Design of brake force distribution model for front-and-rear-motor-drive electric vehicle based on radial basis function
Journal Title: Archives of Transport - Year 2018, Vol 4, Issue 48
Abstract
To achieve high-efficiency and stable brake of a front-and-rear-motor-drive electric vehicle (FRMDEV) with parallel cooperative braking system, a multi-objective optimal model for brake force distribution is created based on radial basis function (RBF). First of all, the key factors, which are the coefficient of brake force distribution between the front and rear shafts, the coefficient of brake force distribution at wheels, the coefficient of regenerative brake force distribution between front and rear axles, that influence the brake stability and energy recovery of the FRMDEV are analyzed, the fitness functions of brake stability and energy recovery are established. Secondly, the maximum allowed regenerative brake torque influenced by the state of charge of battery is confirmed, the correction model of the optimal distribution coefficient of regenerative brake force is created according to motor temperatures. Thirdly, based on HALTON sequence method, a two-factor database, vehicle velocity and brake strength, that characterizes vehicle operation is designed. Then an off-line response database of the optimal brake force distribution is established with the use of particle swarm optimization (PSO). Furthermore, based on hybrid RBF, the function model of the factor database and the response database is established, and the accuracy of the model is analyzed. Specially, the correlation coefficient is 0.995 and the predictive error variance is within the range between 0.000155 and 0.00018. The both indicate that the multi-objective distribution model has high accuracy. Finally, a hardware-in-loop test platform is designed to verify the multi-objective optimal brake force distribution model. Test results show that the real-time performance of the model can meet the demand of engineering application. Meanwhile, it can achieve both the brake stability and energy recovery. In comparison with the original brake force distribution model based on the rule algorithm, the optimized one proposed in this paper is able to improve the energy, recovered into battery, by 14.75%.<br/><br/>
Authors and Affiliations
Binbin SUN, Tiezhu ZHANG, Song GAO, Wenqing GE, Bo LI
Keywords
Related Articles
- EP ID EP431371
- DOI 10.5604/01.3001.0012.8368
- Views 120
- Downloads 0
Model of multimodal transport node functioning
To increase the efficiency of transport nodes functioning taking into account the logistics management principles it is necessary to optimize the structure and capacity of transport nodes' production resources, and to de...
Geometric factors influencing entry capacity of roundabouts under heterogeneous traffic conditions
Roundabout entry capacity is influenced by geometric features of the roundabout, traffic flow characteristics, vehicle and driver characteristics, as well as, environmental conditions. The major methods for estimating ro...
Design of large-scale streamlined head cars of high-speed trains and aerodynamic drag calculation
Aerodynamic drag plays an important role in high-speed trains, and how to reduce the aerodynamic drag is one of the most important research subjects related to modern railway systems. This paper investigates a design met...
Analysis of high frequency vibration of tram monobloc wheel
European Environmental Agency estimates that about 120 million people in the EU (over 30% of the total population) are exposed to traffic noise above 55 Ldn dB. It is estimated that 10% of the EU population is exposed to...
Studies and assessment of transport noise in Poznan
In many cities in Poland, because of the lack of ring roads, the main traffic routes of state roads go through the cities affecting local and regional traffic. This causes high traffic and also many undesired effects for...