Method and apparatus for improving the accuracy of

专利名称：Method and apparatus for improving the

accuracy of closed loop controlled systems

发明人：Bernd Allenberg申请号：US07/594822申请日：19901009公开号：US05132897A公开日：19920721

摘要：The precision of a closed loop control system, for example of a loss- in-weightfeeder, having a controlled operating section and a closed loop controlling section, isimproved by adjusting the closed loop controlling section with regard to at least twostochastic precision disturbing signals. One such signal may represent disturbances thataffect a sensor for ascertaining the actual weight of the scale. The other value mayrepresent estimated bulk material density variations or disturbances. A model generator(7) provides spectra representing these disturbing values. A noise parameter estimator(17) selects those spectra most closely resembling the spectra of the disturbing valuesfor producing an adjusting signal that is used to adapt the closed loop controllingsection (5) to an optimal control. The closed loop controlling section (5) has connectedthereto an evaluating circuit (14) including the model generator (7) for performing thecorrection or adjustment.

申请人：CARL SCHENCK AG

代理人：W. G. Fasse

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