The estimation of metallurgical parameters of flotation process from froth visual features is the ultimate goal of a machine vision based control system. In this study, a batch flotation system was operated under different process conditions and metallurgical parameters and froth image data were determined simultaneously. Algorithms have been developed for measuring textural and physical froth ...

A numerical approach to feedback investigations allows students to discover easily and quickly the basic effects of feedback, both desirable and undesirable, on automatic control systems. Students can quickly learn the intuitive aspects of feedback early in their study of control systems before they enter, and perhaps become lost in, the world of intense mathematical analysis and design applied...

In this paper, adaptive control is studied for a class of nonlinear discrete-time systems in strict-feedback form with unknown control directions. The system is transformed to an n-step ahead predictor, based on which an adaptive control employing the predicted future states has been proposed. The discrete Nussbaum gain is exploited to overcome the difficulty caused by unknown control direction...

This paper discusses a formal, mathematically-based, approach to the analysis of operator interaction with machines, in general, and with complex and automated control systems, in particular. It addresses the problem of correctness of displays by asking whether the display provides the necessary information about the machine to enable the operator to perform a specified task successfully and un...

abstract in this paper, a fuzzy pid with new structure is proposed to solve the load frequency control in interconnected power systems. in this study, a new structure and effective of the fuzzy pid-type load frequency control (lfc) is proposed to solve the load frequency control in interconnected power systems. the main objective is to eliminate the deviations in the frequency of different area...

The impact of installing process control systems can be expected in terms of performance improvements through reduced operating costs.  Since these installations impose considerable capital expenditure, the profitability of the new systems should be economically justified. Controlled variable trend was reconstructed by a combination of simple waves, which provided a means to simulate the ef...

It has been more than 15 years since digital computers were introduced for process control. Digital control systems have evolved from systems such as the IBM 1710 and 1800 to special controllers that use microprocessors. The hardware cost has dropped considerably, yet the cost of installing computer control systems in sensor based applications has remained relatively high. This is partly ...

Technical reports from the Automatic Control group in Linkping are available by anonymous ftp at the address ftp.control.isy.liu.se. This report is contained in the compressed postscript le 2021.ps.Z. Abstract Identiication of systems operating in closed loop has long been of prime interest in industrial applications. The problem ooers many possibilities, and also some fallacies, and a wide var...

Considering the high consumption of the air compressors, a control system of screw compressor is designed and implemented to deal with energy saving and localization of mentioned compressor. In this paper the variable speed drive (VSD) control algorithm based on proportional-integral-derivative (PID) controller is optimized to decrease power consumption and more stable motor speed and outlet pr...

For linear automatic control systems, many synthesis methods have been developed that exercise options of the controller structure and parameters to provide the stated requirements to the system quality. Coefficient methods can compute approximate, but rather simple, correlations that link the automatic control system quality indices of a random order and the desired controller parameters. One ...