title: Dynamic Fluid in a Porous Transducer-Based Angular Accelerometer.
abstract: 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.
authors.affiliation: School of Automation, Beijing Institute of Technology, Beijing 100081, China. cheng901229@bit.edu.cn.
authors.forename: Siyuan
authors.initials: S
authors.lastname: Cheng
authors.affiliation: School of Automation, Beijing Institute of Technology, Beijing 100081, China. fumy@bit.edu.cn.|School of Automation, Nanjing University of Science and Technology, Nanjing 210094, China. fumy@bit.edu.cn.
authors.forename: Mengyin
authors.initials: M
authors.lastname: Fu
authors.affiliation: School of Automation, Beijing Institute of Technology, Beijing 100081, China. wangml@bit.edu.cn.
authors.forename: Meiling
authors.initials: M
authors.lastname: Wang
authors.affiliation: School of Automation, Beijing Institute of Technology, Beijing 100081, China. mingllove@bit.edu.cn.
authors.forename: Li
authors.initials: L
authors.lastname: Ming
authors.affiliation: School of Automation, Beijing Institute of Technology, Beijing 100081, China. 2120160891@bit.edu.cn.
authors.forename: Huijin
authors.initials: H
authors.lastname: Fu
authors.affiliation: School of Automation, Beijing Institute of Technology, Beijing 100081, China. Catkin72@bit.edu.cn.|Beijing Automation Control Equipment Institute, Beijing 100074, China. Catkin72@bit.edu.cn.
authors.forename: Tonglei
authors.initials: T
authors.lastname: Wang
keywords: angular accelerometer; dynamic permeability; fluid transients; porous transducer; sensor optimization; streaming potential; wave speed