XXXII. Admittance and impedance loci

Physicochemical characterization of passive films on niobium by admittance and electrochemical impedance spectroscopy studies

An analysis of the electronic properties of amorphous semiconductor–electrolyte junction is reported for thin (Dox < 20 nm) passive film grown on Nb in acidic electrolyte. It will be shown that the theory of amorphous semiconductor–electrolyte junction (a-SC/El) both in the low band-bending and high band-bending regime is able to explain the admittance data of a-Nb2O5/El interface in a large ra...

Analysis of Control Architectures for Teleoperation Systems with Impedance/Admittance Master and Slave Manipulators

A large number of bilateral teleoperation control architectures in the literature have been designed based on assumed impedance models of the master and slave manipulators. However, hydraulic or heavily geared and many other manipulators cannot be properly described by impedance models. In this paper, a common four-channel bilateral control architecture designed for the above impedance models i...

Impedance and Admittance Controller for a Multi-axis Powered Ankle-foot Prosthesis

This paper introduces a finite state machine to select between impedance and admittance control for a powered anklefoot prosthesis controllable in both Dorsiflexion-Plantarflexion (DP) and Inversion-Eversion (IE). Strain gauges are installed on the prosthesis’ foot to measure the strain caused by ground reaction forces, which are correlated to the external torques in DP and IE. The external tor...

Investigation of Tri-Band Bandpass Filter Using Impedance and Admittance Inverters

Universal Properties of 2-Port Scattering, Impedance and Admittance Matrices of Wave Chaotic Systems

Sameer Hemmady , Xing Zheng , James Hart , Thomas M. Antonsen Jr. , Edward Ott 1,2,3 and Steven M. Anlage . Department of Physics, University of Maryland, College Park, MD 20742-4111, U.S.A. [Dated: July 10 , 2006]. Abstract: Statistical fluctuations in the eigenvalues of the scattering, impedance and admittance matrices of 2-Port wave-chaotic systems are studied experimentally using a chaotic ...