In [8] we obtained stabilizing PID controllers for a class of MIMO unstable plants with time delays in the input and output channels (I/O delays). Using this approach, for plants with one unstable pole, we investigate resilient PI and PD controllers. Specifically, for PD controllers, optimal derivative action gain is determined to maximize the allowable controller gain interval. For PI controll...

Classical proper PID controllers are designed for linear time invariant plants whose transfer functions are rational functions of s , where 0 < α < 1, and s is the Laplace transform variable. Effect of input–output time delay on the range of allowable controller parameters is investigated. The allowable PID controller parameters are determined from a small gain type of argument used earlier for...

in order to evaluate the effect of different levels of drought stress and nitrogen fertilizer on growth of strawberry plants, present study was conducted in the mazandaran province in 2010. experiment was carried out as factorial based on randomized complete block design with three replications. drought stress treatments (30, 50 and 70% maximum allowable depletion of moistur (mad)) and nitrogen...

Meyer and Pradhan proposed the MS (for “mixed-sum”) algorithm to solve the Byzantine Agreement (BA) problem with dual failure modes: arbitrary faults (Byzantine faults) and dormant faults (essentially omission faults and timing faults) [3]. Our study indicates that this algorithm uses an inappropriate method to eliminate the effects of dormant faults and that the bound on the number of allowabl...

ABSTRACT A new model reduction approach is proposed. The order of a large-scale system is reduced within the neighborhood of its crossover frequency in order to closely preserve the gain and phase of the original system. The minimum and maximum allowable frequency about the crossover frequency of the system is determined using frequency dependent weights. Then the system is perturbed and reduce...

This paper describes the virtual assembly automation systems, as decision support systems, for the better knowledge of assembly operation. The study of this procedure is described as well as the necessity for assembly systems design. The work draws on research into product and manufacturing knowledge models. In this paper, the authors have proposed a virtual prototype model for assembly system ...

As part of the energy efficient system modeling, which is of interest amongst all areas of research in industry and academia, this paper proposes a design of energy efficient Ethernet access system. The model estimates the feasibility of operating the network interface component under power saving modes, without compromising on the quality of service. In order to prevent degradation of the serv...

It has been argued that repetitive member allowable property adjustments should be larger for high-variability materials than for low-variability materials. We report analytic calculations and simulations that suggest that the order of such adjustments should be reversed, that is, given the manner in which allowable properties are currently calculated, as the coefficient of variation of the str...