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An optimization method for the chassis system of an electric wheel vehicle

A technology of an electric wheel vehicle and an optimization method, which is applied in the fields of automobile steering system, braking system and suspension system, can solve the problems of mutual influence and the inability to obtain the overall comprehensive performance of the integrated system.

Active Publication Date: 2018-02-06
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since there is a certain coupling relationship between the three subsystems, and the subsystems influence and restrict each other, simple serial superposition optimization cannot obtain the optimal overall comprehensive performance of the integrated system.

Method used

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  • An optimization method for the chassis system of an electric wheel vehicle
  • An optimization method for the chassis system of an electric wheel vehicle
  • An optimization method for the chassis system of an electric wheel vehicle

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Embodiment Construction

[0071] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0072] The invention discloses an electric wheel vehicle chassis system, which comprises a differential steering module, a differential braking module and an active suspension module.

[0073] Such as figure 1 As shown, the differential steering module includes a steering wheel torque angle sensor, a rack and pinion steering gear, two hub motors, a vehicle speed sensor, two wheel speed sensors, a yaw rate sensor and a differential steering control ECU; the steering wheel assembly of a car The steering column is connected to the rack and pinion steering gear, and the rack and pinion steering gear is connected to the axle of the front wheel of the car through the steering tie rod; the steering wheel torque angle sensor is set on the steering column to obtain the torque and angle of the steering wheel of the car; The two hub motors are used to drive ...

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Abstract

The invention discloses a chassis system of an electric wheel automobile and an optimization method of the chassis system. The chassis system comprises a differential steering module, a differential brake module and an active suspension module. The differential steering module comprises a steering wheel torque angle sensor, a gear-rack steering gear, two hub motors, a vehicle speed sensor, two wheel speed sensors, a yaw velocity sensor and a differential steering control ECU. The active suspension module comprises an elastic element, a damping element, a force generator and a guiding mechanism. The differential brake module comprises a brake pedal position sensor and a differential brake control ECU. Under a steering / braking working condition, the chassis system is optimized based on an NSGA-II algorithm with the steering road sense, the steering sensitivity and the suspension smoothness as performance indexes and parameters of the three modules of the chassis system as optimization variables, so that the automobile smoothness is guaranteed while the good steering road sense and steering sensitivity are obtained by the system, and accordingly the overall comprehensive performance of the chassis system of the electric wheel automobile is improved.

Description

technical field [0001] The invention relates to the field of automobile steering system, suspension system and braking system, in particular to an electric wheel automobile chassis system and an optimization method thereof. Background technique [0002] The structure of the electric wheel technology itself has very good advantages, making it widely used in electric vehicles. Since the electric wheel technology cancels the transmission, differential and other mechanisms, the transmission system is simplified, which not only improves the transmission efficiency, but also reduces the space in the vehicle occupied by the transmission system; the motor and the reduction mechanism are directly integrated with the wheel. Conducive to vehicle layout. [0003] The electric wheel vehicle adopts a different steering and braking structure than the traditional one, and applies differential power steering and differential braking technology. By changing the output torque of the left and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L15/20
CPCB60L15/2009B60L15/2036B60L2220/42B60L2220/44B60L2240/12B60L2240/461B60L2250/26Y02T10/64Y02T10/72
Inventor 赵万忠杨遵四王春燕
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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