Tesla, Inc.

Google Inc.

Gunjan Agarwal

Christopher Lillywhite

Sundaresan Avudaiappan

Arun Prakash Raghupathy

Darren Torrie

Laura Charlotte Shumaker

Neha Ravi Dixit

Paul L Briant

Liang Cheng

Ayyana Mori Chakravartula

Janet P Ho

Kaitlin S Spak

Daniel Mennitt

A coating system includes an electrocoat (e-coat) bath having an e-coat fluid with a first amount of dissolved gases, a plurality of ultrasonic transducers mounted on at least two sides of the e-coat bath, a carrier frame and control circuitry. The control circuitry is configured to control a trajectory of a metal part dipped in the e-coat bath using the carrier frame, control the plurality of ultrasonic transducers to direct a plurality of acoustic waves at a defined ultrasonic operating frequency and at a first intensity to cause a plurality of localized pressure drops in the e-coat fluid, the first amount of dissolved gases is reduced or removed as bubbles from the e-coat fluid of the e-coat bath based on the directed plurality of acoustic waves, and increase the first intensity of the directed plurality of acoustic waves over a defined time period to accelerate dispersion of an e-coat pigment.

Coating system and method for e-coating and degasification of e-coat fluid during e-coat

The present document describes techniques associated with a textile-material model for vibroacoustic structural simulation. The techniques described herein provide a nontrivial methodology to test a textile and simplify its representation, which can enable prediction of acoustic performance (e.g., rub and buzz) of an electronic-speaker device having a textile mounted thereon. The textile is modeled as a textile-material model based on an elongation stiffness obtained from a time-temperature superposition curve of the textile, which is based on a dynamic mechanical analysis test of the textile in each of course and wale directions. The textile-material model is then applied to an assembly model of the electronic-speaker device to simulate a vibroacoustic response of the textile relative to the assembly model to predict a likelihood of rub and buzz.

Textile-material model for vibroacoustic structural simulation

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Mountain View, CA, United States of America

Gunjan Agarwal