This paper introduces new concepts in the performance evaluation of mobile telecommunications systems that use the PRMA protocol. The performance target commonly accepted, the probability of a packet being dropped, is revised, and the Front End Clipping (FEC) probability is used instead. The variable delay is redefined excluding the clip time (in fact a different degradation). An analytical met...

Improved results on receding horizon control (RHC), or model predictive control (MPC), for linear state-delay systems is proposed. The proposed RHC has guaranteed closed-loop stability for wider class of state-delay systems than exiting RHC for state-delay systems. The proposed RHC is obtained by minimizing a new cost function that includes three terminal weighting terms, which are closely rela...

The Internet is playing an important role in information retrieval, exchange, and applications. Internet-based control, a new type of control systems, is characterized as globally remote monitoring and adjustment of plants over the Internet. In recent years, Internet-based control systems have gained considerable attention in science and engineering [1-6], since they provide a new and convenien...

To meet increasingly stringent emission regulations modern internal combustion engines require highly accurate control of the air-to-fuel ratio. The performance of the conventional air-to-fuel ratio feedback loop is limited by the combustion delay between fuel injection and engine exhaust, and by the transport delay for the exhaust gas to propagate to the air-to-fuel ratio sensor location. The ...

This paper investigates the issue of the internal stability of nonlinear delay systems controlled with a feedback law that performs exact input–output, linearization and delay cancellation. In previous works the authors showed that, unlike with the case of systems without state delays, when the relative degree is equal to the number of state variables and the output is forced to be identically ...

In this research work, time-delay adaptive synchronization and anti-synchronization of chaotic fractional order systems are analyzed via the Caputo derivative, prob-lem variable is solved by using PID control law, laws variable-order frac-tional calculus, a law deduced from Lyapunov’s theory extended to calculus. two important problems in area: The first problem described which deals with syn-c...

In this paper, we extend the sliding mode idea to a class of unmatched uncertain variable structure systems. This method is achieved with introducing a new terminal sliding variable and the finite time stability of proposed method is proved using a new particular finite time condition in both reaching and sliding phases. In reaching phase new sliding mode controller is derived to guarantee the ...

Based on fuzzy T-S model and variable structure control technique, adaptive output tracking control problem for fuzzy time-delay systems in the existence of parameter perturbations is developed. Firstly, the sliding mode was chosen by variable structure control theory. By applying the Lypunov stability theory, the design method of adaptive variable structure control is proposed. The use of adap...