A Fault Diagnosis Method for Output Shaft Speed Sensor of Automatic Transmission
A speed sensor and automatic transmission technology, applied in the direction of speed/acceleration/shock measurement, speed/acceleration/shock measurement equipment testing/calibration, instruments, etc., can solve problems such as unguaranteed, speed sensor acquisition signal fluctuations, failures, etc. Achieve good real-time performance and accuracy, the method is simple and reliable, and achieve the effect of fault-tolerant control
Active Publication Date: 2021-12-14
BEIHANG UNIV
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Problems solved by technology
The common fault of the speed sensor is that the change of the installation air gap between the speed measuring gear teeth of the output shaft of the automatic transmission and the speed sensor causes the signal collected by the speed sensor to fluctuate greatly, and the rotational speed of the output shaft cannot be accurately obtained, and even more serious faults are caused. Therefore, it is of great significance to the fault diagnosis of automatic transmission speed sensor and the research of fault-tolerant control after a fault occurs.
[0004] At present, most of the research on speed sensor faults relies on complex algorithms or models, which cannot guarantee high real-time performance or accuracy.
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[0039] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0040] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.
[0041] According to the vehicle transmission system model, the output shaft speed and the vehicle speed should theoretically have the following linear relationship:
[0042]
[0043] Among them, n ...
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The invention discloses a fault diagnosis method for an output shaft speed sensor of an automatic transmission. , based on the reference relational expression to filter out the effective signal that meets the requirements, and based on the effective signal interpolation to obtain the relational expression between the output shaft speed signal and the vehicle speed sensor signal after correction; filter the current real-time collected output shaft speed sensor signal, and filter the output shaft before and after filtering After the speed signal is made a difference, take the absolute value to obtain the residual; if the residual is not less than the fault dynamic threshold, the output shaft speed sensor is faulty. According to the collected current vehicle speed sensor signal and the relationship between the output shaft speed signal and the vehicle speed sensor signal Calculate the real output shaft speed signal and output it. The method of the invention is simple and reliable, and has better real-time performance and accuracy.
Description
technical field [0001] The invention belongs to the technical field of fault diagnosis of an automatic transmission sensor, in particular to a fault diagnosis method for an output shaft speed sensor of an automatic transmission. Background technique [0002] The automatic transmission can automatically realize the shift control, which greatly improves the power, economy and driving comfort of the car. Among them, the hydraulic automatic transmission and the dual-clutch automatic transmission adopt a dual-clutch or multi-clutch design. When one clutch is opened, the other clutch is engaged at the same time, and the gear shift is realized without power interruption, ensuring the comfort of the driver and passengers. . [0003] In order to realize the precise control of the gear shifting process, it is necessary to obtain the rotational speed of the input and output shafts in real time through the speed sensor. The speed sensor of the input and output shaft of the automatic t...
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IPC IPC(8): F16H61/12G01P21/00
CPCF16H61/12G01P21/00F16H2061/1208F16H2061/1284F16H2061/1232
Inventor 王书翰郑威徐向阳郭伟董鹏刘艳芳支景锋陈一铉王涛
Owner BEIHANG UNIV