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Abstract
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Article Information:
The Acceleration/Deceleration Control Algorithm Based on Trapezoid-Curve Jerk in CNC Machining
Guoyong Zhao, Yugang Zhao and Shijun Wang
Corresponding Author: Guoyong Zhao
Submitted: July 17, 2012
Accepted: August 17, 2012
Published: February 11, 2013 |
Abstract:
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In this study, we propose the acceleration/deceleration control algorithm based on trapezoid-curve jerk in CNC machining. In aviation and mould and die industry, it is much significant to achieve high accuracy CNC machining on complex profile parts. The unsmooth Acceleration/Deceleration (ab. Acc/Dec) control in feed movement is one of the main reasons to bring about machine tools impact and vibration in practical machining. After analyzing the CNC machine tools dynamic model, an Acc/Dec control algorithm based on trapezoid-curve jerk is put forward in order to avoid step change in jerk curve in the study; Moreover, the motion profile smooth control approach based on continuous jerk is developed in details to decrease machine tools impact according to various kinematics constraint conditions, such as the maximum acceleration, the maximum jerk, the machining program segment displacement, the instruction feedrate and so on; Finally, the developed Acc/Dec approach and the traditional linear Acc/Dec approach are compared in the CNC experimental table. The results reveal that the developed approach can achieve more smooth and flexible motion profile, which is helpful to minish machine tools impact and enhance parts machining surface quality.
Key words: Machine tools impact, smooth control, step change, surface quality, trapezoid-curve jerk , ,
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Cite this Reference:
Guoyong Zhao, Yugang Zhao and Shijun Wang, . The Acceleration/Deceleration Control Algorithm Based on Trapezoid-Curve Jerk in CNC Machining. Research Journal of Applied Sciences, Engineering and Technology, (05): 1639-1645.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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