Multilevel Approach Applied to Control System Design

[+] Author and Article Information
I. Lefkowitz

Systems Research Center, Case Institute of Technology, Cleveland, Ohio

J. Basic Eng 88(2), 392-398 (Jun 01, 1966) (7 pages) doi:10.1115/1.3645868 History: Received July 06, 1965; Online November 03, 2011


An approach to control system design is described, based on an extension of the multilevel control concept. In essence, the problem is divided into simpler subproblems: (a) The controlled process is decomposed into a number of subprocesses, each with its own control system operating on a local suboptimal performance criterion; (b) each subprocess controller is decomposed into a hierarchy of control functions which distribute the load and responsibility for satisfying the control objective. The primary effort of the paper is in the development of the control hierarchy as a useful concept in control system design and implementation. The hierarchy is described in the context of the multilevel approach; however, an important distinguishing feature is the association of levels with disturbance sets roughly classified according to the frequency dependency of their effects on the overall performance. Also associated with the hierarchy is an ordering with respect to time scale, complexity of computation, degree of uncertainty, and so on, which relate to important design considerations for the overall system.

Copyright © 1966 by ASME
Your Session has timed out. Please sign back in to continue.





Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In