Admittance Identification from Point-wise Sound Pressure Measurements Using Reduced-order Modelling
نویسنده
چکیده
In this work an acoustic application is studied. The goal is to estimate the complex-valued admittance from given point measurements of the sound pressure. This parameter identification problem is formulated in terms of an infinite-dimensional optimization problem. First-and second-order optimality conditions are discussed. For the numerical realization a reduced-order model based on proper orthogonal decomposition is used. Numerical examples illustrate the efficiency of the proposed approach.
منابع مشابه
A New Procedure for Determining Current Harmonic Contribution around an Operation Point at PCC Using Load Modelling Based on Crossed Frequency Admittance Matrix
Abstract:Today, one of the important issues of power quality (PQ) in power systems is the current harmonics. Increasing expansion of nonlinear loads at different parts of the electric network makes harmonic distortion flow through the network. This causes the network to have background voltage and current harmonic distortion and even affect on the PQ of linear load performance. Therefore, it is...
متن کاملDigital Modeling of Bridge Driving-point Admittances from Measurements on Violin-family Instruments
We present a methodology for digital modeling ofD-dimensional driving-point bridge admittances from vibration measurements on instruments of the violin family. Our study, centered around the two-dimensional case for violin, viola, and cello, is based on using the modal framework to construct an admittance formulation providing physically meaningful and effective control over model parameters. I...
متن کاملEnd Conditions of Piano Strings
The end conditions of piano strings can be approximated by the input admittance at the bridge. Proper measurements of this value are therefore required. A method of validation of admittance measurements on simple structures is proposed in this paper. High resolution signal analysis performed on string’s vibrations yields an estimate for the input admittance. This method is implemented on a simp...
متن کاملAssessment and Control of Noise Pollution in Seal Gas Compressor of Reduction Unit 2 of a Steel Industry
Background and aims: Undoubtedly, noise and vibration are major problems of industrial world and lot of people are very exposed to these phenomena in their workplace or residential areas. Researchers have shown that exposure to noise may increase the risks related to personal health, like nervous frailty, extreme irritability, muscle cramps, stress and anxiety, dizziness, headache and migraine,...
متن کاملSolution of the Three-Dimensional Helmholtz Equation with Nonlocal Boundary Conditions
The Helmholtz equation is solved within a three-dimensional rectangular duct with a sound source at the duct entrance plane, local admittance conditions on the side walls, and a new, nonlocal radiation boundary condition at the duct exit plane. The formulation employs a truncation of an infinite matrix, the generalized modal admittance tensor, that represents the transformation of the modal pre...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- J. Optimization Theory and Applications
دوره 147 شماره
صفحات -
تاریخ انتشار 2010