LQG Control Strategy for Enhancing Ride and Safety Performance of Electric Vehicle Driven by In-Wheel Motors
LiQiang Jin, Yue Liu, JianHua Li*
Identifiers and Pagination:Year: 2015
First Page: 293
Last Page: 301
Publisher Id: TOMEJ-9-293
Article History:Received Date: 8/1/2015
Revision Received Date: 15/1/2015
Acceptance Date: 16/1/2015
Electronic publication date: 29/5/2015
Collection year: 2015
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: (https://creativecommons.org/licenses/by/4.0/legalcode). This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
In this paper, a method for reducing unspring mass as well as improving safety and ride properties of vehicles driven by in-wheel motors will be provided. To begin with, the advantages of vehicles armed with in-wheel motors will be described, after which some drawbacks of this idea will be studied. Then, to getting a better analysis, quarter car model will be studied in frequency domain. Gain of body acceleration and wheel dynamic load, which can be equal to ride property and safety performance respectively, will be compared. Finally, an idea that makes the drive motor suspend will be proposed for enhancing the two properties and then a LQG controller will be provided for further optimization. Through the comparison in time domain and frequency domain, one can come to a conclusion that vehicles driven by suspended motors not only simplified the structures but also can be used as an absorber for vibration reduction.