Optimal estimation of transducer parameters

US8078433B2 · kind B2 · utility

Inventor

• Wolfgang Klippel · Dresden, DE

Key dates

• Filing date: Jan 22, 2008
• Grant date: Dec 13, 2011
• Expiry date: Jun 19, 2030

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F30/367
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

The invention relates to an arrangement and method for estimating the linear and nonlinear parameters of a model 11 describing a transducer 1 which converts input signals x(t) into output signals y(t) (e.g., electrical, mechanical or acoustical signals). Transducers of this kind are primarily actuators (loudspeakers) and sensors (microphones), but also electrical systems for storing, transmitting and converting signals. The model describes the internal states of the transducer and the transfer behavior between input and output both in the small-and large-signal domain. This information is the basis for measurement applications, quality assessment, failure diagnostics and for controlling the transducer actively. The identification of linear and nonlinear parameters Pl and Pn of the model without systematic error (bias) is the objective of the current invention. This is achieved by using a transformation system 55 to estimate the linear parameters Pl and the nonlinear parameters Pn with separate cost functions.