Accession Number : AD0840316

Title :   A PIECEWISE-LINEAR SWITCHING FUNCTION FOR QUASI-MINIMUM-TIME CONTROL.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Althouse, Thomas Stephenson

Report Date : JUN 1968

Pagination or Media Count : 73

Abstract : The design of controllers to provide quasi-minimum time-response is investigated. With the control law to be realized as a piecewise-linear combination of the instantaneous state values, the problem is to select the parameters which define the best suboptimal switching surface. A worst-case response-time performance index is defined and shown to be suitable for use in the suboptimal controller design. A proposed design technique is described and used to determine controllers for second-order systems. The results of the illustrative examples are compared with controllers designed using a least squares polynomial fitting technique. The comparison shows that the proposed method designs significantly better controllers in terms of deviation from optimal response time. (Author)

Descriptors :   (*CONTROL SYSTEMS, SPECIAL FUNCTIONS(MATHEMATICAL)), OPTIMIZATION, TRANSFER FUNCTIONS, LEAST SQUARES METHOD, CURVE FITTING, FLOW CHARTING, COMPUTER PROGRAMS, SIMULATION, RELAYS, THESES.

Subject Categories : Statistics and Probability

Distribution Statement : APPROVED FOR PUBLIC RELEASE