Results 41 to 50 of about 9,300 (230)
PID‐Like Robust Control of Non‐Minimum Phase Robotic Manipulators
International Journal of Robust and Nonlinear Control, EarlyView.ABSTRACT This paper proposes an output‐feedback tracking controller for non‐minimum phase nonlinear systems with unknown uncertainties and external disturbances, where not all states are measurable, and the zero dynamics are unstable. The approach combines a backstepping‐based stabilizing state‐feedback law with a cascade extended high‐gain observer ...
Mohammad Al Saaideh +2 more
wiley +1 more source
Time domain simulation of chatter vibrations in indexable drills [PDF]
The International Journal of Advanced Manufacturing Technology, 2016 Regenerative chatter vibrations are common in drilling processes. These unwanted vibrations lead to considerable noise levels, damage the quality of the workpiece, and reduce tool life. The aim of this study is to simulate torsional and axial chatter vibrations as they play important roles in dynamic behavior of indexable insert drills with helical ...
Amir Parsian +3 more
openaire +4 more sources
Identification method for stable spindle rotations against chatter by means of servo information
Nihon Kikai Gakkai ronbunshu, 2015 Chatter vibration must be avoided to ensure the cutting accuracy in milling. Several studies have proposed analytical prediction methods for chatter stability based on a frequency-domain milling model and a modal analysis.
Ryo KOIKE +3 more
doaj +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 +12 more
wiley +1 more source
Lady Anne Kerr: From the Rise of International Conference Interpreting to the Whitlam Dismissal
Australian Journal of Politics &History, EarlyView.Before Anne Robson (née Taggart) became the second Lady Kerr upon marrying governor‐general John Kerr in 1975, she had an international career of some 30 years working as a French to English interpreter and consultant at over 30 national and international conferences and became the first Australian elected to the International Association of Conference
Alexis Bergantz
wiley +1 more source
Chatter Behavior in the Milling Process of Inconel 718: Effects of Tool Edge Radius
MATEC Web of Conferences, 2018 Inconel 718 is widely used in various high end industries such as aerospace, nuclear plant, petrochemical plants etc. Inconel 718 is used for these applications due to unique mechanical properties such as high mechanical strength at elevated temperatures,
Hoe C H, Reddy M M, Lee V C C, Debnath S
doaj +1 more source
Active Control of Chatter in Milling Process Using Intelligent PD/PID Control
IEEE Access, 2018 Chatter is an obstacle for achieving high-quality machining process and high production rate in industries. Chatter is an unstable self-exciting phenomenon that leads to tool wear, poor surface finish, and downgrade the milling operations. A novel active
Satyam Paul, Ruben Morales-Menendez
doaj +1 more source
Selection of design and operational parameters in spindle-holder-tool assemblies for maximum chatter stability by using a new analytical model [PDF]
, 2007 In this paper, using the analytical model developed by the authors, the effects of certain system design and operational parameters on the tool point FRF, thus on the chatter stability are studied.
Budak, Erhan +4 more
core +1 more source
Coloration Technology, EarlyView.Abstract Plants and their extracts have been used for dyeing fabrics, skin and hair for thousands of years and have been experiencing a revival in the last years due to increasing health risks arising from oxidative hair dye precursors. We developed a novel two‐step method to dye keratin fibres based on in situ formed silver nanoparticles including a ...
Julia K. Hachmann +4 more
wiley +1 more source
Proceedings, 2017 The grinding process is a manufacturing process that is performed at the end of the machining chain. In such step, the workpiece has a high added-value and therefore critical problems are not allowed, as they may lead to scrap and significant financial ...
Felipe Aparecido Alexandre +5 more
doaj +1 more source