Sensitivity of Lower Order Observers.
Abstract
The problem of sensitivity of dynamic systems to changes in parameters is of great importance because, in physical realization of automatic control systems, changes in the parameters always are encountered -- as a result of aging of the elements, effects of the external environment, interactions with other systems, etc. Contemporary automatic control systems often are realized as systems of variable structure where the possibility of varying the parameters of the system is specially introduced to obtain adaptation properties. In all these cases, the question arises as to how the behavior of the system changes when changes occur in certain of its parameters. One such system of interest is the lower order observer or lower order estimator. Determination of changes in the performance of the lower order observer to changes in parameters is of great importance in engineering analysis and design. The significance of using lower order observers instead of a full order observer, when a few states are needed to be estimated, is of an economical nature. Sometimes it is needed that the estimated state be highly nonsensitive to parameter variations, the economic reasons are then superseded by sensitivity. Therefore, a comparison in sensitivity is needed between the lower order, and full order, observers.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1977
- Accession Number
- ADA042645
Entities
People
- Erwin De Sa
Organizations
- University of Illinois Urbana–Champaign