H∞ Measurement-feedback Control for Systems with Input and Measurement Delays

The paper concentrates on finding the H∞ measurement-feedback control-law for systems with not only an input-delay but also a measurement-delay. Krein space, together with pseudo-measurements, is introduced so that the reorganizing technique can be utilized after we convert the original problem into a minimizing one. Finally, we get the desired controller and see that the separation principle is also applicable to delay systems to some extent.