Vibration suppression of thin-walled workpiece milling using a time-space varying PD control method via piezoelectric actuator
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The vibration suppression and workpiece surface improvement of thin-walled workpiece milling are highly concerned due to the weak stiffness of the workpiece and the time variant of dynamic characteristics during milling process. In this paper, an active vibration control system is developed to suppress the vibration of thin-walled workpiece milling. The dynamic model of plate-actuator milling system is derived using Hamilton’s principle and solved using FEM method. Acceleration sensor and piezoelectric patch are selected as the sensor and actuator in the control system. Considering the time variant of dynamic characteristics and the position limit of sensor and actuator during milling process, a time-space varying PD (VPD) control method is presented and utilized. The VPD control method applies time varying control parameters. Some simulation and experimental validations are carried out to validate the effectiveness of the control system. The overall results indicate that the proposed control system perform well in suppressing the vibration of thin-walled workpiece milling process.
KeywordsVibration control Thin-walled workpiece milling Piezoelectric actuator PD control
The authors are grateful to the financial supports of the National Natural Science Foundation of China (no. 51575319), the Major projects of National Science and Technology (Grant No. 2019ZX04001031), Natural Science Outstanding Youth Fund of Shandong Province (Grant No. ZR2019JQ19), and the Key Research and Development Plan of Shandong Province (no. 2018GGX103007). The authors declare that there is no conflict of interest.
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Conflict of interest
The authors declare that they have no conflict of interest.
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