A Redundancy Control Method for AMT Gearing Process Based on Decision Tree Algorithm
A technology of redundant control and decision tree, applied in the direction of transmission control, calculation, computer parts, etc., can solve problems such as the failure of the gear shift sensor, and achieve the effect of improving the performance of the vehicle
Active Publication Date: 2022-05-20
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology
[0005] The purpose of the present invention is to solve the failure problem of the gear displacement sensor and provide a redundant control method for the AMT gear process based on the decision tree algorithm
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Embodiment 1
[0029] A redundant control method of AMT mounting process based on decision tree algorithm, which is characterized by: including the following steps:
[0030] Step 1: Collect real vehicle test data;
[0031]Step 2, through the characteristic variables and prediction values to establish the hanging time decision tree model; the characteristic variables include: the average value of the air pressure p in the mounting stage, the average value of the transmission input shaft speed value n1, the average value of the transmission output shaft speed value n2 and the synchronization speed difference of the synchronizer as the characteristic variable of the decision tree; the predicted value includes: the total time of the mounting stage; the statistics obtain the characteristic variables and predicted values when switching every two gears, and the data set is generated; the data set is divided into training set and test set The training set is used to establish a "fully growing" CART regr...
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The invention relates to a redundant control method for an AMT shifting process based on a decision tree algorithm, and belongs to the technical field of AMT system fault diagnosis. The present invention selects the average value of the air pressure p in the stage of engaging gear, the average value of the speed value n1 of the transmission input shaft, the average value n2 of the speed value n2 of the output shaft of the transmission, and the synchronous speed difference of the synchronizer as the characteristic value variable, and selects the time for shifting into gear as the prediction value. Through cross-validation, the original decision tree is pruned to obtain the optimal decision tree model. When using the test set for model verification, the accuracy of the prediction of the time in gear is more than 90% when the prediction error does not exceed 50ms. The actual vehicle test shows that the solenoid valve control strategy based on this algorithm can complete the normal shift operation when the gear shift sensor fails. The comparison between the actual transmission ratio and the theoretical transmission ratio predicted by the control strategy reveals that the predicted The judgment error of the shift point time is within 50ms.
Description
Technical field [0001] The present invention relates to a redundant control method for AMT mounting process based on decision tree algorithm, which belongs to the field of AMT system fault diagnosis technology. Background [0002] As an important part of the chassis system, the automatic mechanical transmission of wheeled armored vehicles undertakes the important task of outputting engine power to the wheels, and once it fails, it will have a serious impact on the vehicle's mobility and battlefield survivability. Due to the harsh working environment of the vehicle, the sensors that characterize the state of the system may fail, especially when the system is in the process of operation, resulting in the inability to accurately close-loop control of the system. Therefore, after the failure of the sensor, an effective fault-tolerant control method is extremely critical to the driving safety and power guarantee of the vehicle. [0003] With the improvement of system fault diagnosis a...
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IPC IPC(8): F16H61/02F16H61/12F16H61/26F16H61/68G06K9/62G06V10/764
CPCF16H61/0213F16H61/12F16H61/26F16H61/68F16H2061/0093F16H2061/1224F16H2061/1272F16H2061/1284F16H2306/20G06F18/24323Y02T10/40
Inventor 刘海鸥卢佳兴陶俊峰赵亦农
Owner BEIJING INSTITUTE OF TECHNOLOGYGY