In this paper, we present a further mathematical study on the report of existence of n-scroll chaotic attractors in a modified Chua’s circuit. A series of results based on mathematical theory are given. First, we show that the chaotic attractors of the modified Chua’s circuit are globally attractive, with estimations given for the globally attractive set and positive invariant set. Then, we stu...

We assume, for a distributed parameter control system, that a linear stabilizing feedback is available. We then seek a stabilizing feedback, necessarily nonlinear, subject to an a priori bound on the control.

This paper presents the stability analysis of a fuzzymodel-based control system consisting of a nonlinear plant and a nonlinear state feedback controller and the design of the nonlinear gains of the controller. The nonlinear plant is represented by a fuzzy model having rules. A nonlinear state feedback controller is designed to close the feedback loop. Under this design, the stability condition...

A simulation and animation tool for education in multivariable control is presented. The purpose of the tool is to support studies of various aspects of multivariable dynamical systems and design of multivariable feedback control systems. Different ways to use this kind of tool in control education are also presented and discussed.

Monotone systems constitute one of the most important classes of dynamical systems used in mathematical biology modeling. The objective of this paper is to extend the notion of monotonicity to systems with inputs and outputs, a necessary first step in trying to understand interconnections, especially including feedback loops, built up out of monotone components. Basic definitions and theorems a...

Feedback control is a control mechanism that uses information from measurements. In a feedback control system, the output is sensed. There are two main types of feedback control systems: 1) positive feedback 2) negative feedback. The positive feedback is used to increase the size of the input but in a negative feedback, the feedback is used to decrease the size of the input. The negative system...

Increasing demands in performance and quality make drive systems fundamental parts in the progressive automation of industrial process. The analysis and design of Mechatronics systems are often based on linear or linearized models which may not accurately represent the servo system characteristics when the system is subject to inputs of large amplitude. The impact of the nonlinearities of the d...

This paper proposes a general modeling framework adapted to the feedback control of traffic flows in Eulerian models of the National Airspace System (NAS). It is shown that the problems of scheduling and routing aircraft flows in the NAS can be posed as the control of a network of queues with load-dependent service rates. We can then focus on developing techniques to ensure that the aircraft qu...

The objective of this paper is to describe a control technique that can be use in a supply chain environment. A multi-product, multi-stage manufacturing system was built and simulation was used to analyse the system behaviour. System benefits were investigated based on the behaviour of the following performance measures: flow time, lateness, work in progress and production cost.

In this case, the blood-pressure regulation system of a mammal was considered. In general, blood pressure is considered the amount of outward force exerted on the arterial walls. This is determined by cardiac output, which is the heart rate multiplied by the stroke volume of the heart. Blood pressure is thus inversely proportional to the radius of the arteries, which is controlled by the sympat...