车辆转弯工况下间接式胎压监测系统脉冲数的修正

doi:10.3969/j.issn.1674-8484.2021.04.009

摘要/Abstract

摘要：

分析了以脉冲法为原理的间接式胎压监测系统在车辆转弯工况下误报警的原因,是将正常胎压下的外侧车轮误判为缺气。利用方向盘转角作为修正参数,建立汽车转弯时的几何关系模型。分析了汽车转弯行驶时轮胎侧偏、车厢侧倾和转向系变形对内外侧车轮脉冲差的影响,提出了利用反向传播(BP)神经网络训练法对转弯工况下的外侧车轮脉冲数进行修正,构建一个3层的BP神经网络,将转弯时的车轮脉冲数等效为直线行驶时的脉冲数。结果表明：BP神经网络训练法对脉冲差拟合的决定因数为0.995,修正后的误报率为0;因此,本修正方法效果良好。

关键词: 汽车安全, 间接式胎压监测, 车辆转弯工况, 脉冲数修正方法, 反向传播(BP)神经网络

Abstract:

This paper analyzed the reason why the indirect tire pressure monitoring system based on pulse method gives false alarm, because the vehicle outside wheel under normal tire pressure is misjudged as lack of air. Established a geometric relationship model of automobile turning by using the steering wheel angle as the correction parameter. Analyzed the effects of tire deflection, carriage roll and steering system deformation on the inner-lateral wheel pulse difference when the vehicle was turning. Proposed a Back-Propagation (BP) neural-network training method to modify the pulse number of the outside wheel under the turning condition. Constructed a three-layer BP neural network. The number of wheel pulses when turning was equivalent to that when driving in a straight line. The results show that the determination coefficient of the BP neural-network training method for the pulse difference fitting is 0.995, and the false alarm rate under the turning condition after correction is 0. Therefore, the correction method has a good effect.

Key words: automotive safety, indirect tire pressure monitoring, vehicle turing condition, pulse number correction method, back propagation (BP) neural network

中图分类号:

U461.91

王宝琳, 夏怀成, 董倩倩. 车辆转弯工况下间接式胎压监测系统脉冲数的修正[J]. 汽车安全与节能学报, 2021, 12(4): 507-515.

WANG Baolin, XIA Huaicheng, DONG Qianqian. Correction for pulse number of indirect tire pressure monitoring system under vehicle turning condition[J]. Journal of Automotive Safety and Energy, 2021, 12(4): 507-515.

图/表 15

参考文献 15

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路面	摩擦因数良好的水平柏油道路
胎压	4轮皆为230 kPa
载荷	汽车满载
数据采集截止条件	左后轮脉冲数达到100个
数据类型	4轮标准脉冲数
车速范围	5~60 km·h^-1
方向盘转角范围	10°~560°

路面	摩擦因数良好的水平柏油道路
胎压	4轮皆为230 kPa
载荷	汽车满载
数据采集截止条件	左后轮脉冲数达到100个
数据类型	4轮标准脉冲数
车速范围	5~60 km·h^-1
方向盘转角范围	10°~560°

