the form of graphs in which the discharge current is an i n d e p e n d e n t v a. r i ab 1 e . (A u t h o r) Source of Abstract (Subfile): AIAA/TIS Keywords: *CARBON DIOXIDE LASERS; ♦GAS DISCHARGE TUBES; ♦LASER OUTPUTS ; ♦OPTICAL PUMPING; ♦VIBRATIONAL SPECTRA; ♦WAVEGUIDE LASERS; COMPUTERIZED SIMULATION; ENERGY CONVERSION EFFICIENCY; LINEAR AMPLIFIERS; MOLECULAR EXCITATION; OSCILLATORS; POWER GAIN Subject Classification: 7536 Lasers Masers (1975--) Structural analysis of partially decentralized monitoring Application to the diagnosis of material breakdowns in a solar power plant. (French thesis). Ana1yse structura1e de 1'observation partie11ement decentral i see --Application au diagnostic des pannes materi el les sur une centrale solaire. NERIN, G. Toulouse, Inst itut National des Sciences Appliquees, Docteur-Ingenieur Thesis, 1984, 370 p. In French. 203 Refs. I. .. a n g u a g e: F r e n c h . Country of Origin: France. Country of Publication: France Document Type: THESIS Most documents available from AIAA Technical Library Journa1 Announcement: IA A8506 An automatic contro1 mode1 is deve1oped for imp1ement at ion in aut omat ed mon i t oring of the f unc t i ona1 status of components of a complex system. The structural state space of the system is evaluated on the bases of sensor data, subsystem states, and sampling intervals. Li near and/or fracta1 aggregate state spaces are defi ned for preserving the states subject to disruption. The aggregates utilize internal homothetic operators generated by a number of parameters always less than the dimension of the stat e space. A re1ationship is estab1ished between cause and effect (data analysis and pattern recognition). A minimal structural representation is defined for the states by means of an ascending hierchica1 c1 assifi cati on, wh i1e the state space i s data dependent and the observer set is a fuzzy set. Account is taken of uncertai nt i es i ntroduced by par ts of the system and observer sensors. The method is illustrated in terms of maintaining the pointing accuracy and optimal functioning of the Themis solar power plant heliostat field and other components. A modification is proposed for correcting a fault in the pointing control of the actual system. (M.S.K. ) Source of Abstract (Subfi1e) : AIAA/TIS Keywords: ♦AUTOMATIC CONTROL; ♦COMPLEX SYSTEMS; ♦CONTROL THEORY; ♦CONTROLLED SYSTEMS DESIGN; ♦FUZZY SETS; ♦OBSERVABILITY (SYSTEMS); ♦SOLAR GENERATORS; AUTOREGRESSIVE PROCESSES; BREAKDOWN; COMPUTERIZED SIMULATION; ENERGY CONVERSION EFFICIENCY; HEAT EXCHANGERS; HEAT STORAGE; HELIOSTATS; INFORMATION THEORY; POINTING CONTROL SYSTEMS; POWER CONDITIONING; SET THEORY; STATE VECTORS; STOCHASTIC PROCESSES Subject Classificatian: 7563 Cybernetics (1975)
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