汽车转向开关性能评价新方法的研究

发布时间：2018-11-23 21:13

【摘要】：随着现代科技和汽车产业的发展,汽车转向开关的操作性能的日益丰富,转向开关的设计也越来越不规则,而且大量新的产品设计必将继续涌现,可靠的科学的自动检测评价技术将成为检测汽车转向开关性能的必要手段。本文通过分析汽车转向开关传统的主观评价方法和筛选构建客观评价方法的必要参数,建立客观评价参数和主观评价结果的映射关系,从而提出一种全新的转向开关性能的客观评价方法。为了有效地构建客观评价方法,本文首先利用多元统计中的因子分析法对传统手感评价转向开关性能的10项主观评价因素进行分析,获得3个影响主观评价结果的因素：力感、摩擦感和行程感。然后通过对汽车转向开关内部结构和换挡过程进行分析,对应影响主观评价结果的因素,确定了转向开关的5个客观评价参数：换挡力Fm,拐点力Fc,上升时间t1,临界过程时间t2和再加力过程时间t3。在构建转向开关主观评价结果与客观评价参数映射关系的过程中,本文以长春一汽技术中心电气实验室测试试验台测得的100组转向开关评价参数为实验数据,建立基于Bayes判别法的客观评价方法。其中70组作为训练样本,建立判别准则,并验证判别准则的正确率,另外30组作为测试样本,进一步测试判别准则的准确性与可靠性。设置距离判别法、Fisher判别法和逐步判别法的对比实验,验证基于Bayes判别法的转向开关客观评价方法具有的优越性。综合分析各判别准则判断的判别结果,其中Bayes判别法建立的判别规则以训练样本和测试样本的正确率均为100.0%,绝对正确率分别为82.9%和86.7%,表现出更优的评价性能,证明了基于Bayes判别法的转向开关客观评价方法具有较高优越性。
[Abstract]:With the development of modern science and technology and automobile industry, the operating performance of automobile steering switch is becoming more and more abundant, the design of steering switch is becoming more and more irregular, and a large number of new product designs will continue to emerge. Reliable and scientific automatic detection and evaluation technology will become a necessary means to detect the performance of automobile steering switches. By analyzing the traditional subjective evaluation method of automobile steering switch and screening the necessary parameters to construct the objective evaluation method, the mapping relationship between objective evaluation parameters and subjective evaluation results is established in this paper. Thus, a new objective evaluation method of steering switch performance is proposed. In order to construct an objective evaluation method effectively, this paper first uses the factor analysis method in the multivariate statistics to analyze 10 subjective evaluation factors of the traditional hand feeling evaluation of steering switch performance, and obtains three factors that influence the subjective evaluation results: force sense. Sense of friction and travel. Then through the analysis of the internal structure and shift process of the automobile steering switch, corresponding to the factors influencing the subjective evaluation result, five objective evaluation parameters of the steering switch are determined: the shift force Fm, inflection point force Fc, rising time t 1, The critical process time t _ 2 and the reloading process time t _ 3. In the process of constructing the mapping relationship between subjective evaluation results and objective evaluation parameters of steering switches, 100 sets of evaluation parameters of steering switches measured by the electrical laboratory test bench of Changchun FAW Technology Center are taken as experimental data. An objective evaluation method based on Bayes discriminant method was established. The accuracy and reliability of the discriminant criteria were further tested in 70 groups as training samples and 30 groups as test samples. The comparison experiment of setting distance discriminant method, Fisher discriminant method and stepwise discriminant method verifies the superiority of the objective evaluation method based on Bayes discriminant method for steering switch. By synthetically analyzing the discriminant results of each discriminant criterion, the discriminant rules established by Bayes discriminant method are 100.0% for training sample and 86.7% for test sample, and the absolute correct rate is 82.9% and 86.7%, respectively. It is proved that the objective evaluation method of steering switch based on Bayes discriminant method has higher superiority.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U463.4

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