Abstract
The paper presents major issues associated with the problem of modelling
change output accelerometers. The presented solutions are based on the
weighted least squares (WLS) method using transformation of the complex
frequency response of the sensors. The main assumptions of the WLS method
and a mathematical model of charge output accelerometers are presented in
first two sections of this paper. In the next sections applying the WLS
method to estimation of the accelerometer model parameters is discussed
and the associated uncertainties are determined. Finally, the results of
modelling a PCB357B73 charge output accelerometer are analysed in the last
section of this paper. All calculations were executed using the MathCad
software program. The main stages of these calculations are presented in
Appendices A−E.
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