Patent ID: 8040021

Claim:
A vibration-damping device for an item of equipment that has to be moved comprising: a structure; a first element and a second fragile element to be protected from vibrations, the first element and the second fragile element coupled to said structure; a first piezoelectric transducer means inserted between said structure and said first element and arranged to convert mechanical energy of vibration of the structure into electric energy, at least one sensor coupled to the structure and arranged to deliver measurement signals representative of vibrations sustained by said item of equipment, a control means electrically powered by said electric energy and arranged to deduce from each measurement signal at least one amplitude of movement designed to compensate at least partially for said vibrations sustained by the structure, and to deliver control signals representative of the at least one amplitude, and a second piezoelectric transducer means inserted between said structure and said second fragile element and arranged to convert said control signals into movement so as to damp at least partially for the second fragile element, the vibrations sustained by said item of equipment.