Abstract
ABSTRACT Like linear systems, the state and disturbance observers for bilinear systems must be considered in order to realize the state feedback and/or disturbance feedforward control in the case where some of the states and/or disturbances are unmeasurable. This paper first addresses the design issue of minimal order state observers for bilinear systems; then discusses a new method of designing minimal order state-disturbance composite observers. Finally, the application of this state-disturbance composite observer to the headbox control system in the papermaking process is presented as an example. The simulation results and on-line performance evaluation for this composite observer are discussed.
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