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Multi-Physical Design and Resonant Controller Based Trajectory Tracking of the Electromagnetically Driven Fast Tool Servo

1
School of Mechanical Engineering, Nanjing University of Science and Technology (NJUST), Nanjing 210094, China
2
College of Mechatronics and Control Engineering, Shenzhen University (SZU), Shenzhen 518060, China
*
Author to whom correspondence should be addressed.
Actuators 2020, 9(2), 28; https://doi.org/10.3390/act9020028
Received: 23 February 2020 / Revised: 3 April 2020 / Accepted: 10 April 2020 / Published: 12 April 2020
In this paper, a voice coil motor (VCM) actuated fast tool servo (FTS) system is developed for diamond turning. To guide motions of the VCM actuator, a crossed double parallelogram flexure mechanism is selected featuring totally symmetric structure with high lateral stiffness. To facilitate the determination of the multi-physical parameters, analytical models of both electromagnetic and mechanical systems are developed. The designed FTS with balanced stroke and natural frequency is then verified through the finite element analysis. Finally, the prototype of the VCM actuated FTS is fabricated and experimentally demonstrated to achieve a stroke of ±59.02 μm and a first natural frequency of 253 Hz. By constructing a closed-loop control using proportional–integral–derivative (PID) controller with the internal-model based resonant controller, the error for tracking a harmonic trajectory with ±10 μm amplitude and 120 Hz frequency is obtained to be ±0.2 μm, demonstrating the capability of the FTS for high accuracy trajectory tracking. View Full-Text
Keywords: fast tool servo; voice coil motor; flexure mechanism; resonant controller fast tool servo; voice coil motor; flexure mechanism; resonant controller
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MDPI and ACS Style

Hussain, I.; Xia, W.; Zhao, D.; Huang, P.; Zhu, Z. Multi-Physical Design and Resonant Controller Based Trajectory Tracking of the Electromagnetically Driven Fast Tool Servo. Actuators 2020, 9, 28.

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