Multi-variable Geometry Repair and Optimization of Passive Vibration Isolators

Alexander Forrester, Andy Keane
2007 48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference   unpublished
A range of techniques are considered for the search of a high dimensional design landscape with extensive, unknown and disjointed regions of infeasibility. We present the use of a hybrid genetic-algorithm / gradient-descent search of the objective function / feasibility problem. The genetic algorithm is used to optimize the vibration isolation of a novel passive structure concept, while the gradient descent method is used to repair infeasible geometries. For a more complicated structure the
more » ... d structure the gradient search fails to find feasible geometries and we resort to a non-dominated sorting multi-objective genetic algorithm which searches the vibration isolation and geometry feasibility simultaneously. Although the complicated geometry is more difficult to optimize, there is potential for significant improvements in vibration isolation. * Member AIAA. Research Fellow, Computational Engineering and Design Group. † Professor of computational engineering, Computational Engineering and Design Group.
doi:10.2514/6.2007-1923 fatcat:dw2ylxxkizcutc774st22jnnju