International Journal of Control, Vol.71, No.3, 437-458, 1998
On the time-domain performance of multivariable systems in response to fixed inputs
The synthesis of compensators for tracking applications in LTI discrete-time systems is investigated from the time-domain perspective. The problem of simultaneously minimizing the 'size' of the error and control-input signals to specific reference inputs is considered. The control problem is expressed in a linear programming framework, in which the weighted sum of el-norms of the error and control-inputs in each channel is minimized, subject to time-domain constraints. The Youla parametrization is used to obtain the feasible set of all admissible error and control-input pairs from which a stabilizing compensator can be synthesized. The flexibility of the method is illustrated by application to novel types of time-domain constraints, and demonstrated by the use of a numerical example.