Minimising point-to-point positioning times using closed-loop stepping-motor control

This paper presents the design and implementation of a positioning system with a dc servomotor and ball-screw mechanism used to realize high-precision positioning over a wide travel range with nanometer level positioning error and near zero overshoot. Instead of the popular dual-model control strategy and friction compensation, a high-gain proportional-integral-derivative controller is used to realize a single-step point-to-point positioning. The controller parameters are obtained by placing closed-loop poles according to the macrodynamics of a ball-screw mechanism only to avoid identification of microdynamics and friction modeling. In order to suppress the overshoot caused by actuator saturation in long-stroke positioning, a trajectory planning method is applied to calculate the input of the closed-loop system. Experimental and simulation results demonstrate that single-step precision positioning responses to different size commands are achieved without producing any large overshoot. In point-to-point positioning from 100 mm down to 10 nm, the positioning error is within 2 nm and the response dynamics is satisfactory.

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Simulation and Design of Double Close-Loop DC Motor Control System Based on Matlab

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.546-547.248 ◽

2012 ◽

Vol 546-547 ◽

pp. 248-253

Author(s):

Jing Jing Xiong ◽

Zhen Feng ◽

Jiao Yu Liu

Keyword(s):

Motor Control ◽

Control System ◽

System Design ◽

Closed Loop ◽

Dynamic Performance ◽

Model System ◽

Optimal Parameters ◽

Actual System ◽

Dc Motor Control ◽

Motor Control System

In this paper, based on the principle of the speed and current double closed loop DC regulating system and the requirement of the static and dynamic performance, we calculate time constant of the regulator, select the structure of the regulator to calculate related parameter and then correct its parameters, and model system and simulation by using Simulink, analysis waveform and debug to find out the optimal parameters of the system regulator to guide the actual system design.

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Control Platform for Tubular Permanent-Magnet Linear Synchronous Motor

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.300-301.1579 ◽

2013 ◽

Vol 300-301 ◽

pp. 1579-1583

Author(s):

Peng Yun Song ◽

Ji Ye Zhang ◽

Ming Li ◽

Shuang Wang

Keyword(s):

Motor Control ◽

Permanent Magnet ◽

Closed Loop ◽

Control Experiment ◽

Synchronous Motor ◽

Linear Motor ◽

Position Sensor ◽

Intended Target ◽

Experiment Platform ◽

Linear Synchronous Motor

In order to study the characteristics of the linear motor, this paper constructed the tubular permanent-magnet linear synchronous motor control experiment platform. Firstly, this paper introduces the structure and principle of the TPMLSM. Secondly, metal bracket is made. Magnetic grid scale is used as position sensor. Three closed-loop controller is constructed. Finally, controller make the linear motor to achieve pre-set target through the programming. The linear motor completed the intended target , and shows excellent characteristics.

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