Optimal driving strategy for a solar car on a level road |
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Authors: | HOWLETT, PHIL PUDNEY, PETER TARNOPOLSKAYA, TANIA GATES, DAVID |
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Affiliation: | Centre for Industrial and Applied Mathematics, University of South Australia, The Levels Australia 5095 CSIRO Division of Mathematics and Statistics PO Box 1965, Canberra, Australia 2061 |
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Abstract: | Every three years, solar cars from all over the world come toAustralia to participate in the World Solar Challenge. In 1993there were 52 cars in the race. Five cars finished within fivedays, each one breaking the previous race record and achievingan average speed exceeding 70 km/h. The performance of thesecars depends on many factors: power, aerodynamics, tractionefficiency, weight, reliability, and (not least of all) drivingstrategy. On a level road, the optimal driving strategy foran ideal car is essentially a speed-holding strategy. For areal car with inefficient energy storage, however, there aretwo distinct holding speeds. The lower speed is held when solarpower is low and must be supplemented from stored energy. Theupper speed is held when solar poler is high, and excess energyis stored. |
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