1. A method for ascertaining a value of a physical variable in a position transducer system, comprising: providing a computation model, which maps a response of the position transducer system, the computation model including a model function and one or multiple parameters; ascertaining a value of at least one system variable at one or multiple points in time; determining the parameters of the computation model from one or multiple values of the at least one system variable determined at different points in time; and determining the value of the physical variable as a function of the one or the multiple determined parameters.