is high in precision. The invention provides an experimental modeling and time domain simulation method for thehigh-order dynamic characteristics of the feeding system, and the method can be used for the prediction evaluation of the single-axis movement precision, and also can be used for the design of a controller and the parameter optimization setting.
Description
technical field [0001] The invention belongs to dynamic characteristic modeling and time-domain simulation technology of a feeding system, relates to a dynamic testing technology, a frequency response estimation method and a time-domain simulation method, in particular to a closed-loop time-domain simulation method of a feeding system based on dynamic test data. Background technique [0002] CNC machine tools are important mechanical manufacturing equipment, and the performance of the feed axis is the premise and basis for the machine tool to achieve high-speed and high-precision machining. In the stage of machine tool design and debugging, it is often necessary to investigate the command input and actual response of the feed axis in the time domain, so as to analyze its steady-state error and dynamic error, and perform performance evaluation for further optimal design and controller parameter optimization. set up. [0003] The most direct method for time-domain analysis is...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G05B17/02
CPCG05B17/02
Inventor 刘辉赵万华杨晓君吕盾张俊张会杰
Owner XI AN JIAOTONG UNIV