Zhenmin Li , Qinghua Song , Liguo Zhang , Zhanqiang Liu
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引用次数: 0
Abstract
The existing research on the active control of milling vibration primarily focuses on thin-walled plates with simple boundaries. In this paper, the vibration suppression of frame-shaped thin-walled workpieces with sidewall and corner features is studied. Firstly, the kinematics and dynamic models are established to analyze the milling characteristics of sidewalls and corners, respectively. After that, a vibration suppression method combining corner deceleration and active control is presented. The robust controller is designed based on the Hamilton-Jacobi inequality and Lyapunov stability theory. To implement active control, a milling machine integrated with the electromagnetic actuator is developed. The compact structure based on the magnetic bearing is more feasible and convenient for tool-changing operations. The main contribution and performance of the theoretical methods are presented as follows: (I) The workpiece studied in this paper is closer to real thin-walled parts in engineering; (II) The designed controller exhibits good robustness under the changes in the depth of cut and system disturbance; (III) Based on simulation and experimental results, the milling stability is improved effectively and the vibration amplitudes decrease to an average level of more than 23.4%. Referring to the theoretical critical depth of cut based on the stability lobe diagram, the machining efficiency under the control method presented in this paper can be increased by 108%.
期刊介绍:
The International Journal of Mechanical Sciences (IJMS) serves as a global platform for the publication and dissemination of original research that contributes to a deeper scientific understanding of the fundamental disciplines within mechanical, civil, and material engineering.
The primary focus of IJMS is to showcase innovative and ground-breaking work that utilizes analytical and computational modeling techniques, such as Finite Element Method (FEM), Boundary Element Method (BEM), and mesh-free methods, among others. These modeling methods are applied to diverse fields including rigid-body mechanics (e.g., dynamics, vibration, stability), structural mechanics, metal forming, advanced materials (e.g., metals, composites, cellular, smart) behavior and applications, impact mechanics, strain localization, and other nonlinear effects (e.g., large deflections, plasticity, fracture).
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