In this paper, slewing maneuver of a flexible spacecraft with large angle of rotation is considered and assuming structural frequency uncertainties a robust minimum-time optimal control law is developed. Considering typical bang-bang control commands with multiple symmetrical switches, a parameter optimization procedure is introduced to find the control forces/torques. The constrained minimizat...

We consider equivalence relations for Fluid Stochastic Petri Nets (FSPNs). Based on equivalence relations for Stochastic Petri Nets (SPNs), which are derived from lumpability for Markov Chains, and from lumpability for certain classes of differential equations, we define an equivalence relation for FSPNs. Lumpability for the differential equations is based on a finite discretization approach an...

This paper presents a new physically-based method for predicting natural hairstyles in the presence of gravity and collisions. The method is based upon a mechanically accurate model for static elastic rods (Kirchhoff model), which accounts for the natural curliness of hair, as well as for hair ellipticity. The equilibrium shape is computed in a stable and easy way by energy minimization. This y...

Switching activities are one of the important factors in power minimization. This paper studies the scheduling problem which minimizes switching activities. We show that to find the schedule which minimizes switching activities only or minimizes latency and switching activities with or without resource constraints is NP-complete. Two heuristic scheduling algorithms to minimize switching activit...

In this paper two algorithms for the synthesis and minimization of a CA (cellular array architecture) are proposed. Starting from a completely specified single-output switching function, our methods produce rectangularly shaped arrays of cells, interconnected in chains, with an effort to minimize the number of the produced chains (cascades). This kind of cellular topology is known throughout th...

In this paper design of switching controllers for linear systems is considered. The controllers are LQ controllers with prescribed degree of stability and switching sequence is determined by minimization of suitable defined priority function. Hybrid controller is developed based on system performance. In the form of theorem is proved: equilibrium point of the hybrid system is exponentially stab...

The importance of on-chip power-rail inductance in generating delta-I power-supply noise is examined in this paper using systematic circuit simulation of the complete integratedcircuit power net. This source of noise is compared to the resistive IR drop in the net, and to the delta-I noise due to both high-inductanceand low-inductance-bonding packages. Results are presented for a typical on-chi...

Energy dissipation during testing has been discovered to be more than during regular mode due to increased switching activity. Test Sequence restructuring approach helps mitigate this problem as it allows the decrease of switching action during testing. This research presents a new Test Sequence restructuring approach. A cross model of genetic and pharaonis algorithms devised to restructure the...