SYNTHESIS OF UNCERTAIN CASCADED MULTIPLE LOOPS SYSTEMS WITH TIME-DELAY

This paper presents a frequency domain design method for uncertain cas caded multiple loops systems with time delays. It is shown that the pl ant uncertainties and time delays can be transferred to the values of equivalent external disturbances at the plant output. Thus, the contro l design problem coping with parametric and time delay uncertainties c an be treated as an equivalent external disturbance attenuation proble m. An example is provided to illustrate the proposed design method. (C ) 1997 The Franklin Institute. Published by Elsevier Science Ltd.