000			01716nab a2200217 4500
005			20260520003108.0
008			260224s2015 xxu ing
041			_aInglés
245	0	0	_aDevelopment of Look-Ahead Controller Concepts for a Wheel Loader Application
260			_a _b _cene./feb. 2015
270			_a14/09/2015 ; 14/09/2015
300			_a19 p. ; 159-178
520			_aTranscripción del resumen del autor: This paper presents two conceptual methods, based on dynamic programming, for one-step look-ahead control of a Continuously Variable Transmission (CVT) in a wheel loader. The first method developed, designated Stochastic Dynamic Programming (SDP), uses a statistical load prediction and stochastic dynamic programming for minimizing fuel use. The second method developed, designated Free-Time Dynamic Programming (FTDP), has vehicle speed as a state and introduces a fixed 0.1 s delay in the bucket controls in a combined minimization of fuel and time. The methods are evaluated using a set of 34 measured loading cycles, used in a ‘leave one out’ manner. The evaluation shows that the SDP method requires about 1/10th of the computational effort of FTDP and has a more transparent impact of differences in the cycle prediction. The FTDP method, on the other hand, shows a 10% lower fuel consumption, which is close to the actual optimum, at the same cycle times, and is able to complete a much larger part of the evaluation cycles.
581			_a1
773	0		_tOil and Gas Science and Technology _g70
942			_cARTICULO
100	1		_aNilsson, Tomas _954875
100	1		_aFröberg, Anders _954876
100	1		_aAslund, Jan _954877
999			_c189203 _d189203