The Experts below are selected from a list of 345420 Experts worldwide ranked by ideXlab platform
Minghui Zhang - One of the best experts on this subject based on the ideXlab platform.
-
a multi Degree of Freedom ultrasonic motor using in plane deformation of planar piezoelectric elements
Sensors and Actuators A-physical, 2008Co-Authors: Minghui ZhangAbstract:A novel multi-Degree-of-Freedom (MDof) ultrasonic motor was presented in this paper. The in-plane deformation of planar piezoelectric elements was used to generate the vibrations in the single stator. The working principle was elaborated; an initial prototype was fabricated and tested. The elliptical motion at the tip of the stator was demonstrated by measuring the vibration characteristics. And the load characteristic of the motor was also obtained. The results confirm that the motor successfully provides the desired MDof motion around orthogonal axes with a single stator using in-plane deformation of planar piezoelectric elements.
Claude-henri Lamarque - One of the best experts on this subject based on the ideXlab platform.
-
DAMPING IDENTIFICATION IN MULTI-Degree-of-Freedom SYSTEMS VIA A WAVELET-LOGARITHMIC DECREMENT--PART 1: THEORY
Journal of Sound and Vibration, 2000Co-Authors: Claude-henri Lamarque, Stéphane Pernot, A. CuerAbstract:A wavelet-based formula similar to the logarithmic decrement formula is introduced to estimate damping in multi-Degree-of-Freedom systems from time-domain responses. Both analytical and numerical approaches are investigated.
-
DAMPING IDENTIFICATION IN MULTI-Degree-of-Freedom SYSTEM VIA A WAVELET-LOGARITHMIC DECREMENT--PART 2: STUDY of A CIVIL ENGINEERING BUILDING
Journal of Sound and Vibration, 2000Co-Authors: Stéphane Hans, E. Ibrahim, Stéphane Pernot, Claude Boutin, Claude-henri LamarqueAbstract:In a previous paper entitled "Damping identification in multi-Degree-of-Freedom (m.d.o.f.) systems via wavelet-logarithmic decrement--Part 1: theory", a wavelet-logarithmic decrement formula was established to estimate damping in multi-Degree-of-Freedom systems from time-domain responses. Numerical validation was then investigated using the dynamic response of exact single-Degree-of-Freedom systems that were artificially perturbed with a Gaussian noise. Part 2 is now dedicated to the application of the wavelet procedure to identify the damping of in situ dynamic responses of a civil engineering building excited with both harmonic and shock testings.
-
Comparison of the behavior of exact and approximate modelling of a nonlinear oscilator with one Degree-of-Freedom
Journal of Technical Physics, 1999Co-Authors: V. Mesnier, Claude-henri Lamarque, Jean-marc Malasoma, Jan AwrejcewiczAbstract:We consider a nonlinear mechanical system with one Degree of Freedom described by an exact model and then by a piecewise linear approximations of this model. We compare the global dynamic behavior of the exact model with that of the approximate model. An example shows that it is possible to describe complex behaviors with a rather reasonable accuracy.
Wei Chen - One of the best experts on this subject based on the ideXlab platform.
-
a molecular regulation strategy towards low voltage driven multi Degree of Freedom ipmc catheters
Chemical Communications, 2018Co-Authors: Lei Zhao, Wei ChenAbstract:A multi Degree of Freedom ionic polymer–metal composite (IPMC) active catheter with controllable bending ability (from micrometer to millimeter level) under a low voltage (∼1.0 V) was developed. And its actuation properties were enhanced effectively through a molecular-regulation strategy.
Yaowen Yang - One of the best experts on this subject based on the ideXlab platform.
-
a multiple Degree of Freedom piezoelectric energy harvesting model
Journal of Intelligent Material Systems and Structures, 2012Co-Authors: Lihua Tang, Yaowen YangAbstract:Conventional vibration energy harvesters have been usually studied as single-Degree-of-Freedom models. The fact that such harvesters are only efficient near sole resonance limits their applicabilit...
Cha'o-kuang Chen - One of the best experts on this subject based on the ideXlab platform.
-
A geometric model of a spherical gear with a double Degree of Freedom
Journal of Materials Processing Technology, 2002Co-Authors: Shyue-cheng Yang, Cha'o-kuang ChenAbstract:Abstract This paper presents a double Degree of Freedom spherical gear mechanism with circular arc teeth. The developed spherical gear is very suitable for the flexible wrist of a robot. Based on the envelope theory of a two-parameter family of generating surfaces, mathematical and geometrical models of a spherical gear with circular arc teeth are proposed. In the process of machining a gear blank, the required tool path can be generated by using the obtained geometric models, the forms of which are determined easily by envelope theory. Finally, the geometric model of the spherical gear can be obtained simultaneously by Mastercam and SolidWorks software.
