| 摘要 |
The invention relates to a method for determining and/or monitoring at least one process- and/or system-specific parameter in automation technology, wherein a system that can oscillate is provided, which interacts at least intermittently with a medium situated in a container, the system that can oscillate is excited to oscillate by means of a real input signal, the real output signal of the system that can oscillate is determined, the real output signal is digitised and a real output sequence yu(k) is generated, the real input signal is digitised and a digital input sequence (u(k)) is generated. The digital input sequence (u(k)) is fed to a function block (model) that provides at least one mathematical model, which is defined by a plurality of process- and/or system-specific parameters, of the system that can oscillate in interaction with the medium. A virtual output sequence (ym(k)) is generated by means of the mathematical model, and the virtual output sequence ym(k) is compared with the real output sequence yu(k)/ In the event of a deviation, at least one of the process- and/or system-specific parameters of the mathematical model is changed adaptively until the deviation between the virtual output signal and the real output signal of the unit that can oscillate is within a predefined tolerance range, and at least one of the process-specific and/or system-specific parameters is made available. |
