Archive | ISA Transactions

An-opto-isolator-based-linearization-technique-of-a-typical-thyristor-driven-pump

Opto-Isolator Based Linearization Solution for a Thyristor-Driven Pump

Abstract: A thyristor driven pump is operated by varying the DC input signal in the firing circuit of thyristor drive. This operation suffers from difficulties due to the nonlinear relation between thyristor output and DC input. In the present paper, an opto-isolator based linearization technique of a typical thyristor driven pump has been proposed.   The […]

Continue Reading · 0
enhanced-industrial-alarm-data

Improved Correlation Analysis and Visualization of Industrial Alarm Data

Abstract: The problem of multivariate alarm analysis and rationalization is complex and important in the area of smart alarm management due to the interrelationships between variables. The technique of capturing and visualizing the correlation information, especially from historical alarm data directly, is beneficial for further analysis. In this paper, the Gaussian kernel method is applied to […]

Continue Reading · 0
chemical-plant-distillation-technical

Batch Distillation Employing Cyclic Rectification

Abstract: Several strategies have been proposed to increase the operating efficiency of batch distillation. In this study, conventional batch rectification and inverted batch stripping are used cyclically to promote high product flow rates for a binary fractionation. Process controls are implemented to maintain constant product purity specifications by varying the slope of the operating line. While […]

Continue Reading · 0
coordinated-MIMO-control-design-power-plant

Coordinated MIMO Control Design for a Power Plant

Abstract: For the participation of the steam power plants in regulating the network frequency, boilers and turbines should be co-ordinately controlled in addition to the base load productions. Lack of coordinated control over boiler–turbine may lead to instability; oscillation in producing power and boiler parameters; reduction in the reliability of the unit; and inflicting thermodynamic tension […]

Continue Reading · 0
PLC-performance-enhancement

PLC Performance Enhancement by Field Programmable Gate Array Design

Abstract: PLC, the core element of modern automation systems, due to serial execution, exhibits limitations like slow speed and poor scan time. Improved PLC design using FPGA has been proposed based on parallel execution mechanism for enhancement of performance and flexibility. Modelsim as simulation platform and VHDL used to translate, integrate and implement the logic circuit […]

Continue Reading · 0
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