Abstract
The problem of designing feedback control system for marine propulsion plant using recently developed algebraic results which enable non-interaction in the combined compensator and linearised system model to be attained, will be considered. A relaxation of the complexity of the decoupling scheme such that a condition of weakened interaction or "diagonal dominance" is achieved in the inverse matrix representing the compensator and plant, series combination, is then advocated and computer aided designs based on the inverse Nyquist array method, are investigated. The systematic procedure for the achievement of decoupling is illustrated by employing the procedure to synthesise a multivariable feedback regulating scheme using the validated linearised model of a naval gas turbine -variable pitch propeller propulsion system. A computer study showing the scheme under closed-loop control is included and the transient performance exhibited, following step changes on each input, is commented on.
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