In this note we consider the stability properties of a system class that arises in the control design problem of switched linear systems. The control design we are studying is based on a classical pole-placement approach.We analyse the stability of the resulting switched systemanddevelop analytic conditionswhich reduce the complexity of the stability problem. We further consider two special cas...

Direct voltage fluctuations due to the presence of relatively large DC reactors (as an essential part HVDC breakers), lack inertia, and unwanted frequency in AC side grids, have major consequences on stability HVAC/HVDC grids. The use Power System Stabilizer (DC-PSS) can damp eliminate oscillations caused by reactors. However, DC-PSS cannot address issues inertia fluctuations. A method improve ...

A linear matrix inequalities (LMIs) framework for developing robust, adaptive nonlinear flight control systems is presented. The controller structure is that of a feedforward sigmoidal neural network that is both adaptive and reconfigurable, since the control law it approximates can be modified by updating its parameters during operation. The neural network controller is designed via LMIs to me...

This paper presents a robust mixed-sensitivity H1 controller design via loop-shaping methodology for a class of multiple-input multiple-output (MIMO) uncertain nonlinear systems. In order to design this controller, the nonlinear plant is first modeled as several linear subsystems by Takagi and Sugeno’s (T–S) fuzzy approach. Both loop-shaping methodology and mixed-sensitivity problem are then in...

The linearised complex Ginzburg–Landau equation is a model for the evolution of small fluid perturbations, such as in a bluff body wake. By implementing actuators and sensors and designing an H2 optimal controller, we control a supercritical, infinite-domain formulation of this system. We seek the optimal actuator and sensor placement that minimises the H2 norm of the controlled system, from fl...

The RECCo control algorithm, presented in this article, is based on the fuzzy rule-based (FRB) system named ANYA which has non-parametric antecedent part. It starts with zero fuzzy rules (clouds) in the rule base and evolves its structure while performing the control of the plant. For the consequent part of RECCo PID-type controller is used and the parameters are adapted in an online manner. Th...

A general framework for local linear control of nonlinear nonautonomous systems using feedback strategies is considered. In particular, it is shown that a parametrically excited nonlinear system exhibiting chaos can be driven to a desired periodic motion or to a fixed point by designing a combination of a feed forward controller and a feedback time-periodic controller. The design of feedback co...