Optimization methodology for control strategy of parallel hybrid electric vehicle based on chaos prediction

Hu, Donghai; Hu, Leli; Yan, Yanzhi

doi:10.1063/1.5055644

Cited by 9 publications

(6 citation statements)

References 17 publications

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“…Electromechanical coupling rotor nonlinear model in the hybrid driving mode. According to the torsional vibration model of the gear pair given by equation (10), the electromechanical coupled torsional vibration model at the hybrid driving mode is established, 20 and it is expressed as…”

Section: Torsional Vibration Modelmentioning

confidence: 99%

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Torque distribution method based on vibration instability of PS-HEV transmission system

Cai

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part D:

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The power-split hybrid electric vehicle has multiple working modes, which can be switched to different working mode according to different working conditions. The main switching process involved in the vehicle driving is the switch from the pure electric mode to the hybrid driving mode. This paper studies the mode switching process involved in the power-split hybrid electric vehicle driving process, and a nonlinear dynamic equation of the electromechanical coupling of the corresponding transmission system is established. Then the multi-scale method is employed to solve the dynamic equation, and the amplitude-frequency response curve is drawn. According to the curve, the effects of load, mechanical input excitation of the engine and motor electromagnetic excitation on the electromechanical coupling torsional vibration of the transmission system are studied. The engine and motor torque distribution schemes are obtained by analyzing the amplitude-frequency response curve of the torsional vibration characteristics of the system. The analysis results show that the vibration instability phenomenon of the transmission system can be avoided by establishing the nonlinear dynamic equation of the transmission system, analyzing the vibration characteristics of the vibration system, and optimizing the torque distribution of a PS-HEV at different working modes.

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Section: Torsional Vibration Modelmentioning

confidence: 99%

“…Substituting equation (20) into equation (19), a set of linear partial differential equations is obtained by comparing e with the same power, which is given by…”

Section: Torsional Vibration Modelmentioning

confidence: 99%

Torque distribution method based on vibration instability of PS-HEV transmission system

Cai

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…Nonlinear model of electromechanical coupling rotor in hybrid driving mode. According to the torsional vibration model of the gear pair given by equations ( 10)-( 12) the electromechanical coupled torsional vibration model at the hybrid driving mode is established, 3 and it is expressed as:…”

Section: Torsional Vibration Modelmentioning

confidence: 99%

“…The analysis results were used to optimize the hybrid control strategy in order to improve the torsional stability of the hybrid vehicle power system under three typical driving modes. 3 The research on the torsional vibration of a hybrid vehicle power system mainly focused on the influence of the engine excitation, natural frequency analysis, and the corresponding modal analysis. Further, Hu et al proposed a non-linear dynamic model of a hybrid power transmission system was established considering the multi-frequency excitation, and then the model was transformed into a fast-slow model with two-time scales.…”

Section: Introductionmentioning

confidence: 99%

Research on operating domain optimization of power split hybrid electric vehicle based on global bifurcation and chaos threshold

Cai

Chen

et al. 2020

Advances in Mechanical Engineering

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The power-split hybrid electric vehicle (PS-HEV) has multiple working modes to maintain high operation efficiency according to different conditions. The main modes involved in the vehicle driving process are pure electric mode and the hybrid driving mode. Because the electromechanical coupling problem is involved in the above two working modes, the transmission system exhibits strong non-linear characteristics. If the operation range of the engine and motor are unreasonable, the rotor system will vibrate and become instability. In this paper, the non-linear dynamic equations of the electromechanical coupling of the transmission system are established for electric driving mode and hybrid driving mode. The closed-homoclinic phase trajectory equation at the center point of the disturbance-free Hamilton system is determined. The chaotic thresholds for the pure electric and hybrid driving modes are derived through the Melnikov’s method to obtain the optimal working domain of the engine and motor. Finally, numerical simulation analysis is conducted to verify the feasibility of the work domain optimization scheme. Simulation results show that the proposed engine and motor working area optimization scheme can effectively avoid the homoclinic bifurcation in the PS-HEV during the driving process and prevent the vehicle from entering the chaotic state.

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“…Hence, the overall efficiency can be higher and the total cost of the vehicle lower [2]. However, the mechanical efficiency in some conditions could be lower due to the electric motor is always connected when the ICE works [12]. The high amount of options and parameters evidences that advanced investigation needs to be performed.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the parallel and mild hybrid vehicle platforms operating under conventional and advanced combustion modes

Benajes

García

Monsalve‐Serrano

et al. 2019

Energy Conversion and Management

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The stringent regulations, increased global temperature and customer demand for high fuel economy have led to rapid developments of different alternative propulsion solutions in the last decade, with special attention to the electrified vehicles. The combination of electric machines with conventional powertrains allows to diversify the powertrain architectures. In addition, alternative combustion modes as reactivity controlled compression ignition (RCCI) have been shown to provide simultaneous ultralow NOx and soot emissions with similar or better thermal efficiency than conventional diesel combustion (CDC). Therefore, the combination of both technologies creates a promising horizon to be implemented in commercial vehicles of the near future. In this work, experimental and numerical simulations were combined to study the potential of the parallel full hybrid electric vehicle (P2-FHEV) and mild hybrid vehicle (MHEV) to obtain lower fuel consumption and NOx emissions than a conventional powertrain in the Worldwide Harmonized Light Vehicles Cycle (WLTC). The hybrid vehicles are simulated with both CDC and diesel-gasoline RCCI combustion engines as power source. Each powertrain was optimized in terms of components (battery, electric motors...) capacity, internal combustion engine operative points, energy management strategy and gear ratios. The results show a significant fuel consumption reduction as the complexity of the hybrid system increases. The parallel architecture, which represents the most complex hybrid system tested in this work, allows obtaining a fuel consumption reduction of around 20% as compared to CDC. The dual-mode CDC-RCCI concept showed improvements in NOx and soot emissions with comparable values in terms of energy consumption and CO2 emissions than CDC. Additionally, the mild hybrid technology with the functionality of start-stop, torque assist and regenerative braking showed an acceptable balance between complexity and fuel consumption gain.

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Optimization methodology for control strategy of parallel hybrid electric vehicle based on chaos prediction

Cited by 9 publications

References 17 publications

Torque distribution method based on vibration instability of PS-HEV transmission system

Torque distribution method based on vibration instability of PS-HEV transmission system

Research on operating domain optimization of power split hybrid electric vehicle based on global bifurcation and chaos threshold

Optimization of the parallel and mild hybrid vehicle platforms operating under conventional and advanced combustion modes

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