Accession Number:

AD0269564

Title:

SYNTHESIS OF LINEAR CONTROL SYSTEMS WITH LOW SENSITIVITY TO PLANT VARIATIONS

Descriptive Note:

Corporate Author:

NEW YORK UNIV N Y SCHOOL OF ENGINEERING AND SCIENCE

Personal Author(s):

Report Date:

1961-05-01

Pagination or Media Count:

1.0

Abstract:

A study of the design of linear control systems insensitive to plant variations is presented. Linear feedback systems, characterized by no direct transmission to the output and plants which have only a single input and a single output, are considered. In such systems, the degree of insensitivity, with respect to plant variations, that can be achieved is limited by three factors. These are the noise generated by the measuring instrument, possibility of plant saturation, and non-minimum phase zeros of the plant. Methods for specifying a systems sensitivity function in the presence of these conflicting requirements are derived. The results are also of value in establishing and limiting the fundamental capability of a passive-adaptive control system to minimize the effects of plant variations. This is of importance if the use of adaptive control is contemplated. Such control is often difficult to implement and is slow in adjusting to the changing environment. For these reasons it should not be used unless a clear superiority over insensitive i.e., passiveadaptive systems can be demonstrated. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE