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Capacitive Fuel Gauging System Accuracies
Published August 12, 2016 by SAE International in United States
Downloadable datasets availableAnnotation ability available
This report is intended to identify the various errors typically encountered in capacitance fuel quantity measurement systems. In addition to identification of error sources, it describes the basic factors which cause the errors. When coupled with appraisals of the relative costs of minimizing the errors, this knowledge will furnish a tool with which to optimize gauging system accuracy, and thus, to obtain the optimum overall system within the constraints imposed by both design and budgetary considerations.
Since the subject of fuel measurement accuracy using capacitance based sensing is quite complex, no attempt is made herein to present a fully-comprehensive evaluation of all factors affecting gauging system accuracy. Rather, the major contributors to gauging system inaccuracy are discussed and emphasis is given to simplicity and clarity, somewhat at the expense of completeness.
An overview of capacitive fuel gauging operation can be found in AIR5691. This document also discusses how to analyze fuel gauging system accuracy as a result of combining the effects of the error sources described here.
This document is intended as a complement to AIR5691, and gives more detail on error sources which should be considered in the design of capacitive gauging systems. Note that it is completely revised from Issue A, hence no change bars are provided in this issue.
Data Sets - Support Documents
|[Unnamed Dataset 1]|
|[Unnamed Dataset 2]||Part 1a: Errors controlled by the airframe manufacturer|
|[Unnamed Dataset 3]||Part 1b: Errors jointly controlled by the airframe manufacturer and gauging system supplier|
|[Unnamed Dataset 4]||Part 1c: Errors mainly controlled by the gauging system supplier|
|[Unnamed Dataset 5]||Part 1d: Errors not controlled by the airframe manufacturer or the gauging system supplier|