On DSS Method for a Fast Identification of the Static and Dynamic   Responses of Servovalves
  In this work we consider a class of quasilinear systems of differential equations which allows to describe dynamics of electrohydraulic servovalves. A method for fast identification of static and dynamic responses, by a short-time experiment, is described. 
J.O. Dietz, V.M. Shashkov, M.V. Shashkov