方向盘转角/(°)	车速/ (km·h^-1)	标准脉冲数/个				原始∆N₄/个	修正后的标准脉冲数/个				修正后∆N_f₄/个
方向盘转角/(°)	车速/ (km·h^-1)	N₁	N₂	N₃	N₄	原始∆N₄/个	N₁’	N₂’	N₃’	N₄’	修正后∆N_f₄/个
10.04	6.14	100	100	100	100	0.00	100	100	100	100	0.00
30.05	55.50	100	102	100	101	0.33	100	101	100	100	0.33
50.20	40.68	100	103	100	102	1.00	100	101	100	100	0.33
70.19	31.34	100	103	100	103	2.00	100	100	100	100	0.00
89.74	14.62	100	104	100	104	2.67	100	100	100	100	0.00
110.00	23.70	100	106	100	106	4.00	100	101	100	101	0.67
130.56	18.94	100	108	100	106	3.33	100	102	100	100	0.67
150.22	20.21	100	109	100	107	4.00	100	101	100	99	1.33
170.90	25.00	100	110	100	109	5.67	100	101	100	100	0.33
189.30	10.01	101	113	100	110	5.33	101	103	100	100	1.33
210.03	12.45	100	112	100	112	8.00	100	100	100	100	0.00
229.88	13.79	100	114	100	114	9.33	100	101	100	101	0.67
249.50	10.37	100	113	100	114	9.67	100	99	100	100	0.33
269.85	13.10	101	118	100	116	9.67	101	102	100	100	1.00
290.50	8.90	100	118	100	117	11.00	100	100	100	99	1.00
311.00	14.24	101	120	100	118	11.00	101	101	100	99	1.67
328.86	14.95	100	121	100	121	14.00	100	100	100	100	0.00
351.27	13.56	100	123	100	123	15.33	100	100	100	100	0.00
370.97	14.17	100	124	100	124	16.00	100	100	100	100	0.00
391.32	13.70	100	126	100	126	17.33	100	100	100	100	0.00
410.71	9.17	101	128	100	127	17.33	101	100	100	99	1.33
429.01	17.18	100	128	100	129	19.67	100	99	100	100	0.33
449.70	8.46	100	130	100	131	21.00	100	98	100	99	0.33
470.83	11.13	100	132	100	133	22.33	100	98	100	99	0.33
490.57	11.66	101	138	100	137	24.00	101	100	100	99	1.33

方向盘转角/(°)	车速/ (km·h^-1)	标准脉冲数/个				原始∆N₄/个	修正后的标准脉冲数/个				修正后∆N_f₄/个
方向盘转角/(°)	车速/ (km·h^-1)	N₁	N₂	N₃	N₄	原始∆N₄/个	N₁’	N₂’	N₃’	N₄’	修正后∆N_f₄/个
10.04	6.14	100	100	100	100	0.00	100	100	100	100	0.00
30.05	55.50	100	102	100	101	0.33	100	101	100	100	0.33
50.20	40.68	100	103	100	102	1.00	100	101	100	100	0.33
70.19	31.34	100	103	100	103	2.00	100	100	100	100	0.00
89.74	14.62	100	104	100	104	2.67	100	100	100	100	0.00
110.00	23.70	100	106	100	106	4.00	100	101	100	101	0.67
130.56	18.94	100	108	100	106	3.33	100	102	100	100	0.67
150.22	20.21	100	109	100	107	4.00	100	101	100	99	1.33
170.90	25.00	100	110	100	109	5.67	100	101	100	100	0.33
189.30	10.01	101	113	100	110	5.33	101	103	100	100	1.33
210.03	12.45	100	112	100	112	8.00	100	100	100	100	0.00
229.88	13.79	100	114	100	114	9.33	100	101	100	101	0.67
249.50	10.37	100	113	100	114	9.67	100	99	100	100	0.33
269.85	13.10	101	118	100	116	9.67	101	102	100	100	1.00
290.50	8.90	100	118	100	117	11.00	100	100	100	99	1.00
311.00	14.24	101	120	100	118	11.00	101	101	100	99	1.67
328.86	14.95	100	121	100	121	14.00	100	100	100	100	0.00
351.27	13.56	100	123	100	123	15.33	100	100	100	100	0.00
370.97	14.17	100	124	100	124	16.00	100	100	100	100	0.00
391.32	13.70	100	126	100	126	17.33	100	100	100	100	0.00
410.71	9.17	101	128	100	127	17.33	101	100	100	99	1.33
429.01	17.18	100	128	100	129	19.67	100	99	100	100	0.33
449.70	8.46	100	130	100	131	21.00	100	98	100	99	0.33
470.83	11.13	100	132	100	133	22.33	100	98	100	99	0.33
490.57	11.66	101	138	100	137	24.00	101	100	100	99	1.33