Method for diagnosing and locating fault of vehicle direct drive motor sensor and replacing fault information

A sensor failure, direct-drive motor technology, applied in the field of automotive research, can solve problems such as reduced system robustness, control performance transition, and sensor performance failures.

Inactive Publication Date: 2018-06-05
JIANGSU UNIV
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Problems solved by technology

However, due to the influence of environmental factors and the aging of components, sensors such as current and speed are prone to performance failures
Once a sensor f

Method used

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  • Method for diagnosing and locating fault of vehicle direct drive motor sensor and replacing fault information
  • Method for diagnosing and locating fault of vehicle direct drive motor sensor and replacing fault information
  • Method for diagnosing and locating fault of vehicle direct drive motor sensor and replacing fault information

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Embodiment Construction

[0091] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

[0092] Such as figure 1 As shown, a vehicle direct drive motor sensor fault diagnosis, location and fault information replacement method according to the present invention includes the following steps:

[0093] Step S1: Mathematical modeling of the electric drive wheel system.

[0094] The rotational dynamics equation of the wheel can be expressed as:

[0095]

[0096] Among them, J 1 is the moment of inertia of the wheel; n is the speed of the wheel; r is the effective radius of the wheel; F d is the longitudinal force of the drive wheel; T L is the load moment of the hub motor installed in the wheel.

[0097] The torque balance equation on the hub motor output shaft is:

[0098]

[0099] The dynamic voltage balance equation of the hub motor equival...

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Abstract

The invention discloses a method for diagnosing and locating a fault of a vehicle direct drive motor sensor and replacing fault information, the method comprises the steps of step one, electric driving wheel system mathematical modeling; step two, optimal unknown input observer design based on the electric driving wheel system mathematical model; step three, sensor fault diagnosis and locating andfault sensor information replacing; step four, sensor fault diagnosis experimental verification and analysis. According to the method, the system characteristics of the vehicle direct drive motor sensor are combined, unknown input and noise are considered for system mathematical modeling, the optimal unknown input observer is designed for system state estimation to obtain the fault residual errorinformation, accordingly, the strategy for diagnosing and locating the fault of the vehicle direct drive motor sensor and replacing the fault information is put forward, and the feasibility of the method is verified.

Description

technical field [0001] The invention belongs to the field of automobile research, and in particular relates to a method for fault diagnosis, positioning and fault information replacement of a direct drive motor sensor for a vehicle. Background technique [0002] At present, the problems of environmental pollution and energy crisis are becoming more and more severe, electric vehicles have very good development prospects, and have become one of the research hotspots in the automotive industry. Distributed drive electric vehicles directly driven by four in-wheel motors have attracted the attention of many researchers in the field of electric vehicles. Since the instantaneous control of the output torque of the four driving wheels is easy to realize, it has advantages over traditional vehicles in terms of high-response parameter identification, yaw stability control of the vehicle, and optimal efficiency control of electric vehicles. The current and rotational speed of the in-w...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 陈特陈龙徐兴蔡英凤江昕炜江浩斌
Owner JIANGSU UNIV
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