Patent ID: 6829515
Filing Date: 2004-12-07
Classification: G05B,G07C

Abstract:
A method for determining a parameter a(t) describing a change in a technical system caused by ageing, comprising the steps of:determining a usage-dependent performance quantity x(t) in the technical system; in accordance with a wear and tear model, producing a correlation between the determined usage-dependent performance quantity and the parameter a(t); and calculating internal to the technical system one of: i) the parameter a(t), and ii) a quantity derived from the parameter a(t); wherein: the determined usage-dependent performance quantity x(t) is retrievable external to the technical system, the wear and tear model is given by f=f(p,x(t),a(t))=0, a parameter vector p represents a usage-independent, system-immanent parameter, and the determined usage-dependent performance quantity xk(t) is retrieved external to the technical system after a usage time for each of K technical systems of a same technical class, and from the usage time, for each of the K technical systems, a corresponding parameter ak(tk) characterizing one of a wear and an ageing is determined and the parameter vector p for the technical system class is subsequently determined from K wear and tear models of the K technical systems, for k=1, . . . ,K.