| 摘要 |
A system for suppressing frequency variant disturbances in a feedback control system, wherein the system is a inner feedback loop in the feedback control system comprising a real system connected to a first filtering means, which is connected to a frequency estimation means and a system modelling means, wherein said system modelling means is connected to a second filtering means via a subtraction means, characterized in that the frequency estimation means comprises means for estimating the main frequency of a disturbance, the first filtering means removes the frequency content in a first feedback signal around the estimated main frequency, the second filtering means removes the frequency content in a second feedback signal around the estimated main frequency, the system modelling means comprises means arranged to use an second input signal from the first filtering means and the estimated main frequency for modelling and compensating for the damping and the phase loss of the real system, and the subtraction means is arranged to subtract an first output signal from the second filtering means from an second output signal from the system modelling means to get an estimated disturbance signal added to the first input signal of the inner feedback loop. |
