Results 11 to 20 of about 41,880 (94)

Modeling of macro fiber composite actuated laminate plates and aerofoils [PDF]

, 2020
© 2019 Sage Publications . The final, definitive version of this paper has been published in the Journal of Intelligent Material Systems and Structures by Sage Publications Ltd. All rights reserved.
Blazquez Calzada, Angela Carmen, Gilmour, Kevin, Thomas, Peter   +2 more
core   +2 more sources

New technique to measure the cavity defects of Fabry-Perot interferometers [PDF]

, 2019
(Abridged): We define and test a new technique to accurately measure the cavity defects of air-spaced FPIs, including distortions due to the spectral tuning process typical of astronomical observations.
Cauzzi, G., Cavallini, F., Greco, V., Reardon, K., Sordini, A.   +4 more
core   +2 more sources

Nonlinear cancellation of the parametric resonance in elastic beams: theory and experiment [PDF]

, 2007
A non-linear control strategy is applied to a simply supported uniform elastic beam subjected to an axial end force at the principal-parametric resonance frequency of the first skew-symmetric mode.
HAYASHI K., LACARBONARA, Walter, YABUNO H   +2 more
core   +1 more source

Energy-based Safety in Series Elastic Actuation

2020 IEEE International Conference on Robotics and Automation (ICRA), 2020
This work presents the concept of energy-based safety for series-elastic actuation. Generic actuation passivity and safety is treated, defining several energy storage and power flow properties related to passivity. Safe behaviour is not guaranteed by passivity, but can be guaranteed by energy and power limits that adapt the nominal behaviour of an ...
Roozing, Wesley, Groothuis, Stefan S., Stramigioli, Stefano   +2 more
openaire   +2 more sources

Autonomous Deployment of a Solar Panel Using an Elastic Origami and Distributed Shape Memory Polymer Actuators [PDF]

, 2018
Deployable mechanical systems such as space solar panels rely on the intricate stowage of passive modules, and sophisticated deployment using a network of motorized actuators.
Bilal, Osama R., Chen, Tian, Daraio, Chiara, Lang, Robert, Shea, Kristina   +4 more
core   +2 more sources

Multistable series elastic actuators: Design and control [PDF]

Robotics and Autonomous Systems, 2019
Abstract In this paper we propose a novel actuation concept, consisting of a conventional DC motor in series with a compliant element having multiple configurations of equilibrium. The proposed device works similarly to a traditional series elastic actuator, where the elasticity increases safety and force control accuracy, but presents the ...
Cappello, Leonardo, Xiloyannis, Michele, Dinh, Binh Khanh, Pirrera, Alberto, Mattioni, Filippo, Masia, Lorenzo   +5 more
openaire   +4 more sources

Trajectory optimization for walking robots with series elastic actuators [PDF]

53rd IEEE Conference on Decision and Control, 2014
Series elastic actuators are a promising feature for future walking robots. Utilizing the natural oscillation of the elastic actuation can lead to efficient locomotion. However finding a matching combination of joint stiffness and actuator input is challenging as these robots share the properties of underactuated and hybrid dynamic systems.
Werner, Alexander, Lampariello, Roberto, Ott, Christian   +2 more
openaire   +2 more sources

Accurate calibration of test mass displacement in the LIGO interferometers [PDF]

, 2009
We describe three fundamentally different methods we have applied to calibrate the test mass displacement actuators to search for systematic errors in the calibration of the LIGO gravitational-wave detectors.
, A Stuver, Abbott B, Acernese F, Adhikari R, Aso Y, B O'Reilly, Badan M A Landry M Savage R Willems P, E Goetz, E Hirose, G Gonzalez, Goetz E, Goetz E Savage R L, Harry G, Hewitson M, Hewitson M, Hild S, Hild S, J Garofoli, J Kissel, K Kawabe, Kissel J, Kuroda K, Landry M, Lück H, Lück H, M Landry, M Sung, Marion F Mours B Rolland L, Matone L, P Kalmus, R L Savage, Rolland L, Rolland L Marion F Mours B, Siemens X, Takahashi R, Tatsumi D, Telada S, X Siemens   +38 more
core   +1 more source

Precise calibration of LIGO test mass actuators using photon radiation pressure

, 1994
Precise calibration of kilometer-scale interferometric gravitational wave detectors is crucial for source localization and waveform reconstruction. A technique that uses the radiation pressure of a power-modulated auxiliary laser to induce calibrated ...
Goetz, E., Kalmus, P., Erickson, S., Savage Jr., R. L., Gonzalez, G., Kawabe, K., Landry, M., Marka, S., O'Reilly, B., Riles, K., Sigg, D., Willems, P.   +11 more
core   +1 more source

Series-elastic actuation prototype for rough terrain hopping [PDF]

2012 IEEE International Conference on Technologies for Practical Robot Applications (TePRA), 2012
In this paper, we describe development and modeling of a prototype hopping robot. The objective of our work is to create a test platform to verify control theory for fast, legged locomotion with limited sensor knowledge of upcoming, rough-terrain characteristics.
Katie Byl, Marten Byl, Martin Rutschmann, Brian Satzinger, Louis van Blarigan, Giulia Piovan, Jason Cortell   +6 more
openaire   +1 more source