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Longitudinal Velocity Estimation of Electric Vehicle with 4 In-wheel Motors
Technical Paper
2008-01-0605
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper describes a methodology to estimate longitudinal velocity of a 4-wheel-drive electric vehicle, in which wheel driven torque can be independently controlled by electric motor. Without non-driven wheels it would be difficult to estimate the vehicle longitudinal velocity precisely, especially when all of four wheels have large slip ratio. Therefore, an estimation methodology based on fuzzy logic is put forward, which uses four wheel speed and longitudinal acceleration as input signals. However, this method works not very well when two or more wheels have large slip ratio. In order to improve estimation effect, a state variable filter is designed to calculate wheel acceleration signals, which are used as additional signals to the fuzzy logic observer. Furthermore, the possibility of using four wheel driving torque signals to improve the estimation precision is also discussed.
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Citation
Gao, X., Yu, Z., and Xu, T., "Longitudinal Velocity Estimation of Electric Vehicle with 4 In-wheel Motors," SAE Technical Paper 2008-01-0605, 2008, https://doi.org/10.4271/2008-01-0605.Also In
Vehicle Dynamics and Simulation and Tire and Wheel Technology, 2008
Number: SP-2157; Published: 2008-04-14
Number: SP-2157; Published: 2008-04-14
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