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Operations Research, Systems Engineering and Industrial Engineering Commons

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Full-Text Articles in Operations Research, Systems Engineering and Industrial Engineering

On The Stability Of Unconstrained Receding Horizon Control With A General Terminal Cost, Ali Jadbabaie, John Hauser Dec 2001

On The Stability Of Unconstrained Receding Horizon Control With A General Terminal Cost, Ali Jadbabaie, John Hauser

Departmental Papers (ESE)

This paper deals with unconstrained receding horizon control of nonlinear systems with a general, non-negative terminal cost. Earlier results have indicated that when the terminal cost is a suitable local control Lyapunov function, the receding horizon scheme is stabilizing for any horizon length. In a recent paper, the authors show that there always exist a uniform horizon length which guarantees stability of the receding horizon scheme over any sub-level set of the finite horizon cost when the terminal cost is identically zero. In this paper, we extend this result to the case where the terminal cost is a general non-negative ...


Simulation Optimization Studies Of Routing And Process Flow Problems, Satish Ravichandran Jul 2001

Simulation Optimization Studies Of Routing And Process Flow Problems, Satish Ravichandran

Electrical & Computer Engineering Theses & Disssertations

Computer aided simulation is emerging as a powerful tool for numerical analysis and in conducting performance evaluations of complex systems that depend on a multitude of variables. The primary objective in such simulation studies is to gauge the performance of the system under a various constraints and operating conditions. The effects of changing the operating parameter space can thus be analyzed without having to implement costly changes. Simulations are also carried out for the baseline scenarios to verity and validate the basic underlying system model. In this thesis research, two practical problems were studied through numerical modeling, and optimized solutions ...


Controlling Schedulability-Reliability Trade-Offs In Real-Time Systems , RaʼEd Mohammad S. Al-Omari Jan 2001

Controlling Schedulability-Reliability Trade-Offs In Real-Time Systems , RaʼEd Mohammad S. Al-Omari

Retrospective Theses and Dissertations

The main focus of this thesis is to introduce new techniques that offer trade-offs between schedulability (ability of the system to accept more tasks) and reliability (ability of the system to tolerate more faults) in real-time systems. Different techniques have been introduced for different system models. The mechanisms that are used to offer trade-offs in these techniques differ based on the deadline strictness for each model. In this thesis, three different real-time models (hard, soft, and firm real-time systems) have been studied.;For hard real-time systems, the amount of time redundancy can be varied based on the number and type ...


Preliminary Analysis Of A Biologically Inspired 1-Dof "Clock" Stabilized Hopper, Haldun Komsuoglu, Daniel E. Koditschek Jan 2001

Preliminary Analysis Of A Biologically Inspired 1-Dof "Clock" Stabilized Hopper, Haldun Komsuoglu, Daniel E. Koditschek

Departmental Papers (ESE)

We investigate the stability of a one degree of freedom mechanical spring-mass system modulated by a feed-forward "clock" that stiffens and relaxes a Hooke's law potential force according to a periodic rhythm. At the present early stage of inquiry, we offer sufficient conditions for local asymptotic stability of an isolated periodic orbit when there is no feedback to the clock at all but some viscous friction in the mechanism. We conjecture that, absent feedback, a lossless mechanical system cannot exhibit an asymptotically stable limit cycle in response to such rhythmic excitation.