Look-ahead control — consequences of a non-linear fuel map on truck fuel consumption

IET Intelligent Transport Systems

2014

The paper focuses on the design of a platoon control system which takes into consideration safe travel by using the string stability theorem and the knowledge of the inclinations of the road along the route of the platoon. By choosing the speed of the platoon fitting in with the inclinations of the road the number of unnecessary accelerations and brakings can be reduced, thus so can the operations of the actuators of the vehicles, i.e. the driveline and the brake system. Although the longitudinal dynamics of the vehicles is formulated in a linear control-oriented model, the non-linear performance of the road inclinations and safety requirements based on the string stability are taken into consideration. The design of the platoon control is based on the robust H ∞ control theory.

Section: Introductionmentioning

confidence: 99%

Optimised speed profile design of a vehicle platoon considering road inclinations

IET Intelligent Transport Systems

2014

“…Several methods in which the road conditions are taken into consideration have already been proposed, see [7,13,14]. The look-ahead control methods assume that information about the future disturbances to the controlled system is available.…”

Section: Introductionmentioning

confidence: 99%

Design of vehicle cruise control using road inclinations

2013

IJVAS

The paper proposes the design of velocity based on road inclinations, speed limits, a preceding vehicle on the lane and traveling time. A new control method in which the longitudinal control incorporates the brake and traction forces is also proposed to achieve the required velocity. By choosing the velocity which is appropriate according to the road and traffic information, the number of unnecessary accelerations and brakings and their durations can be significantly reduced. In the design method the modeling and robust control of the LPV theory are exploited. The operation of the longitudinal controlled system and the influences of different designed parameters are analyzed through vehicle simulations. Finally, the efficiency of the controlled system is demonstrated on a real transportation route.

“…These attributes of the look-ahead system also benefits the maintenance cost of the vehicle. Several look-ahead methods have already been proposed, see [3,4,10,11].…”

Section: Introductionmentioning

confidence: 99%

“…These attributes of the look-ahead system also benefits the maintenance cost of the vehicle. Several look-ahead methods have already been proposed, see [3,4,10,11].The speed proposed by the look-ahead control system can differ from the speed which is natural for a human driver. The driver's speed selection depends on limited and inaccurate visual information about the oncoming road.…”

mentioning

confidence: 99%

Enhancement of Driver Speed Based on Multi-Criteria Optimization

Mihály

2013

Per. Pol. Transp. Eng.

The paper focuses on the design of an adaptive cruise control system which follows the behavior of the driver besides the optimization of longitudinal energy and fuel consumption. IntroductionConventional cruise control systems which are able to maintain steady speed have been used in the automotive industry for several decades. These systems can maintain steady speed by adjusting the propulsion force acting on the vehicle, i.e modifying the throttle status according to the disturbance acting on the vehicle. Among today's middle and premium category vehicles adaptive cruise control systems which are able to follow the preceding vehicle in a driver defined safe distance are becoming increasingly widespread. These systems use radar sensors to observe the traffic, and the intervention of the brake system is also required.In the paper a look-ahead control method for the design of the vehicle's speed is applied, in which the road inclinations and speed limits are taken into consideration, see [9]. In this method information about the current and oncoming road sections such as speed limits and road slopes are required. With the consideration of road information the selected speed can be in coherence with the oncoming road, thus speed can be reduced in advance of a slope or a speed limit. By selecting an optimal speed for the vehicle unnecessary accelerations and brakings can be reduced. This results in moderated energy and fuel consumption and in addition, the wearing of the brake system is also reduced. These attributes of the look-ahead system also benefits the maintenance cost of the vehicle. Several look-ahead methods have already been proposed, see [3,4,10,11].The speed proposed by the look-ahead control system can differ from the speed which is natural for a human driver. The driver's speed selection depends on limited and inaccurate visual information about the oncoming road. The driver's behavior in term of velocity selection is depending on instantaneous effects, such as disturbances acting on the vehicle, the traffic situations etc.The paper focuses on a multi-criteria look-ahead control design considering objectives such as the minimization of energy and consumption as well as the incorporation of the driver behavior. The results of the design are validated in a CarSim simulation environment. This paper is organized as follows. In Section 2 a speed