A control method and system for a four-wheel independently driven electric vehicle
A four-wheel independent drive, electric vehicle technology, applied in electric vehicles, control drives, control devices, etc., can solve the problem of meeting the driver's driving expectations, the single control strategy of four-wheel independent drive electric vehicles, and the inability to effectively improve vehicle safety, etc. problems, to achieve the effect of improving stability and coordinating distribution optimization
Active Publication Date: 2021-03-19
CHANGZHOU INST OF TECH
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Problems solved by technology
[0003] In order to solve the problem that the four-wheel independent drive electric vehicle has a single control strategy, cannot meet the driving expectations of the driver under all working conditions, and cannot effectively improve the safety of the vehicle, the present invention proposes a control method based on four-wheel independent drive electric vehicles and its Method to realize
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Embodiment Construction
[0032] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0033] The invention provides a control system for four-wheel independently driven electric vehicles, see figure 1 , specifically, the control system of the four-wheel independent drive electric vehicle includes the following modules:
[0034] The fault detection module is used to obtain vehicle driving environment information, vehicle operating status information and actuator failure information;
[0035] The body posture tracking module is used to track the driver's desired driving state;
[0036] The working condition conversion control module is used to switch the vehicle driving condition and control algorithm;
[0037] The driving torque coordination distribution module is used to calculate the expected torque required by the vehicle under the actuator failure condition and optimize the torque distribution;
[0038] The motor control module is...
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The invention discloses a control method and system for a four-wheel independently driven electric vehicle. The method includes: acquiring the vehicle driving environment information, the vehicle's own running state information, and the driver's driving expectation information; tracking the body posture; switching the vehicle operating condition according to the upper module information; calculating the vehicle's expected longitudinal moment, lateral moment and Yaw moment; optimize the distribution of vehicle torque; generate the armature voltage signal required by the motor output torque to control the motor. The invention divides the driving process of the vehicle into several independent driving conditions, and is no longer limited to a single control strategy to realize the operation and control under multiple driving conditions in the global scope, and converts it into a multi-control mode As well as the coordinated switching between multiple control strategies, while meeting the driver's driving expectations, the coordinated distribution of the driving torque during the vehicle's driving process is optimized to improve the stability, operability and safety of the vehicle.
Description
technical field [0001] The invention relates to the field of electric drive vehicle control, in particular to a control method and system for a four-wheel independently driven electric vehicle. Background technique [0002] With the intensification of environmental problems and energy crisis, new energy vehicles have ushered in unprecedented development opportunities, and four-wheel independent drive electric vehicles are one of the research hotspots. The four-wheel independent drive electric vehicle has two steering motors and four drive motors. It has a simple structure and is easy to control. The number of actuators is obviously greater than its degree of freedom, and the potential for vehicle controllability is huge. The existing four-wheel independent drive electric vehicle has a single control method, which cannot effectively control the body posture and meet the driver's driving expectations when the vehicle actuator fails, which greatly reduces the maneuverability an...
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IPC IPC(8): B60W30/182B60L15/20
CPCB60W30/182B60L15/20B60W2710/083B60L2240/423Y02T10/72B60K7/0007B60W10/08B60W50/0205B60W2050/022B60W2050/021B60W50/029B60W2050/0292B60W30/02B60W2540/10B60W2540/18B60W2720/40B60W10/20B60W2555/00B60W10/119B60W30/188B60W50/0225B60W2520/26
Inventor 赵景波陈杰
Owner CHANGZHOU INST OF TECH