Harmonically excited elasto-mechanical structure`s modal analysis performing method for airplane, involves photogrammetrically measuring position of fine point of structure at time of maximum or minimum force of excitation

摘要

The method involves photogrammetrically measuring a position of a fine point (5) of an electro-mechanical structure (2) at a time of the maximum or minimum force of excitation. A path that is over-struck by the fine point during the oscillations of the structure is photogrammetrically measured. A relative phase is determined from the position of the fine point at the time of the maximum or minimum force of the excitation within the path over-striking by the points. The amplitude of the oscillations of the structure is determined at a location of the fine point from the path.