Beamforming pointing error of a triaxial velocity sensor under gain uncertainties

College

College of Computer Studies

Department/Unit

Computer Technology

Document Type

Article

Source Title

Journal of the Acoustical Society of America

Volume

140

Issue

3

First Page

1675

Last Page

1685

Publication Date

9-1-2016

Abstract

A "triaxial velocity sensor" consists of three uniaxial velocity sensors, which are nominally identical, orthogonally oriented among themselves, and co-centered at one point in space. A triaxial velocity sensor measures the acoustic particle velocity vector, by its three Cartesian components, individually component-by-component, thereby offering azimuth-elevation two-dimensional spatial directivity, despite the physical compactness that comes with the collocation of its three components. This sensing system's azimuth-elevation beam-pattern has been much analyzed in the open literature, but only for an idealized case of the three uniaxial velocity sensors being exactly identical in gain. If this nominal identity is violated among the three uniaxial velocity sensors, as may occur in practical hardware, what would happen to the corresponding "spatial matched filter" beam-pattern's peak direction? How would this effective peak direction deviate from the nominal "look direction"? This paper, by modeling each uniaxial velocity sensor's gain as stochastic, derives this deviation's statistical mean and variance, analytically in closed mathematical forms. This analytical derivation is verified by Monte Carlo simulations. © 2016 Acoustical Society of America.

html

Digitial Object Identifier (DOI)

10.1121/1.4962290

Disciplines

Artificial Intelligence and Robotics

Keywords

Motion detectors; Speed; Monte Carlo method; Stochastic systems

Upload File

wf_yes

This document is currently not available here.

Share

COinS