Guidance and control of aircraft in the landing phase imposes extra pilot work loads, hence application of automatic landing control systems is of great importance. In this study automatic landing control systems are introduced and an optimal landing control system is designed. The control system performance criteria are based on minimum control effort. The designed system is simulated for a tr...

The L1 norm of the control vector is a suitable measure for the effort needed to control a vehicle, since, in several cases of practical interest, it can provide accurate estimate of the fuel consumption. In this paper, we address the problem of minimizing the weighted sum of the L1 norms of the control vectors of N vehicles moving in formation. Specifically, modeling each agent as a six degree...

A minimum effort optimal control problem for the undamped wave equation is considered which involves L∞–control costs. Since the problem is non-differentiable a regularized problem is introduced. Uniqueness of the solution of the regularized problem is proven and the convergence of the regularized solutions is analyzed. Further, a semi-smooth Newton method is formulated to solve the regularized...

The Internet is established on the best-effort service model. The Transmission Control Protocol employed in the current Internet has both fairness and efficiency issues. Pricing scheme has been proposed to address the fairness issue and prevent aggressive users occupying excessive network resource. Random early detection (RED) for the incipient congestion in routers, together with explicit cong...

This review attempts to organize a range of neuropsychological and psycho-physiological data On attention. Three separate, but interacting, neural systems are distinguished: One controls arousal, which is defined in terms of phasic physiological responses to input. The arousal control circuits center on the amygdala. A second system controls activation, which is defined in terms of tonic physio...

he Internet was simply designed for packet delivery. However recent developments such as commercializa-tion and the diversity of application requirements make it obvious that a more concrete definition of the type of service delivered to the user is needed. This description of the service delivered by the network is called the service model and documents the commitments the network makes to the...

We study the joint inventory and sales effort management problems of a retailer in a broad context and investigate the optimal policies for a single item, periodic-review system. In each period, the demand is uncertain depending on the sales effort level exerted by the retailer, which incurs an associated cost. The retailer’s objective is to find a joint optimal inventory replenishment and sale...

Recent results show that a nonsmooth time invariant feedback control law can be used to stabi lize an axi symmetric rigid body using only two con trol torques to the zero equilibrium This method however may require a signi cant amount of con trol e ort especially for initial conditions close to an equilibrium manifold In this paper we propose a control law which reduces the control e ort re qui...