Archive | ISA Transactions

steam-turbine-condenser

Multi-Objective Control of Nonlinear Boiler-Turbine Dynamics

Abstract: This paper investigates multi-objective controller design approaches for nonlinear boiler-turbine dynamics subject to actuator magnitude and rate constraints. System nonlinearity is handled by a suitable linear parameter varying system representation with drum pressure as the system varying parameter. Variation of the drum pressure is represented by suitable norm-bounded uncertainty and affine dependence on system matrices. […]

Continue Reading · 0
pharmaceutical-production-line-efficiency

Plant-Wide Control: Eco-Efficiency and Control Loop Configuration

Abstract: Since the eco-efficiency of all industrial processes/plants has become increasingly important, engineers need to find a way to integrate the control loop configuration and the measurements of eco-efficiency. A new measure of eco-efficiency, the exergy eco-efficiency factor, for control loop configuration, is proposed in this paper. The exergy eco-efficiency factor is based on the thermodynamic […]

Continue Reading · 0
generalized regression neural network structure

Development and Comparison of Neural Network-Based Soft Sensors

Abstract: The online estimation of process outputs mostly related to quality, as opposed to their belated measurement by means of hardware measuring devices and laboratory analysis, represents the most valuable feature of soft sensors. As of now there have been very few attempts for soft sensing of cement clinker quality which is mostly done by offline […]

Continue Reading · 0
configuration-of-the-experimental-set-up-for-BRB-detection

Diagnosis of Broken-Bars Fault in Induction Machines Using Higher Order Spectral Analysis

Abstract: Detection and identification of induction machine faults through the stator current signal using higher order spectra analysis is presented. This technique is known as motor current signature analysis (MCSA). This paper proposes two higher order spectra techniques, namely the power spectrum and the slices of bi-spectrum used for the analysis of induction machine stator current […]

Continue Reading · 0
PID-control-system-architecture

Fuzzy Model Based Adaptive PID Controller Design for Nonlinear and Uncertain Processes

Abstract: We develop a novel adaptive tuning method for classical proportional–integral–derivative (PID) controller to control nonlinear processes to adjust PID gains, a problem which is very difficult to overcome in the classical PID controllers. By incorporating classical PID control, which is well-known in industry, to the control of nonlinear processes, we introduce a method which can […]

Continue Reading · 0
20150807-2

Centralized and Distributed Control Architectures under Foundation Fieldbus Network

Abstract: This paper aims at discussing possible automation and control system architectures based on fieldbus networks in which the controllers can be implemented either in a centralized or in a distributed form. An experimental setup is used to demonstrate some of the addressed issues. The control and automation architecture is composed of a supervisory system, a […]

Continue Reading · 0
Robust Control of Uncertain Switched Systems

Robust Control of Uncertain Switched Systems

Abstract: This paper considers the control problem of a class of uncertain switched systems defined on polyhedral sets known as piecewise linear systems where, instead of the conventional Caratheodory solutions, Filippov solutions are studied. In other words, in contrast to the previous studies, solutions with infinite switching in finite time along the facets and on faces […]

Continue Reading · 0

Stochastic Behavior Analysis of Complex Repairable Industrial Systems Utilizing Uncertain Data

Abstract: The purpose of this paper is to present a novel technique for analyzing the behavior of an industrial system stochastically by utilizing vague, imprecise, and uncertain data. In the present study two important tools namely Lambda-Tau methodology and particle swarm optimization are combinedly used to present a novel technique named as particle swarm optimization […]

Continue Reading · 0