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2014 | 24 | 3 | 551-566

Tytuł artykułu

High-performance simulation-based algorithms for an alpine ski racer's trajectory optimization in heterogeneous computer systems

Autorzy

Treść / Zawartość

Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
Effective, simulation-based trajectory optimization algorithms adapted to heterogeneous computers are studied with reference to the problem taken from alpine ski racing (the presented solution is probably the most general one published so far). The key idea behind these algorithms is to use a grid-based discretization scheme to transform the continuous optimization problem into a search problem over a specially constructed finite graph, and then to apply dynamic programming to find an approximation of the global solution. In the analyzed example it is the minimum-time ski line, represented as a piecewise-linear function (a method of elimination of unfeasible solutions is proposed). Serial and parallel versions of the basic optimization algorithm are presented in detail (pseudo-code, time and memory complexity). Possible extensions of the basic algorithm are also described. The implementation of these algorithms is based on OpenCL. The included experimental results show that contemporary heterogeneous computers can be treated as μ-HPC platforms-they offer high performance (the best speedup was equal to 128) while remaining energy and cost efficient (which is crucial in embedded systems, e.g., trajectory planners of autonomous robots). The presented algorithms can be applied to many trajectory optimization problems, including those having a black-box represented performance measure.

Rocznik

Tom

24

Numer

3

Strony

551-566

Opis fizyczny

Daty

wydano
2014
otrzymano
2013-08-20
poprawiono
2014-02-21

Twórcy

  • Department of Computer Science, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Kraków, Poland

Bibliografia

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  • Brodie, M. (2009). Development of Fusion Motion Capture for Optimisation of Performance in Alpine Ski Racing, Ph.D. thesis, Massey University, Wellington.
  • Byrski, A., Dębski, R. and Kisiel-Dorohinicki, M. (2012). Agent-based computing in an augmented cloud environment, Computer Systems Science and Engineering 27(1): 7-18.
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  • Gaster, B.R., Howes, L.W., Kaeli, D.R., Mistry, P. and Schaa, D. (2013). Heterogeneous Computing with OpenCL-Revised OpenCL 1.2 Edition, Morgan Kaufmann, Waltham, MA.
  • Harish, P. and Narayanan, P. (2007). Accelerating large graph algorithms on the GPU using CUDA, in S. Aluru, M. Parashar, R. Badrinath and V. Prasanna (Eds.), High Performance Computing-HiPC 2007, Springer, Berlin, pp. 197-208.
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Typ dokumentu

Bibliografia

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