Parameterization and optimisation of EMC balances based on the frequency response of the impedance

In this paper, a method for deriving significant parameters for the description of the dynamic behaviour of electromagnetic force compensated load cells (EMC) from its frequency response of the impedance is presented. With these parameters, the dynamic behaviour of a load cell can be described and classified near its main resonance frequency. By going the inverse way the load cell can be designed based on the favored parameters to fulfil certain criteria concerning the dynamic behaviour. This method is based on the estimation of parameters characterising the behaviour of electrodynamic speakers, called Thiele-Small parameters, which is state of the art for designing loudspeakers. It will be demonstrated that the controller design for EMC load cells can be based on the derived parameters.