Multi-working-condition active vibration reduction control method for hybrid power system based on vibration reduction waveforms

Abstract

The invention discloses a multi-working-condition active vibration reduction control method for a hybrid power system based on vibration reduction waveforms, and relates to the field of new energy hybrid power system electronic control. According to the method, fluctuation torques on an electromechanical coupling shaft of the hybrid power system in different operation states are tested in a test bench, and vibration reduction compensation waveforms corresponding to different working conditions are designed in an off-line mode; a crankshaft position sensor and a rotary transformer are used for collecting signals of positions, rotating speeds and the like of an engine crankshaft and a motor rotor in real time, and the state and working condition points of a hybrid power system are judged online in real time in combination with an engine throttle target instruction; and the amplitude and phase of the fluctuation torque are estimated, a prefabricated vibration reduction compensation waveform is matched, the motor is enabled to superpose the torque of the vibration reduction waveform on the target torque to realize active vibration reduction, and the vibration reduction waveform is switched in real time along with the change of working conditions. The torque ripple suppression of the hybrid power system under multiple working conditions can be realized according to the operation state, and the driving comfort and the safety and reliability of parts are improved.

Description

technical field [0001] The invention belongs to the field of electronic control of new energy hybrid power systems, and in particular proposes a multi-working-condition active vibration reduction control method for hybrid power systems based on vibration reduction waveforms. Background technique [0002] The hybrid system achieves energy saving and emission reduction by using the engine, electric motor and battery to work together with high efficiency. The range-extended hybrid system is a series hybrid system, which uses a generator set composed of an engine and a motor to extend the mileage of an electric vehicle, and is an effective form of transition from a hybrid vehicle to an electric vehicle. In order to reduce the working time of the engine, the hybrid system will use the ISG motor connected to it to achieve rapid start and stop, and the torsional vibration generated by the frequent and rapid start and stop of the engine will interfere with driving comfort, and may a...

AI Technical Summary

Problems solved by technology

However, the active vibration reduction technology of the existing hybrid power system is mainly oriented to the start-stop condition of the engine, and no clear vibration reduction method has been given for the vibration reduction under various other operating conditions.

However, other working conditions do have the actual situation that excessive vibration and noise affect comfort. Typical working conditions include: the range-extended hybrid system is designed to allow the engine-generator set to work in the high-speed, high-load high-efficiency zone once it is turned on. If the driver is running at a low speed in urban conditions, the driver will feel the background noise and vibration experience of the engine-generator set running at high speed, which reduces the driving comfort. At the same time, the torsional vibration on the electromechanical coupling shaft will also cause It brings about the safety and reliability of the shaft system, and the existing technology is difficult to meet the active vibration reduction control under multiple working conditions

[0005] In addition, the active vibration reduction technology of the existing hybrid system adopts the real-time measurement of the electromechanical coupling shaft torque based on the torque sensor or the real-time estimation of the electromechanical coupling shaft torque based on the engine cylinder pressure sensor, and then applies the reverse active vibration reduction rotation. method of moments adds high cost to the system

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