Using the optimization criteria, called “Polarization Transformation Efficiency” (PTE), we have obtained the optimum operating voltages that enable to realize perfect dark and bright states in RTN-LCDs with phase compensators between the polarizer and LC cell. The delicate analysis showed, that if the PTE parameter is close to 1 a 700:1 duty ratio of RSTN-LCD with phase compensators having an a...

In this paper we develop linear, fixed-order (i.e., fulland reduced-order) pressure rise feedback dynamic compensators for axial flow compressors. Unlike the nonlinear static controllers proposed in the literature possessing gain at all frequencies, the proposed dynamic compensators explicitly account for compressor performance versus sensor accuracy, compressor performance versus processor thr...

A systematic procedure is proposed for the design of multivariable feedback control systems. For an N x N multivariable control system, the desirable overall compensator is decomposed into N cascaded sub-compensators to be determined in each step. The stabilityequation method is used to find the desirable sub-compensators. After step N, the overall closed-loop system can be designed diagonal do...

This paper concerns the H∞ loop-shaping design for multiloop operation of paralleled DC/DC converters. The preand post-compensators are designed to shape the nominal plant model to achieve the desired performance. Then, the H∞ controller is synthesized in order to achieve the robust stability and robust performance of the system in the presence of uncertainties. Finally, the H∞ controller absor...

The stability of reset control systems has been mainly studied for the feedback interconnection of reset compensators with linear time-invariant systems. This work gives a stability analysis of reset compensators in feedback interconnection with passive nonlinear systems. The results are based on the passivity approach to L2-stability for feedback systems with exogenous inputs, and the fact tha...

This paper discusses and compares different control techniques for damping undesirable inter-area oscillation in power systems by means of Power System Stabilizers (PSS), Static Var Compensators (SVC) and Shunt Static Synchronous Compensators (STATCOM). The oscillation problem is analyzed from the point of view of Hopf bifurcations, an “extended” eigen analysis to study different controllers, t...

Bioelectronic interfaces establish a communication channel between living system and an electrical machine. The first examples emerged in the 18th century when batteries were used to “galvanize” muscles nerves. Today bioelectronic underpin key medical technologies such as cardiac pacemaker emerging ones neuroprostheses brain-machine interfaces. Despite compelling applications systems, employ ma...

Practical realizations of adaptive structures should be designed and implemented to maximize performance, robustness and efficiency. A method of frequency-shaping the compensation of an adaptive structure is developed for increased performance, system robustness and efficiency. Robustness is defined as reduced coupling to out-of-bandwidth modes, where model fidelity frequently suffers, and to i...