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Torque distribution method for improving power cycle of distributed electric drive chassis

A torque distribution method and power cycle technology are applied in the field of torque distribution to improve the power cycle of the distributed electric drive chassis, and can solve the problems of not considering the economy of the whole vehicle.

Active Publication Date: 2021-04-16
尚元智行(宁波)科技有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

But it also only considered the driving stability, and did not consider the economy of the whole vehicle.

Method used

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  • Torque distribution method for improving power cycle of distributed electric drive chassis
  • Torque distribution method for improving power cycle of distributed electric drive chassis
  • Torque distribution method for improving power cycle of distributed electric drive chassis

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specific Embodiment

[0046] A method of torque distribution to improve the power cycle of a distributed electric drive chassis, such as figure 1 shown, including the following steps:

[0047] (1) Acquisition of signals from sensors

[0048] Through the CAN communication network of the vehicle, the signals of the required sensors are collected, including: obtaining the longitudinal acceleration a of the vehicle body through the inertial measurement unit IMU x , Lateral acceleration a y , Yaw rate ω z and heading angle β z , obtain the torque T of each wheel of the car through the motor controller i and speed ω i , obtain the front axle steering system rotation angle δ through the steering motor f and rear axle steering angle δ r , and obtain the longitudinal coordinate information x of the GNSS navigation system e and horizontal coordinate information y e (The coordinates are calculated by latitude and longitude and the reference origin);

[0049] (2) Calculate the desired state of the ve...

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Abstract

The invention discloses a torque distribution method for improving power cycle of a distributed electric drive chassis. The torque distribution method is characterized by comprising the following steps: calculating a set vector of a vehicle expected state according to a sensor signal and a seven-degree-of-freedom vehicle model of a four-wheel drive vehicle; estimating a set vector of the actual state of the vehicle according to the sensor signal and the two-degree-of-freedom vehicle model; obtaining an error state by subtracting the expected state vector from the estimated state vector; calculating a set vector of parasitic power of each wheel in vehicle driving; constructing a positive definite cost function, establishing an optimization model taking minimization of the cost function as a target, and solving the model through a search method or a genetic algorithm to obtain a torque distribution strategy capable of ensuring the operation stability and reducing the power cycle of the vehicle under the working condition. The method has the advantages that the energy utilization efficiency of the tire output end is improved, the energy utilization efficiency of the platform in the using process is improved, and meanwhile steering stability is considered.

Description

technical field [0001] The invention relates to an automobile electronic control technology, in particular to a torque distribution method for improving the power cycle of a distributed electric drive chassis. Background technique [0002] Discussions on power cycle issues often focus on heavy-duty transport vehicles, because most heavy-duty transport vehicles are driven by multiple axles, and the unbalanced drive between axles or wheels seriously affects tire wear and fuel consumption. With the development of electric vehicles and electric drive technology, it is gradually becoming possible to use electric drive transport platforms for heavy cargo transportation. At present, my country's energy is still in a state of tension, and the optimal distribution of driving torque is carried out from the perspective of reducing power cycle, that is, designing an electronic differential with the joint goal of reducing power cycle can improve the efficiency of electric drive logistics...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W30/02B60W40/00B60W40/10B60W40/105B60W50/00
Inventor 马芳武申棋仁代凯冯曙吴官朴张豪斌
Owner 尚元智行(宁波)科技有限公司
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