In this paper the discretisation of switched and non-switched linear positive systems using Padé approximations is considered. Padé approximations to the matrix exponential are sometimes used by control engineers for discretising continuous time systems and for control system design. We observe that this method of approximation is not suited for the discretisation of positive dynamic systems, f...

The paper addresses the problem to design a quadratic stable output/state feedback model predictive control for linear systems with input constraints. In the proposed design technique the model predictive control is designed for N2 step ahead prediction using the Lyapunov function approach with the cost function guaranteeing input constraints. Output gain matrix calculation is realized off line...

This work presents an application of Linear Matrix Inequalities (LMI) for the robust control of an F-16 aircraft through an algorithm ensuring the damping factor to the closed loop system. The results show that the zero and gain settings are sufficient to ensure robust performance and stability with respect to various operating points. The technique used is the pole placement, which aims to put...

The local stability properties of stationary points of the modified Hamiltonian dynamic system are investigated. The modiied Hamiltonian dynamic system characterizes the optimal statecostate trajectories of optimal control problems with discounting defined on an infinite horizon. / It is shown that a Curvature Assumption, introduced by Rockafellar, is sufficient for an optimal steady-state to p...

The paper provides conditions for constrained dynamic output feedback controller to be cost guaranteeing and assuring asymptotic stability for both continuous and discrete-time systems with quadratically constrained nonlinear/uncertain elements. The conditions are formulated in the form of matrix inequalities, which can be rendered to be linear fixing one of the scalar parameters. An abstract m...

in this study, a novel variable impedance control for a lower-limb rehabilitation robotic system using voltage control strategy is presented. the majority of existing control approaches are based on control torque strategy, which require the knowledge of robot dynamics as well as dynamic of patients. this requires the controller to overcome complex problems such as uncertainties and nonlinearit...

objectives: falling in the elderly is common and dynamic balance has direct effect abstract  on it. therefore, we decided to study the effect of functional training on dynamic balance in healthy elderly women. methods & materials: thirty healthy elderly women were purposefully selected as subjects and then randomly divided into two equal groups (control and experimental groups). the dynamic bal...

The modeling of effective product development process can help manage the overall process efficiently and help organize a multifunctional team to develop products in a concurrent and cooperative manner. In this article, a product development process is viewed as a dynamic system with feedback based on the feedback control theory, and a dynamic system model and its design structure matrix are de...

In a deregulated environment, independent generators and utility generators may or may not participate in the load-frequency control of the system. For the purpose of evaluating the performance of such a system, a flexible method has been developed and implemented. The method assumes that load frequency control is performed by an ISO based on parameters defined by the participating generating u...

Controller design strategy for Takagi-Sugeno (T-S) fuzzy systems is considered in the two-degree-of-freedom (TDOF) framework. Firstly, coprime factorization described in the state space formulas for T-S fuzzy systems is introduced based on a common Lyapunov function. Secondly, based on this coprime factorization, TDOF framework for LTI systems is extended to be applied to T-S fuzzy systems. Con...