Accession Number : ADA323163

Title :   Advanced Control System Development and Analysis.

Descriptive Note : Final rept.,

Corporate Author : SRI INTERNATIONAL MENLO PARK CA

Personal Author(s) : Titterton, Paul J. ; Nowlin, William C.

PDF Url : ADA323163

Report Date : MAR 1997

Pagination or Media Count : 123

Abstract : The purpose of this project was to develop an advanced control law synthesis method and apply it to naval noise and vibration problems. Our research was focused along four main paths. Following the Scientific Officer's guidance, we worked to form these paths into a cohesive plan. Our task list comprises: (1) Practical robust control design for structures with observed variability; (2) Description of variability for robust control law design; (3) Cradle characterization experiment design and analysis, and (4) EM signature work. The results of these tasks are described below. The primary result of this contract is SRI's specification based control law synthesis methodology and its practical realization in the software package titled MINCODE (for MIxed Norm COntroller DEsign). MINCODE synthesizes control laws that directly represent the constraints that occur in real-world fieldable systems. Additionally, MINCODE guarantees that this control law yields the best possible performance. No other controller, designed by any other means, will exceed this performance without violating the real-world constraints. This best-performance property enables us to compute optimal tradeoff surfaces for (say) vibration reduction, actuator authority, and stability robustness. These optimal tradeoff surfaces are of obvious utility to the control designer and are unavailable by any other means. Other results of this contract include: (1) preliminary development of a method for describing plant variability from measured data, (2) preliminary development of a method for incorporating that description of variability into MINCODE to improve performance while maintaining robustness, (3) analysis of critical issues in the Cradle characterization experiments, (4) analysis of existing EM signature work, and (5) modeling and simulation of an improved EM signature system.

Descriptors :   *COMPUTER PROGRAMS, *CONTROL SYSTEMS, *SYSTEMS ENGINEERING, SIMULATION, VIBRATION, OPTIMIZATION, NAVY, PATHS, REDUCTION, VARIATIONS, SURFACES, ELECTROMAGNETIC RADIATION, YIELD, SIGNATURES, GUIDANCE, NOISE, CONTROL THEORY, TRADE OFF ANALYSIS, OFFICER PERSONNEL.

Subject Categories : Computer Programming and Software
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE