A Novel Closed-Loop System for Vehicle Speed Prediction Based on APSO LSSVM and BP NN

Energies

Xiaokai Guo¹  Zhi Chen¹  Xianguo Yan¹  Zhiyu Meng² 

[1] School of Mechanical Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China;Shanxi Setan Defense Technology Co., Ltd., Taiyuan 030024, China;

关键词: fuel cell hybrid vehicles;    vehicle speed prediction;    wavelet filtering;    apso-lssvm;    bp neural networks;    energy management strategy;   

DOI  :  10.3390/en15010021

来源: DOAJ

【 摘 要 】

Vehicle speed prediction plays a critical role in energy management strategy (EMS). Based on the adaptive particle swarm optimization–least squares support vector machine (APSO-LSSVM) algorithm with BP neural network (BPNN), a novel closed-loop vehicle speed prediction system is proposed. The database of a vehicle internet platform was adopted to construct a speed prediction model based on the APSO-LSSVM algorithm. Furthermore, a BPNN is established according to the local high-precision nonlinear fitting relationship between the predicted value and error so as to correct the prediction value. Then, the results are returned to the APSO-LSSVM model for calculating the minimum fitness function, thus obtaining a closed-loop prediction system. Finally, equivalent fuel consumption minimization strategy (ECMS) based EMS was performed. According to the simulation results, the RMSE performance is 0.831 km/h within 5 s, which is over 20% higher than other performances. Additionally, the training time is 15 min within 5 s, which is advantageous over BPNN. Furthermore, fuel consumption increases by 6.95% compared with the dynamic-programming algorithm and decreased by 5.6%~10.9% compared with the low accuracy of speed prediction. Overall, the proposed method is crucial for optimizing EMS as it is not only effective in improving prediction accuracy but also capable of reducing training time.

【 授权许可】

Unknown