Results 31 to 40 of about 12,361 (269)

Real-Time Milling Chatter Detection and Control with Axis Encoder Feedback and Spindle Speed Manipulation

Journal of Manufacturing and Materials Processing
This paper introduces a complete real-time algorithm, where the chatter is detected and eliminated by spindle speed manipulation via the chatter energy feedback calculated from the axis encoder measurement.
Hakan Çalışkan
doaj   +1 more source

Influence of Chatter of VMC Arising During End Milling Operation and Cutting Conditions on Quality of Machined Surface

International Islamic University Malaysia Engineering Journal, 2012
Machine tool chatter is a dynamic instability of the cutting process. Chatter results in poor part surface finish, damaged cutting tool, and an irritating and unacceptable noise.
A.K.M.N. Amin, M.A. Rizal, and M. Razman
doaj   +1 more source

Chatter Detection in Robotic Milling Using Entropy Features

Applied Sciences, 2022
Chatter detection in robotic milling is a difficult issue due to the complex dynamic behavior of robots. In this paper, a novel approach to detecting chatter in the robotic milling process is proposed.
Bin Yang, Kai Guo, Jie Sun
doaj   +1 more source

MN•CS•IO System: Cross‐Species Study for HBB Function in High‐Altitude Hypoxia Adaptation

Advanced Science, EarlyView.
We developed an integrative mesh‐nanorod sorting, chitosan nanoparticle delivery, and intraosseous injection (MN•CS•IO) system to investigate HBB in high‐altitude hypoxia adaptation. Transplanting Tibetan animals' HBB‐modified Lin‐ cells into mice achieved 95.59% transfection efficiency and 8.15% HBB expression. High‐altitude HBB recipients upregulated
Wenqiao Hui, Lin Mao, Binggang Li, Hanyue Kang, Zhengquan Tang, Sheng Chen, Hui Yang, Yu Qiao, Huiqian Ding, Yuhuan Wang, Min Li, Junjie Hu, Shoudong Ye, Xin Wang, Xiaobin Xu, Yupeng Wang, Tana Wuren, Qian Ban, Baowei Zhang   +18 more
wiley   +1 more source

Chatter vibration of workpiece deformation type in cutting thin-walled cylindrical workpiece (Generation mechanism of chatter vibration)

Nihon Kikai Gakkai ronbunshu, 2020
In aerial industry, to improve the mileage, workpiece such as jet engine turbine case has been lightened and thinned. However, cutting workpiece with thin-walled structure causes vibration called “chatter vibration of workpiece deformation type”. Chatter
Yutaka KURITA, Yasunori OURA, Takashi TANAKA, Masahiro KAWATA   +3 more
doaj   +1 more source

A Study on Bistability Analysis and Chatter Suppression for Roll Grinding Process

Journal of Applied Science and Engineering, 2021
As chatter vibration in the roll grinding process is the largest limitation in the surface quality of the machined roll. In this paper, the bistability analysis and chatter suppression are performed for further discussion of patterns of the grinding ...
Duo Yang, Tianding Chen, Chengfei Rao
doaj   +1 more source

Robust Reinforcement Learning Control Framework for a Quadrotor Unmanned Aerial Vehicle Using Critic Neural Network

Advanced Intelligent Systems, Volume 7, Issue 3, March 2025.
Quadrotor unmanned aerial vehicle control is critical to maintain flight safety and efficiency, especially when facing external disturbances and model uncertainties. This article presents a robust reinforcement learning control scheme to deal with these challenges.
Yu Cai, Yefeng Yang, Tao Huang, Boyang Li   +3 more
wiley   +1 more source

3D Closed‐Loop Navigation of Magnetic Microswimmers Using Vision‐Derived Depth Feedback

Advanced Intelligent Systems, EarlyView.
A planar magnetic microswimmer is navigated in three dimensions under a standard microscope. Image defocus supplies a real‐time depth cue, and model‐predictive control with A* planning steers the body on surfaces and in free swimming. Axial position is regulated by propulsion alone, without magnetic field gradients or extra cameras.
Yasin Cagatay Duygu, Sangwon Lee, Min Jun Kim   +2 more
wiley   +1 more source

Cutting Chatter in Ultrasonic Elliptical Vibration Cutting and Its Influence on Surface Roughness and Tool Wear

Metals, 2023
Ultrasonic elliptical vibration cutting has a wide range of applications in the field of precision cutting of difficult-to-machine metal materials.
Gan Li, Jinbo Liu, Yanan Pan, Yan Bao, Sen Yin, Zhigang Dong, Renke Kang   +6 more
doaj   +1 more source

Improving generalisation and accuracy of on-line milling chatter detection via a novel hybrid deep convolutional neural network [PDF]

, 2023
Unstable chatter seriously reduces the quality of machined workpiece and machining efficiency. In order to improve productivity, on-line chatter detection has attracted much interest in the past decades.
Liao, Zhirong, Dongbo Hong, Wu, Qian, Pengfei Zhang, Dong Gao, Yong Lu, Zan, Shusong, Hong, Dongbo, Shusong Zan, Gao, Dong, Zhirong Liao, Qian Wu, Lu, Yong, Zhang, Pengfei   +13 more
core   +1 more source