Fabreeka has designed a number of “soft support systems” (SSS) using standard and custom pneumatic isolators for ground vibration testing (GVT) of aircraft. To obtain accurate results during GVT, the modal testing of the aircraft requires simulation of a “free-free” condition. To achieve this condition, Fabreeka works with the structural and dynamics testing groups of aircraft manufacturers to design the required SSS for the GVT.
The pneumatic isolators support and decouple the aircraft from the ground when the aircraft is undergoing dynamic testing and modal/flutter analysis. The role of the system is especially important in identifying structural resonances and validating flutter models. The SSS can also include a jacking system to lift the aircraft off of its landing gear.