Constrained control of hot air blower system under output delay using globally stable performance-based anti-windup approach

Abstract

This paper describes the design and implementation of a linear controller with an Anti-Windup Compensator (AWC) for a hot air blower system having output delays, under actuator saturation constraint and noise. Traditional Anti-Windup (AW) schemes for timedelay systems are based on either local stability or global stability with performance restrictions. We modify an existing AWC architecture using a time-delay term in the compensator in order to ensure global stability and performance. It is also shown that the existing Linear Matrix Inequalities (LMIs) based optimization schemes for AWC, which are derived using the decoupled architecture and coprime factorization, can be applied to the modified AWC architecture. This modified delay independent AWC scheme is applied to a hot air blower system and practical results are discussed. This paper aims to support the industrial application of the modified AWC ensuring global stability and performance, by applying it to a hot air blower system under actuator situation and output delay as well as electrical and thermal noises.

Regional System Identification and Computer Based Switchable Control of a Nonlinear Hot Air Blower System

“…Table 1. In order to build a relation between the measured voltage signal V and the corresponding temperature T, the following calibration equation is used (see also [1]): Figure 2 shows the actual plot between the measured signal V and temperature output T and plot obtain by third order polynomial of (1). It can be seen in Figure 2 that the error between the actual curve and calibration equation is small.…”

“…Different classical techniques are being adopted for the temperature control applications. In [1][2], modeling and linear controller design techniques are discussed for temperature control. In [3][4], linear robust controller design framework based on linear model is proposed for level and temperature control of a nonlinear three tank system.…”

“…Temperature control systems are generally non-linear in nature. Such systems are controlled by both linear and nonlinear controllers [1][2][3][4]. Linear controllers are easy to design but their performance cannot be very good.…”