Method and apparatus for evaluating a process and a method and apparatus for identifying at least one new disturbance variables - variable according to the invention in a process as a rule, the circle

摘要

A method for evaluating a process with at least one measured as a rule, the circuit input, a measured as a rule, the circle of delivery and a plurality of known and unknown disturbance variables, wherein said method comprising:Generating (16) of a forecast model of the process using a parameter estimation, including a predicting a model delay is generally circle;Calculating a rule circuit model rest (18) between the measured as a rule, the circle of delivery and the predicted model delivery; characterised byApplying (28) of an orthogonal decomposition process, about orthogonal, latent variables which, with the regulating circuit model radical correlating and which is successively decreasing changes of the control circuit model radical are responsible, and linking (34, 40, 46) of different weightings between the number of known disturbance variables and each of the latent variables;Calculating (48) of a disturbance variables model radical, of the orthogonally with respect to the latent variables and is mainly a rule circle change, from the unknown variables, in that the successive orthogonal, latent variables of the regulating circuit model radical to be subtracted;Performing (60) of a time series analysis by means of the disturbance variables model radical errors by using the model delay as a rule, circle, so that the disturbance variables model radical in a controllable component and a fixed component to be dismantled;Calculating (66) of a minimum achievable in a circle on the basis of a selective removal of certain latent variable by calculating the total of not - controllable components of the disturbance variables model radical and the remaining latent variables;Calculating (68) of a rule circle function characteristic number as a ratio of a standard deviation of the measured delivery of a circle with respect to the calculated minimum achievable in a circle; andPerforming (70) of a rule circle diagnosis, if the control circuit function characteristic number exceeds a predetermined amount.