磁流变减振器集成式压阻加速度传感器设计与试验

发布时间：2018-05-14 04:21

本文选题：压阻加速度传感器 + 磁流变减振器　；参考：《农业机械学报》2017年08期

【摘要】：为满足汽车半主动悬架磁流变减振器运行过程中健康状态监测的需求,提高传感系统的可靠性,设计了一种可以测量动态加速度的磁流变减振器外置集成式压阻加速度传感器。根据减振器的工作特性和压阻加速度传感器的特点,提出了减振器集成加速度传感器的概念,确定了集成方式。分析了集成式压阻传感器的设计原则并对芯片进行了结构选型。为保证传感器具有较大的灵敏度以及较好的动态特性,以测试量程为约束条件,采用理论模型推导与有限元仿真结合的方法,确定了芯片的主要尺寸参数,进一步通过理论分析完成了芯片的版图设计。参照设计的加速度传感器参数,进行了订制,在正弦和随机激励下对采用集成加速度传感器的磁流变减振器的单自由度悬架进行了测试与分析,结果证明所设计的加速度传感器具有较好的精度及动态稳定性,能够满足使用要求。
[Abstract]:In order to meet the need of monitoring the health state of the semi-active suspension magnetorheological shock absorber and improve the reliability of the sensing system, an external integrated piezoresistive acceleration sensor of the magnetorheological damper was designed to measure the dynamic acceleration. According to the working characteristics of shock absorber and the characteristics of piezoresistive acceleration sensor, the concept of integrated acceleration sensor of shock absorber is put forward, and the integrated mode is determined. The design principle of integrated piezoresistive sensor is analyzed and the chip structure is selected. In order to ensure that the sensor has higher sensitivity and better dynamic characteristics, the main dimension parameters of the chip are determined by the combination of theoretical model derivation and finite element simulation, taking the measurement range as the constraint condition. Furthermore, the layout design of the chip is completed by theoretical analysis. According to the parameters of the designed acceleration sensor, the single degree of freedom suspension of the magneto-rheological absorber with integrated acceleration sensor is tested and analyzed under sinusoidal and random excitation. The results show that the designed accelerometer has good accuracy and dynamic stability and can meet the requirements of application.
【作者单位】：重庆大学机械传动国家重点实验室;
【基金】：国家自然科学基金项目(51275539、51675063) 重庆市研究生科技创新项目(CYB15017)
【分类号】：TB535.1;TP212

【相似文献】