This paper considers two different approaches for analysis of discretized non-linear control laws subject to small computational delays. Emphasis is given to the problem of robustness analysis for the discretized control. Hsu and Sastry (1987) provided a concept for which an explicit formulae is derived here and a modification is suggested allowing robust closed loop analysis in contrast to the...

Controllability is a fundamental concept in control theory. Given a linear control system, we present new algorithms for estimating its distance to uncontrollability, i.e., the norm of the norm-wise smallest perturbation that makes the given system uncontrollable. Many algorithms have been previously proposed to estimate this distance. Our new algorithms are the rst that correctly estimate this...

Networked control is concerned with feedback control systems in which feedback or control signals are transmitted over communication links or networks. This emerging area, which seeks to integrate control and communication theories, presents several fundamental differences and challenges unlike those found in conventional control. A fundamental question facing networked control system design is...

In this paper, we propose a new design method for the traffic network hybrid feedback controller. In the proposed method, the PWARX classifier describes the nonlinear feedback control law of the traffic control system that the output of the previously developed controller is reproduced applying the 0-1 classifications of the PWARX systems. The proposed method is a hierarchical classification pr...

This paper addresses the problem of optimal control system design for networked control systems. We focus on a situation where the plant is single-input single-output and the communication link between the controller and the plant is signal-to-noise ratio constrained. In this setting, we characterize the controllers that minimize the tracking error variance, while respecting the channel signal-...

background: in addition of the socio-economics costs, trauma is the 4th cause of death at all age groups, in 2000, trauma was caused more than 6 million deaths in the world. despite promising trend in improving many aspects of health care and treatment in the last decade in our country, little attention has been paid to the subject of registering trauma on an international standard. effective p...

evolving models have found applications in many real world systems. in this paper, potentials of the evolving linear models (elms) in tracking control design for nonlinear variable structure systems are introduced. at first, an elm is introduced as a dynamic single input, single output (siso) linear model whose parameters as well as dynamic orders of input and output signals can change through ...

the networked control system in modern control widely uses to decrease the implementation cost and increasing the performance. ncs in addition to its advantages is inevitable. nevertheless they suffer of some limitations and deficiencies. packet loss is one of the main limitations which affect the control system in different conditions and finally may lead to system instability. for this reason...

excessive cutting depth during leveling of agricultural land increases power needed by the tractor drawbar and will result in undesirable slippage and excessive strain on the tractor engine.  the result of sustained excess will be the break-down of the tractor. an auxiliary blade depth controller to prevent overloading during leveling was designed, fabricated and evaluated in this study. the sy...