Titel  Fett  Univers 55  51  max. 2zeilig

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1 Titel  Fett  Univers 55  51  max. 2zeilig
Autoren  Fett  Univers 45  32 1. Hauptüberschriften  Univers 55  40 In many technical systems the internal states, which are for instance required for control or navigation purposes, are not directly observable and have to be estimated on the basis of uncertain measurements of the system output. Usually a stochastic description is selected and the searched states are calculated by use of a Kalman filter or one of its variations. This work presents new results for state estimation based on noisy observations suffering from an uncertainty, that is noted to be bounded but the exact underlying characteristics are unknown. Subjected to these limitations a new estimator has been developed, that combines three different types of set theoretic state estimation methods with the aim to improve the accuracy of the forecasted position without requiring advanced sensor information. Die benötigten Univers Schriften können Sie sich von der Homepage der Technischen Universität Dresden herunterladen. Rubrik: Coperate Design. Haupttext  Univers 45  28, Textfluss  zweispaltig, blocksatz, Spalte jeweils 34 cm breit. Xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx X S k = \ x y Abbildung 2: Computing the minimal circumscriptions from the intersection in the two dimensional space. X S k ; X S k = \ 0.03 Deviation of in ° 0.05 Mean of in ° 0.22 Deviation of in m 0.23 Mean of in m Multi-Model Estimation Filter r ' ^ Multi-Model Estimation Filter Propagation fusion Measure-ment System true output Estimated output noise input x k = f 1 ; u w v ~ T M X S ! Figure 3: Figure 3a shows the trend of volume for three established forms of set theoretic estimation and the developed filter. In Table 3b the simulation results are displayed with r = q ( x ^ ) 2 + y Simulation results shown in Figure 3 are achieved by using the parameters displayed in Table 1.  Auf dargestellte Bilder oder Tabellen bitte im Text Bezug nehmen. 0.5 in 1/s 90 in s 0.3 in m/s 1 5 radius in m 600 circle trajectory Table 1: Parameters t e n d E v w ( : 2 m ; ) T c 3 x ! M A 5. Zusammenfassung und Ausblick Many estimation issues can be approached as noise problems, where the distribution of the uncertainty is unknown but considered to be bounded. According to this the new estimator provides a framework for solving these problems more precisely than using mentioned methods themselves. Therefor an in this field new method, the parallelepiped set technique, has been combined with two more established procedures, the interval and ellipsoid set technique, in order to compose the multi–model estimator. Furthermore analytical methods for executing the described propagation and measurement fusion has been provided within this work. This work focused on a combined set theoretic filter. In [3,4] a filter is introduced that deals with mixed noise – noise with known distributions and noise with known bounds. A next step in the further development of the introduced filter may be to transfer this attempt to broaden the potential area of application. Abbildung 1: Bildunterschriften  Univers 45  24 2. The multi-model estimation concept Quellen nach der Reihenfolge ihres Auftretens im Text sortieren. Postersprache  Deutsch, Posterformat  A0, Hinweis: der Ausdruck eines Posters kann recht preiswert (preiswerter als Copyshop) im Rechnerpool des Zeunerbaus durchgeführt werden, Öffnungszeiten beachten und am besten mal vorher anrufen, ob die Damen gerade auch Zeit haben. 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Quellenangaben [1] Alefeld G., Herzberger J., “Introduction to Interval Computations”, Academic Press, New York, (1983) [2] Hanebeck U.D., Schmidt G., “Mobile Robot Localization Based on Efficient Processing of Sensor Data and Set-theoretic State Estimation“, Fifth International Symposium on Experimental Robotics (ISER'97), pp , Barcelona, Spain, (1997) [3] Hanebeck U.D., Horn J., “New Estimators for Mixed Stochastic and Set Theoretic Uncertainty Models: The Vector Case”, Proceedings of the fifth European Control Conference (ECC’99), Karlsruhe, Germany,(1999) [4] Hanebeck U.D., Horn J., “New Results for State Estimation in the Presence of mixed Stochastic and Set Theoretic Uncertainties ”, Proceedings of the 1999 IEEE International Systems, Man and Cybernetics Conference (SMC’99), Tokyo, Japan, (1999) [5] Horn S., „Anwendung mengenbasierter Schätzverfahren zur Lokalisierung von mobilen Plattformen in ebenen Umgebungen”, Diplomarbeit, Technische Universität Dresden, Fakultät für Elektrotechnik und Informationstechnik, (2003)