SYNTHESIS OF LINEAR CONTROL SYSTEMS WITH LOW SENSITIVITY TO PLANT VARIATIONS
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 system's 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)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1961
- Accession Number
- AD0269564
Entities
People
- Paul E. Fleischer
Organizations
- New York University