Ab Bofors

Rolf Hilding Sandlin

Sven Willner Eriksson

Hans Manne Salomonsson

Bengt Gustaf Lovung

The guidance system for a flying vehicle having at least one guidance channel for converting an error signal to a command signal for a control surface servo of the vehicle includes means for damping oscillations at the natural frequency of the vehicle. A damping means includes a notch filter in the guidance channel which serves to damp oscillations at the notch frequency. The notch frequency is controlled and conformed to the natural frequency of the vehicle, as the natural frequency of the vehicle varies with vehicle speed, by providing the notch filter with a signal related to vehicle speed. The notch filter is arranged to vary the notch frequency in accordance with the signal provided thereto.

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Karlskoga, Sweden

Rolf Hilding Sandlin