A multi-stage geometric approach for sensor fault isolation on engine test beds

Michael Wohlthan*, Doris Schadler, Gerhard Pirker, Andreas Wimmer

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The paper presents a new model based method for sensor fault isolation on engine test beds. The proposed multi-stage geometric approach is based on the geometrical analysis of error functions, which are obtained by Taylor series approximation. The geometric analysis includes intersection analysis and distance evaluation resulting in fault probability values for individual sensors. The method is able to process any type of static models, whether they are physics-base or databased, and whether they are available in the form of an equation or in the form of an inequality. Thus the method has very high general validity and is not limited to any specific application or test engine. Validation by a simulation study with measured data from a single-cylinder research engine shows good isolation results, especially with regard to the robustness against model errors.

Original languageEnglish
Article number108313
JournalMeasurement: Journal of the International Measurement Confederation
Publication statusPublished - 15 Jan 2021


  • Engine test bed
  • Error functions
  • Fault isolation
  • Geometric approach
  • Sensor faults

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering


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