Results 31 to 40 of about 347,911 (156)
Sliding Mode Control in Aerospace Applications: A Survey
International Journal of Robust and Nonlinear Control, EarlyView.ABSTRACT Sliding mode control (SMC) enjoys robustness to matched and unmatched (in the case of minimum phase input‐output dynamics) bounded perturbations, and finite time convergence. Second‐order and higher‐order sliding mode control systems (2‐SMC/HOSMC) retain all the advantages of sliding mode control, but in addition can be applied to systems of ...
Yuri Shtessel, Christopher Edwards
wiley +1 more source
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
PLACE‐FRAMING URBANITY: The Case of Kalasatama, Helsinki
International Journal of Urban and Regional Research, EarlyView.Abstract Narratives, visuality and symbolic representations are increasingly important in contemporary urban planning and development. This article seeks to understand how urbanity, one of the key goals of Helsinki's recent planning, has been constructed in the Kalasatama regeneration area. The construction of urban image and identity is viewed as soft
Tuomas Ilmavirta
wiley +1 more source
Birch Leaves as a Minefield: Do Trichomes Mediate Neonate Caterpillar Site Selection?
Entomologia Experimentalis et Applicata, EarlyView.We investigated whether neonate Drepana arcuata caterpillars select leaf sites based on trichome distribution. Specifically, we assessed where larvae establish on leaves, quantified trichome distribution on leaves, and tested whether neonates avoid leaf trichomes. Neonates preferentially established and fed on areas with fewer trichomes, especially the
Leonardo M. Turchen +2 more
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
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
Politics and Justice: Aristotle, Rawls, and the Case for Realism in Political Theory
Philosophy &Public Affairs, EarlyView.ABSTRACT Aristotle's analysis of stasis in Book V of the Politics offers a striking example of “distinctively political thought,” as advocated by Bernard Williams's political realism, and in contrast to the moralist approach exemplified by John Rawls. Aristotle identifies disputes over justice, driven by partial and conflicting conceptions of equality,
Paul Sagar
wiley +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
Earthquake Spectra, Volume 42, Issue 4, November 2026.For many decades, it has been common practice to overlook the differences between response spectra and pseudo response spectra. This practice stems from analyses indicating that the average difference between response spectra and pseudo response spectra is negligible for a viscous damping ratio of 5%, which is near‐universally adopted.
Eric M. Thompson, David M. Boore
wiley +1 more source
Machine tool chatter test and analysis
The Journal of Engineering, 2019 Machine chatter phenomenon has a great influence on the stability during the machining process of the machine tool. It has a great limitation on the machining efficiency of the machine tool and the machining accuracy of the product.
Linxi Li +3 more
doaj +1 more source