<p>To optimize the control strategy of the active sound generation (ASG) system of electric vehicles and improve the authenticity of the simulation sound, this paper simulates the sound based on the harmonic algorithm and proposes a control method of the vehicle simulation sound. In order to optimize the control strategy of the active voice generation (ASG) system of electric vehicles and improve the authenticity of the simulated sound, the internal combustion engine car sound is simulated based on the harmonic algorithm,and come up with a method to do things that for the simulated sound carried on the electric vehicle.In this paper, based on the harmonic algorithm, starting from the virtual speed input by ASG system, according to the data collected from the actual internal combustion engine car, the shift strategy calculation is designed.Determine the actual speed of internal combustion engine car and the shift point of throttle opening, and through the python simulation curve.This paper focuses on the optimization and Simulation of the transmission ratio by using the offset proportional series algorithm. In order to improve the sound quality, the optimal corresponding relationship between the speed of internal combustion engine car and electric vehicle is obtained , which makes the sound of internal combustion engine car more realistic.However, there is no shift or speed mutation process in the electric vehicle, so this paper optimizes the virtual speed by inserting quadratic function fitting, and realizes the "virtual speed" transformation of ASG system based on the real-time speed of electric vehicle. Finally, the improved ASG system model is called advanced ASG system, and is simulated on the actual electric vehicle. The whole optimization system takes the "virtual speed" of the real-time speed of the actual electric vehicle as the input, takes the stm32F7 series single chip as the hardware carrier, and uses the harmonic algorithm to synthesize the dynamic acceleration sound. Finally, In the electric car ,organizing engineers and students with sound quality experience to evaluate the quality of simulation sound of internal combustion engine car.To evaluate. The results show that the control strategy proposed in this paper can realize the sound simulation of internal combustion engine car in the electric vehicle cab, and the subjective evaluation results show that more than 80% people think that the upgraded ASG system can better meet the majority of drivers' preference for sound than the original version of ASG system, and can achieve the purpose of improving the driving pleasure.</p>

Research on Control Strategy of Automobile Simulate Sound Based on Harmonic Algorithm

Paper Proceedings: https://asmedigitalcollection.asme.org/IMECE/IMECE2021/volume/85543

ASME 2021 International Mechanical Engineering Congress and Exposition (IMECE2021)

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