"A worst-case approach to SISO mixed H₂/H_inf control"

1998 IEEE Int. Conf. on Control Applications, CCA98, Trieste, Italy, Sept. 1-4, 1998, Vol. 1, pp. 684-688

This paper presents a worst-case approach to fixed-structure controller design with mixed H₂/H_inf specifications for generalized SISO plants subject to structured/unstructured uncertainties. The design problem is reduced to an equivalent semi-infinite optimization problem for which a global solution can be reached through a genetic/interval algorithm. An example illustrating the design of a PID controller attaining optimal minimax H₂ performance for an uncertain on minimum-phase plant is included.