Rajakkannu Mutharasan

Stabilization of linear system behaviour by pole shifting

The problem of determining the output feedback control matrix such that the system is as stable as possible is considered from the point of view of minimizing the real part of the least stable eigenvalue of the system. To ensure reasonable control and system behaviour, minimum and maximum constraints are placed on each element of the feedback matrix. An effective algorithm is given to carry out the pole shifting. The feasibility of the approach is illustrated with an eight-state three-feedback linearized model of a divided winding rotor synchronous machine and a linear six-plate gas absorber.

Sampled-data control of a nonlinear system

Abstract Sampled-data proportional control of an exothermic CSTR has been studied using the classical linear analysis and by the application of the averaging te

Application of series approximation to the analysis of a CSTR with time-delay

The behaviour of a non-linear continuous stirred tank reactor (CSTR) with time-delay in the feedback control is determined by expanding the delay factors by means of a series approximation. The resulting system approximates the original system quite well, and is considerably easier to analyse. The region of stability obtained by this method is substantially larger than that obtained by the application of Liapunovs method.