A nonlinear inverse problem in estimating the heat flux of the disc in a disc brake system

Yu Ching Yang, Wen Lih Chen

Research output: Contribution to journalArticlepeer-review

62 Citations (Scopus)

Abstract

In this study, an inverse algorithm based on the conjugate gradient method and the discrepancy principle is applied to estimate the unknown space- and time-dependent heat flux of the disc in a disc brake system from the knowledge of temperature measurements taken within the disc. In the direct problem, the specific heat and thermal conductivity are functions of temperature; hence this is a nonlinear inverse problem. The temperature data obtained from the direct problem are used to simulate the temperature measurements, and the effect of the errors in these measurements upon the precision of the estimated results is also considered. Results show that an excellent estimation on the space- and time-dependent heat flux can be obtained for the test cases considered in this study. The current methodology can be also applied to the prediction of heat flux in the pads, and then the heat partition coefficient between the disc and the pad in a brake system can be calculated.

Original languageEnglish
Pages (from-to)2439-2448
Number of pages10
JournalApplied Thermal Engineering
Volume31
Issue number14-15
DOIs
Publication statusPublished - 2011 Oct

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Industrial and Manufacturing Engineering

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