Design of an efficient algorithm for fuel-optimal look-ahead control
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چکیده
منابع مشابه
Design of an efficient algorithm for fuel-optimal look-ahead control
A fuel-optimal control algorithm is developed for a heavy diesel truck that utilizes information about the road topography ahead of the vehicle when the route is known. A prediction model is formulated where special attention is given to properly include gear shiing. e aim is an algorithm with suciently low computational complexity. To this end, a dynamic programming algorithm is tailored, an...
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The road topography in highways affects the powertrain control of a heavy truck substantially since the engine power is low in relation to the vehicle weight. In large road gradients constant speed is not possible to keep, which would have been beneficial otherwise, and in some uphills shifting gears becomes inevitable. If information about the road ahead, i.e. look ahead information, is availa...
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The Lagrange multiplier for the kinetic energy e is shown to be −γcm on a singular arc, where γ (g/J) is derived from engine and driveline characteristics and cm ≈ 1. Using this value as an approximation for constrained arcs as well, the cost function is J(s, x) ≈ −γcme + C(s) that yields the residual cost φ(x) = −γcme. The factor β corresponds to the constant Lagrange multiplier for time and i...
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ژورنال
عنوان ژورنال: Control Engineering Practice
سال: 2010
ISSN: 0967-0661
DOI: 10.1016/j.conengprac.2009.12.008