Paper Title:
A Conceptual Model of Micro Inertial Sensor Mimicking Amplifying Mechanism of the Hair Cells
  Abstract

The inner ear hair cells, the receptors sensing mechanical stimuli such as acoustic vibration and acceleration, achieve remarkably high sensitivity to miniscule stimuli by selectively amplifying small inputs. The gating springs hypothesis proposes that a phenomenon called negative stiffness is responsible for the nonlinear sensitivity. According to the hypothesis, the bundle becomes more sensitive in certain region as its stiffness changes due to the opening or closing of transduction channels, which in turn exert force in the same direction of the bundle’s displacement. In this study, we developed a conceptual model of an inertial sensor inspired by the inner ear hair cells, focusing on the hair cell’s amplifying mechanism known as negative stiffness. The negative stiffness was applied to a simple mass-spring-damper system with nonlinear spring derived from gating springs hypothesis. Sinusoidal stimuli of 0.1Hz~10Hz with magnitude of 1pN to 1000pN were applied to the system to match the dynamic range of vestibular organs. Simulation on this nonlinear model was performed on MATLAB, and power transfers and sensitivities in both transient and steady states were obtained and compared with those from the system with linear spring. Parameters were chosen in relation to those of the hair bundle to reproduce operating conditions of both the hair cells and micro inertial sensors. The suggested model displayed compressive nonlinear sensitivity resulting from selective amplification of smaller stimuli despite the energy loss due to large viscous damping typical in micro systems.

  Info
Periodical
Key Engineering Materials (Volumes 326-328)
Edited by
Soon-Bok Lee and Yun-Jae Kim
Pages
827-830
DOI
10.4028/www.scientific.net/KEM.326-328.827
Citation
K. E. Lim, S. Y. Park, "A Conceptual Model of Micro Inertial Sensor Mimicking Amplifying Mechanism of the Hair Cells", Key Engineering Materials, Vols. 326-328, pp. 827-830, 2006
Online since
December 2006
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Ze Jin Shang, Zhong Min Wang
Abstract:The recovery force of shape memory alloy spring is described by using polynomial constitutive equation. The nonlinear dynamic model of forced...
3958
Authors: Jie Ji, Yun Wu Li, Jin Dou Zhao
Chapter 4: Engineering Optimization
Abstract:A reverse analysis method for determining the stiffness characteristics of nonlinear suspension spring with variable pitch and wire diameter...
783
  | Authors: Yong Yi Gao, Shi Ping Zhan, Ban Gyan Li
Chapter 8: Applied Mechanics and Design
Abstract:The nonlinear dynamics equation of passive vibration isolator is established in this paper. According to the nonlinear vibration theory, the...
978
Authors: Xiao Hao Li, Jie Liu
Chapter 2: Materials Engineering and Production Technologies
Abstract:Based on the Lagrange equations, and aimed to the harmonic vibration synchronization problem of the nonlinear vibration machine that driven...
208
Authors: Zi Yue Zhao, Zhi Hong Fan, Jing Jun Zhang, Zi Qiang Xia
Chapter 1: Product Design, Manufacturing and Analysis
Abstract:In this paper, in order to study the effect of nonlinear suspension system, a nonlinear dynamic model considering nonlinearity of suspension...
443