Dynamic Fluid in a Porous Transducer-BasedAngular Accelerometer

Sensors

Meiling Wang¹  Siyuan Cheng¹  Huijin Fu¹  Li Ming¹  Tonglei Wang¹  Mengyin Fu¹ 

[1] School of Automation, Beijing Institute of Technology, Beijing 100081, China;

关键词: angular accelerometer;    porous transducer;    fluid transients;    wave speed;    dynamic permeability;    streaming potential;    sensor optimization;   

DOI  :  10.3390/s17020416

来源: DOAJ

【 摘 要 】

This paper presents a theoretical model of the dynamics of liquid flow in an angular accelerometer comprising a porous transducer in a circular tube of liquid. Wave speed and dynamic permeability of the transducer are considered to describe the relation between angular acceleration and the differential pressure on the transducer. The permeability and streaming potential coupling coefficient of the transducer are determined in the experiments, and special prototypes are utilized to validate the theoretical model in both the frequency and time domains. The model is applied to analyze the influence of structural parameters on the frequency response and the transient response of the fluidic system. It is shown that the radius of the circular tube and the wave speed affect the low frequency gain, as well as the bandwidth of the sensor. The hydrodynamic resistance of the transducer and the cross-section radius of the circular tube can be used to control the transient performance. The proposed model provides the basic techniques to achieve the optimization of the angular accelerometer together with the methodology to control the wave speed and the hydrodynamic resistance of the transducer.

【 授权许可】

Unknown