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| Explicit Force Control of a Cutting-Force Simulator for Numerical Control Machine Tools |
| FAN Rui, WAN Yinghe, WANG Dan, GUO Jiangzhen |
| School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China |
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Abstract For reliability tests of machine tools, a load simulator based on a 3P-(4S) parallel mechanism is proposed.
An explicit force control system is designed based on a proportional-integral (PI) controller. A fuzzy logic is introduced
to adapt various following errors of output forces. A force feedforward is integrated to the system to develop its dynamic
performance and decrease the hysteresis of the output forces. Meanwhile, a position feedforward that predicted the position
of the spindle is designed to eliminate the disturbance caused by the unknown feeding motions of the spindle. Loading experiments
is conducted on a stationary and a moving spindle, respectively, to validate the feasibility of the proposed control
system.
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2017, 
