Interactive of Package Multivariable for Analysis Control and Systems Synthesis F. Gadzinski*, University of J.H. Anderson, P. Waterloo, Ontario, Anand Canada ABSTRACT This paper describes an interactive-package for designing multivariable control systems. It is assumed that a model of the system, either in the form of a matrix of transfer functions or in state-space form is known. The design procedure is by successive analysis. In each iteration the designer checks the stability and transient response of the system. The package is implemented on a PDP-9 computer with precision display, disk, line printer and teletype. Keywords Software systems. INTRODUCTION The classical frequency methods of designing a control system are familiar to control systems designers and include in the design procedure such requirements as overshoot, rise time, amplitude and phase stability margins. These methods deal with single loop systems and therein lies the difficulty in applying them to multivariable systems. Designing multivariable systems as a set of single loops, does not take into consideration interaction between the loops and may cause degradation in system performance and system instability. Optimal control theory supplies a required theoretical base for designing multivariable control systems. Unfortunately, it requires accurate system models and measurability of
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