This paper concerns an optimal control problem defined on a class of switched-mode hybrid dynamical systems. The system’s mode is changed (switched) whenever the state variable crosses a certain surface in the state space, henceforth called a switching surface. These switching surfaces are parameterized by finite-dimensional vectors called the switching parameters. The optimal control problem i...

Physical system modeling benefits from the use of implicit equations because it is often an intuitive way to describe physical constraints and behaviors. To achieve efficient models, model abstraction may lead to idealized component behavior that switches between modes of operation (e.g., an electrical diode may be on or off) based on inequalities (e.g., voltage > 0). In an explicit representat...

The paper deals with the problem of designing main FPGA-cell blocks with the current-mode gates – novel digital gates operating with constant, continuous power supply current. Using proposed approaches to designing digital current-mode circuits, the current-mode prototypes of several digital circuits and the Spartan II slice are designed. The obtained circuits are characterized by smaller hardw...

Soft switching of DC-DC converter is done here. This is obtain good efficiency and to reduce the switching losses. Zero voltage switching reduces the switching losses in the circuit. This is done by using boost converter. Soft-switching characteristic of the proposed converter reduces switching loss of active power switches and raises the conversion efficiency. A voltage step-up function and a ...

There has been an ever-increasing demand to increase the switching frequency, power density, efficiency and dynamic performance of switch-mode power converter, the development of soft-switching technology has taken an accelerated pace. This paper provides a review on the development of soft-switching power converters for electric vehicle (EV) propulsion and recent research trends will also be d...

Direct Torque Control (DTC) algorithm for induction motor drives gives fast transient response. The classical DTC algorithm utilizes a proportional integral (PI) speed controller to generate the reference torque value. Though this is quite effective, it is sensitive to parameter variation. To overcome this problem, this paper presents a fuzzy variable structure controller (FVSC), which improves...

Switched nonlinear systems with delay in the switching instant could be destabilized, despite stable dynamics in each mode, if the delay is long enough. We identify a restriction on the switching scheme to assure stability despite a finite delay in switching instant. The restriction partitions the state-space in a time-varying manner for a known switching delay, and converges to a steady-state ...

Multicast support in a Multipro-tocol Label Switching (MPLS) network has yet to be deened. An MPLS network consists of label switching devices such as ATM. This document discusses both dense-mode and sparse-mode IP multicast within the context of MPLS networks. Unlike unicast routing, dense-mode multicast routing trees are established in a data-driven manner and it is not possible to topologica...

Past models of current-mode control have sufferered from either insufficient accuracy to properly predict the effects of current-mode control, or from analytical complexity that renders them inaccessible to the power supply designer. This paper combines the accuracy of sampled-data modeling with the simplicity of conventional pole-zero representation. As a result, it offers a current-mode contr...