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Study on the Motion Control System of Coordinate Measuring Machines

Author: QiYongLi
Tutor: LuZhiYang；ZhangGuoXiong
School: Tianjin University
Course: Measuring Technology and Instruments
Keywords: Coordinate Measuring Machine Motion Control PID Algorithm Multi-axis synchronization
CLC: TH721
Type: Master's thesis
Year: 2007
Downloads: 317
Quote: 2
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Abstract


With the rapid development of modern manufacturing technology , the coordinate measuring machine is becoming the manufacturing industry especially in the automated production quality control leading equipment . However, for some of the complex geometry of the workpiece , it is difficult to use a conventional coordinate measuring machine measurements . The rapid development of the digital signal processor (DSP) , prompting the DSP as the core motion controller is widely used in the field of modern processing industry, as well as measurement . Programmable motion controller , on the one hand makes the coordinate measuring machine to be able to achieve a variety of complex curvilinear motion , which makes the complex geometry of the workpiece measurement to be possible, on the other hand to improve the design of flexible , easy measurement of different shapes the workpiece . Especially with the substantial increase in the accuracy of NC rotary table equipped with a coordinate measuring machine capable of precision CNC turret a more rapid precision measurements rotary workpiece contour feature to promote further development of reverse engineering . This paper analyzes the design and manufacture of the mechanical structure of the multi - axis coordinate measuring machine Mechanical Technology Development Co. , Ltd. in Yantai Central to design a reasonable motion control scheme based on the coordinate measuring machine . In order to improve the speed and position tracking accuracy of the system , respectively, to adjust the PID parameters of the servo system stiffness coefficient and motion control systems as well as the speed , acceleration feedforward coefficient and integral saturation phenomenon PID parameter adjustment process analysis , proposed effective solution . Key technologies in the motion control system , such as the S-shaped deceleration motion , complex curves constructed , manual control system design as well as multi-axis synchronization technology . The use of these key technologies makes complex curve movement possible , in particular, has shown great potential in reverse engineering . Finally a system experiments, determination of a control system of the positioning accuracy of ± 1μm .

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CLC: > Industrial Technology > Machinery and Instrument Industry > Instruments, meters > Coordinates,computer tools,the counter > Coordinates and automatically coordinates
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