基于多维关联规则的车辆故障码解耦方法研究

doi:10.19562/j.chinasae.qcgc.2024.01.017

Abstract

Abstract:

A DTC decoupling method for complex coupling faults of vehicles is proposed in this paper. Firstly， by analyzing the complex association of DTCs through the principle of vehicle fault self-diagnosis and the propagation process of fault signals， the strong association relationship between DTCs is mined combined with the association rule technology and the multidimensional association rules of DTC are defined. Secondly， the FP-Growth algorithm for DTC multidimensional association rule mining is improved by the characteristics of the DTCs dataset. Finally， the DTC association knowledge graph is constructed by multidimensional association rules to realize complex DTCs decoupling by combining graph theory. The results show that this method can effectively reduce the number and complexity of DTCs， and improve the efficiency of troubleshooting faults based on DTCs.

Key words: diagnostic trouble code （DTC）, decoupling, multidimensional association rule, knowledge graph

Jie Hu, Haihua Qing, Min Wei, Huangzheng Geng, Xiao Zhang, Lin Chen. Research on Vehicle Diagnostic Trouble Code Decoupling Method Based on Multidimensional Association Rule[J].Automotive Engineering, 2024, 46(1): 161-169.

Figures/Tables 19

事务数据	DTC所属模块
事务数据	EPS	BMS	…	VCU
$T 1$	C100016， C166001， U198081	P110416， U007300	…	U1D0087， B108D00， B101914
$T 2$	U198087	P180616	…	B104A00， B102811
$T 3$	U140287， C166001	P182000， P110416	…	——
$T 4$	C166001	P182400	…	B100016， B104800
$T 5$	U198087， C166001	P180117， P182000， P182400	…	B102A00， U1A1181， B101914

节点属性	含义
Father	父节点
Children	子节点
Count	该分支节点频次
nodeLink	指向下一个分支相同节点
$n o d e O r d e r *$	节点在项头表的逆序索引值 $? *$

数据量	原算法 $t 1$ /s	改进后 $t 2$ /s	速度提升/%
2 000	6.74	2.25	66.70
4 000	7.91	3.94	50.18
6 000	8.23	4.76	42.16
8 000	16.01	5.30	66.90
10 000	内存溢出	11.43
20 000	内存溢出	66.31

References 16

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车型	Ecu	编码	状态	时间	Vin
E…	BMS	U180187	当前	2022/6/6 9：00：58	LK6…
E…	OBC	P1A2212	当前	2022/6/6 9：00：58	LK6…
E…	BMS	P180516	历史	2022/6/6 8：59：36	LK6…
E…	BMS	P181900	历史	2022/6/6 8：59：36	LK6…
E…	IC	U1C0287	当前	2021/7/2 11：41：55	LK6…
E…	ESP	C112224	当前	2021/7/2 11：41：55	LK6…
E…	…	…	…	…	…

节点属性	属性值
<id>	412
name	B104B00
故障定义	电池包总电压状态——电压过低
所属模块	VCU
是否报文故障	否
发生频次	132
衍生DTC	B104A00、B104C00、B105C00、B107C00

DTC	DTC含义
B104B00	电池包总电压状态--电压过低
B104C00	电池内部CAN总线异常
B105C00	电池包温度传感器异常
B107C00	电池包单体电压传感器异常
B104A00	电池包告警级别--电池停车请求
P183016	电池组总压低于4级告警门限值
P191200	电池温度传感器故障
B101311	PTC1使能回路对地短路

故障代号	常见故障	频次	精简率R/%
I	电池单体电压压差大	202	82.53
II	轮胎压力传感器故障	181	74.15
III	左前轮速传感器故障	156	69.51
IV	充电模块故障	57	58.13
V	电池单体温度过高	109	79.24

Research on Vehicle Diagnostic Trouble Code Decoupling Method Based on Multidimensional Association Rule

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