Energy-saving stability motion control method for networked car queue

Abstract

The invention discloses an energy-saving stability motion control method for a networked car queue, and belongs to the technical field of a car driving assistance system. The method includes the stepsof first establishing a single vehicle dynamics model in the networked car queue and calculating the acceleration of each vehicle in a pulse phase and a glide phase; by establishing a car following subsystem model with the relative speed and the relative inter-vehicle distance error of a car following subsystem composed of two adjacent vehicles as state variables, determining four driving modes of the car following subsystem to obtain a host vehicle state trajectory on a [delta]v-[delta]R plane; for the pulse or glide cases of a front vehicle, obtaining host vehicle [delta]v-[delta]R state plane partition maps respectively, and determining the host vehicle acceleration of each range; and finally, synthesizing the host vehicle state plane partition maps obtained respectively for the pulseand glide cases of the front vehicle, and obtaining a switching control chart and a control law of the host vehicle to achieve energy-saving motion control of the vehicles in the networked car queue.The method in the invention has low requirements on the precision of the position control of the vehicles and has the effect of high fuel efficiency.

Description

technical field [0001] The invention belongs to the technical field of automobile driving assistance systems, and in particular relates to an energy-saving stability motion control method of a network-connected automobile queue utilizing periodic switching control. Background technique [0002] At present, my country's energy shortage and serious air pollution, energy-saving and environmental protection technology has become the focus of research in the automotive industry, and has also been highly valued by the country and the government. The "Energy Conservation and New Energy Automobile Industry Development Plan" promulgated by the State Council pointed out that the average fuel consumption per 100 kilometers of passenger cars must be reduced from 7.71L in 2010 to 5L by 2020. As a result, a lot of research has been done on improving fuel efficiency. [0003] Existing studies have shown that, for a single vehicle, the periodic driving strategy, that is, the acceleration-g...

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Problems solved by technology

However, the actual promotion of this scheme is very difficult because of the following reasons: (1) The requirements for the control accuracy of the vehicle are very strict for following the vehicle at close range, which will greatly increase the development cost and technical difficulty of the vehicle sensors, controllers and actuators ; (2) If there is a deviation in vehicle control, following vehicles at a short distance in the queue will easily lead to serious serial rear-end collision accidents; (3) The energy-saving principle of the "flying geese effect" is mostly applicable to heavy-duty trucks with a large windward area, and the energy-saving effect on cars is not good. significantly

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