Development of a vehicle stability control strategy for a hybrid electric vehicle equipped with axle motors
Başlık çevirisi mevcut değil.
- Tez No: 402024
- Danışmanlar: PROF. GIORGIO RIZZONI, PROF. JUNMIN WANG
- Tez Türü: Doktora
- Konular: Makine Mühendisliği, Mechanical Engineering
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 2011
- Dil: İngilizce
- Üniversite: The Ohio State University
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Belirtilmemiş.
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 184
Özet
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Özet (Çeviri)
Being one of the more important trends in the automotive industry today, Plug-in Hybrid Electric Vehicles (PHEV) are predicted by experts to be very popular in close future as they provide significant benefit in fuel economy as well as reduction in greenhouse gas emissions. PHEVs share the characteristics of both a conventional hybrid electric vehicle, having an electric motor(s) and an internal combustion engine; and of an all-electric vehicle, also having a plug to connect to the electrical grid. Having such a powertrain, the PHEV provides not only all electric drive potential with zero emissions and fuel consumption, but also eliminates the problem of range anxiety associated to all-electric vehicles, as the combustion engine works as a backup when the batteries are depleted. On the other hand, in addition to these benefits in terms of fuel economy and emissions, there is another, contingently underrated benefit associated with a PHEV, which is the subject of this dissertation: Utilizing the electric motors of the PHEV for vehicle stability control (VSC). This dissertation aims showing that including the axle electric motors, specifically for the PHEV considered in this study, within the proposed VSC scheme improves the performance of vehicle stability control. For this purpose, firstly a literature survey on VSC schemes for conventional vehicles is carried out and simulations are performed with the aim of outlining the limitations of conventional VSC schemes that are mostly based on differential braking and engine intervention. This subject is linked to the potential benefits of using electric motors within a VSC scheme. Then a simulator is developed that captures the dynamic behavior of the hybrid powertrain and the PHEV in order to evaluate vehicle dynamic response and stability. Using the mathematical model equations, the proposed VSC scheme is developed, which is based on allocating the control action, namely the corrective yaw moment and longitudinal force for tracking the desired yaw rate and speed, to individual wheel slip ratios. The desired slip ratio for each wheel is achieved by integrated wheel EHB and axle electric motor torque control. Taking the developed vehicle simulator as a platform, the proposed VSC scheme is tested with computer simulations considering extreme steering maneuvers, by analyzing vehicle and drivetrain response, and it is evaluated in comparison to conventional fuzzy VSC schemes. The comparison is done not only in terms of dynamic vehicle response, stability and performance, but also from an energy consumption standpoint which is an important feature of hybrid electric vehicles. Finally, the proposed VSC strategy is tested in real time, with a model in the loop simulation setup. Part of the simulator that includes the driver, powertrain and vehicle dynamics models are loaded to the DSpace HIL, and the controller model is loaded to the DSpace MicroAutoBox vehicle controller, with CAN protocol established in between for communication. By means the performance of the proposed VSC is verified not only with computer simulations, but also in real time, verifying its implementability.
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