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Author Ponslet, E. R. ♦ Eldred, M. S.
Source CiteSeerX
Content type Text
File Format PDF
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Baseline Design ♦ Discrete Configuration ♦ Baseline Configuration ♦ Genetic Algorithm ♦ Fixed Property ♦ Reveal Difficulty ♦ Experimental Study ♦ Optimization Method ♦ Discrete Optimization ♦ Available Location ♦ Time Improvement ♦ Dakota Optimization Toolkit ♦ Continuous Optimization ♦ Experimental Limitation ♦ Penalty Function Technique ♦ Ga Search ♦ Isolation System ♦ Poor Design ♦ Vibration Isolation System ♦ Discrete Problem ♦ Alternate Approach ♦ Predicted Performance ♦ Optimized Design ♦ Potential Improvement ♦ Design Constraint ♦ Sandia National Laboratory ♦ Experimental Result ♦ Isolator Location ♦ Vibration Isolation
Description An analytical and experimental study is conducted to investigate the effect of isolator locations on the effectiveness of vibration isolation systems. The study uses isolators with fixed properties and evaluates potential improvements to the isolation system that can be achieved by optimizing isolator locations. Because the available locations for the isolators are discrete in this application, a Genetic Algorithm (GA) is used as the optimization method. The system is modeled in MATLAB ™ and coupled with the GA available in the DAKOTA optimization toolkit under development at Sandia National Laboratories. Design constraints dictated by hardware and experimental limitations are implemented through penalty function techniques. A series of GA runs reveal difficulties in the search on this heavily constrained, multimodal, discrete problem. However, the GA runs provide a variety of optimized designs with predicted performance from 30 to 70 times better than a baseline configuration. An alternate approach is also tested on this problem: it uses continuous optimization, followed by "rounding " of the solution to neighboring discrete configurations. Results show that this approach leads to either infeasible or poor designs. Finally, a number of "optimized " designs obtained from the GA searches are tested in the laboratory and compared to the baseline design. These experimental results show a 7 to 46 times improvement in vibration isolation from the baseline configuration.
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study
Learning Resource Type Article
Publisher Date 1996-01-01
Publisher Institution in Proceedings of the 6th AIAA/USAF/NASA/ISSMO Symposium on Multidisciplinary Analysis and Optimization