Justification and Limitation of a 2-Parameter 2-Adjustment Self-Adaptive System

Various specific cases of systems employing a plant with large variations in two parameters together with the existence of additive measurement noise in the output are analyzed. These systems include both two-degree-of-freedom conventional passive systems, and self-adaptive systems. It is shown that the reduction of the effects of the measurment noise justifies the employment of a plant-adaptive system. The requirement of a minimum measurement time is shown to be a fundamental limitation of the self-adjusting system. Procedures are outlined for the estimation of the reduction in measurement noise responses and for the estimation of the minimum measurement time.