Identification on modal coupling of a self-excited vibration of an automobile wiper

汽车雨刮器自激振动模态耦合辨识

基本信息

批准号：
08650282
负责人：
NAGAI Ken-ichi
金额：
$ 0.9万
依托单位：
GUNMA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

项目摘要

An automotive wiper swept of glass surface causes a self-excited vibration in several conditions. Research work is presented for a generation of the self-excited vibration of the wiper. Experimental stdies are conducted both of an actual wiper and a simplified wiper model. Toreveal the number of modes in the wipe vibration, evaluation by the maximum Lyapunov exponent is applid. Both in the experiment and the numerical simulation of wiper oscillation, it is found as followings ;1.The actual wiper oscillates with two degrees of freedom. Modes of vibration are classified with translating movement pivoted on the base and the pitching movement centered at the blade.2.The wiper vibration is excited by the self-excited vibration with a type of stick-slip motion.3.Both wiper movements along to the glass surface and perpendicular to the surface has a significant effect on the large amplitude vibration of the wiper. Aresponse by parametric excitation is also induced same in the large amplitude vibration.In the experiment of the wiper vibration taking the effect of blade deforrmation, following results are obtained.1.The wiper blade has characteristics of nonlinear restoring force included a post-buckled configuration.2.When the blade presses the glass in the nearly buckling load, the best sweeping condition is obtained.3.If the sweeping speed is slow in the practical wiper, intricated responses are generated by the many modes of the wiper vibration. When the sweeping speed increases, the response is shifted to a simplified vibration with two degrees of freedom.

玻璃表面扫荡的汽车刮水器在多种条件下会引起自激发的振动。研究工作是为了产生刮水器的自兴振动的一代。实验性染料都是实际的雨刮器和简化的雨刮器模型。 ToreVeal擦除振动中的模式数量，使用最大Lyapunov指数的评估。在实验和刮水器振荡的数值模拟中，都可以发现以下； 1。实际刮水器以两个自由度的振荡振荡。振动模式通过在底座上旋转的移动和以刀片为中心的倾斜运动进行分类。2。刮水器的振动受到自振动振动的激发。3。湿润运动的运动效果。3。湿巾运动沿着玻璃表面和表面垂直于玻璃表面具有重大影响，对大层振幅振动都具有显着影响。通过参数激发的反应在巨大的振幅振动中也引起了相同的引起。在实验雨刮器振动的实验中，以叶片的降低作用，获得了以下结果。1。1。刮水器叶片具有非线性恢复力的特征。实用的刮水器复杂的反应是由雨刮器振动的许多模式产生的。当扫描速度增加时，响应将移至具有两个自由度的简化振动。