A Method for Identification of Driving Patterns in Hybrid Electric Vehicles Based on a LVQ Neural Network

• Main Authors: Xiaowei Zhang, Chao Sun, Hongwen He
• Format: Article
• Language: English
• Published: MDPI AG 2012-09-01
• Series: Energies
• Subjects: hybrid electric vehicles; LVQ; neural network; driving pattern recognition; simulation; fuel economy
• Online Access: http://www.mdpi.com/1996-1073/5/9/3363

Driving patterns exert an important influence on the fuel economy of vehicles, especially hybrid electric vehicles. This paper aims to build a method to identify driving patterns with enough accuracy and less sampling time compared than other driving pattern recognition algorithms. Firstly a driving pattern identifier based on a Learning Vector Quantization neural network is established to analyze six selected representative standard driving cycles. Micro-trip extraction and Principal Component Analysis methods are applied to ensure the magnitude and diversity of the training samples. Then via Matlab/Simulink, sample training simulation is conducted to determine the minimum neuron number of the Learning Vector Quantization neural network and, as a result, to help simplify the identifier model structure and reduce the data convergence time. Simulation results have proved the feasibility of this method, which decreases the sampling window length from about 250–300 s to 120 s with an acceptable accuracy. The driving pattern identifier is further used in an optimized co-simulation together with a parallel hybrid vehicle model and improves the fuel economy by about 8%.