Results 91 to 100 of about 1,458 (251)

A novel chatter detection method for micro-milling based on 1D-CNN and SENet

Results in Engineering
The reliance on handcrafted features based on expert prior knowledge limits the adaptability and sensitivity of traditional chatter detection methods, especially under variable machining conditions. To address this limitation, a novel multi-stage chatter
Wei-Kang Wang, Linlin Liu, Biao Wang, Luhuan Shi, Ruihua Li   +4 more
doaj   +1 more source

Discrete Implementations Modify the Intuition of Final Set Adjustment in Barrier Function Based Control

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT This paper establishes an implementation‐aware framework for Barrier Function Adaptation (BFA) and shows that discrete‐time realizations fundamentally alter the logic of final‐set adjustment. In particular, sufficient conditions are derived to preserve the key benefits of BFA (predefined performance, gain adaptation with uncertain perturbation
Luis Ovalle, Andrés González, Leonid Fridman, Meléndez Alfredo   +3 more
wiley   +1 more source

Detection of chatter during high speed milling using chaos theory [PDF]

, 2011
The purpose of this work is to investigate chaos theory as a new method for detection of chatter in milling of metals especially Titanium. This paper introduces application of Chaos in detection of chatter during high speed milling (HSM) process.
Afshin Koohestani (19974546), John Mo (18032137)   +1 more
core  

Investigation and Correction of Actual Microphone Response for Chatter Detection in Milling Operations

Measurement + Control, 2017
Integrating sensors in machine tools for monitoring purpose entails dealing with different issues, not only related to accessibility and safety but also to measureable bandwidth and linearity of the sensors.
Lorenzo Sallese, Niccolò Grossi, Antonio Scippa, Gianni Campatelli   +3 more
doaj   +1 more source

A Two Degree of Freedom Approach for Discrete‐Time Sliding Mode Control

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT This paper proposes a new two degree of freedom (2‐DOF) framework for discrete‐time sliding mode control (DSMC) that decouples the disturbed evolution from its nominal counterpart. The novel nominal/disturbed subsystem separation for DSMC can be used to define multiple closed‐loop specifications. The nominal regulation (or tracking) controller
Tito L. M. Santos, Ary M. Batista
wiley   +1 more source

High‐Order Sliding‐Mode control for MIMO Systems

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT This paper extends Lyapunov‐based homogeneous high‐order sliding‐mode control to a class of uncertain non‐square multi‐input multi‐output (MIMO) nonlinear systems with a well‐defined vector relative degree. The considered systems admit a normal‐form representation with an uncertain but full‐row‐rank input‐gain matrix.
Jaime A. Moreno, Angel Mercado‐Uribe
wiley   +1 more source

Key Technical Fields and Future Outlooks of Space Manipulators: A Survey

SmartBot, EarlyView.
This paper systematically reviews the technological development of space manipulators, emphasizing the unique challenges posed by space environments. It examines four areas: structural design, modeling, planning, and control, while introducing typical ground test platforms.
Gang Chen, Zeyuan Huang, Ying Yan, Xiaokang An, Zhikai Zhao, Jirong Lin, Xiangrong Zhao, Xianyuan Gao, Junyi Zong, Xuewen Jia, Zhipeng Yao, Jianliang Liao, Ning Ji   +12 more
wiley   +1 more source

Chatter detection and suppression using wavelet and fuzzy control approaches in end milling [PDF]

, 2005
In metal cutting processes, chatter has been recognized as one of the main factors that limit machining productivity and affect product quality. Two different categories of chatter were classified by researchers, i.e., regenerative chatter and non ...
Wang, Lei
core   +3 more sources

Detection of Chatter in Machining Processes by the Multiscale Maximum Approximate Entropy and Continuous Wavelet Transform

Applied Mechanics
Chatter is a complex dynamic instability in machining processes and presents nonlinear and nonstationary behavior. Detection of this phenomenon before a catastrophic failure occurs has great importance in the industry today.
Daniel Pérez-Canales, Juan Carlos Jáuregui-Correa, José Álvarez-Ramírez, Luciano Vela-Martínez   +3 more
doaj   +1 more source

Decentralized Electric Vehicle Charging Strategy for Voltage Regulation by Charging Shifting and Reactive Power Control in Distribution System

IEEJ Transactions on Electrical and Electronic Engineering, EarlyView.
This paper proposes a decentralized electric vehicle (EV) charging control method designed to clear voltage violations in distribution grids with high EV penetration, while considering consumer convenience. The concentration of EV charging demand can cause localized voltage violations, posing a significant challenge to grid operation.
Takafumi Watanabe, Akihisa Kaneko, Jun Yoshinaga, Hideo Ishii, Yasuhiro Hayashi, Yoshihiro Hirata, Takami Yokose, Nobuteru Ishihara   +7 more
wiley   +1 more source