Genetic algorithms are a powerful tool for the solution of combinatorial problems such as the actuator placement problem. However, they require a large number of analyses with correspondingly high computational costs. Therefore, it is useful to tune the operators and parameters of the algorithm on simple problems that are similar to more complex and computationally expensive problems. The present paper employs an easy-to-calculate measure of actuator effectiveness to evaluate several genetic algorithms. Additionally, the effects of population size and mutation rates are also investigated for a problem of placing actuators at 8 of 1507 possible locations. We find that even with the best of the algorithms and with optimum mutation rates, tens of thousands of analyses are required for obtaining near optimum locations. We propose a procedure that estimates the effectiveness of the various locations and discards ineffective ones, and find it helpful for reducing the cost of the genetic optimization.


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    Title :

    Placing actuators on space structures by genetic algorithms and effectiveness indices


    Additional title:

    Anbringen von Schwingungsdämpfern an Flugkörpern für den Weltraum mit Hilfe von evolutionsstrategischen Algorithmen und Leistungsindices


    Contributors:
    Furuya, H. (author) / Haftka, R.T. (author)

    Published in:

    Publication date :

    1995


    Size :

    7 Seiten, 8 Bilder, 3 Tabellen, 12 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English





    Combining Genetic and Deterministic Algorithms for Locating Actuators on Space Structures

    Furuya, H. / Haftka, R. / American Institute of Aeronautics and Astronautics| ASME| ASCE | British Library Conference Proceedings | 1995




    Locating Actuators for Vibration Suppression on Space Trusses by Genetic Algorithms

    Furuya, H. / Haftka, R. T. | British Library Online Contents | 1993