Challenges of Designing a 13-Hz High-Load Vibration Isolation System with Tight Volume Constraints: Lessons Learnt and Path Forward

摘要

This paper describes the design of a passive isolation system using D-struts® to isolate an opticalrnpayload from aircraft-borne jitter with challenging stroke per volume requirements. It discusses the use ofrnviscoelastic-coated D-struts® that meet the customer performance and outgassing specification, NASA-rn1124. The result was a relatively soft isolation system, (where the first mode was 13 Hz), with eachrnindividual strut capable of withstanding loads on the order of magnitude of 623 N (140 lbf), weighing lessrnthan 910 g (2 lbm), fitting in a volume 5.1 cm (2 inches) in diameter and 12-cm (4.7-inches) long andrncapable of performing up to 1000 Hz without nonlinearities.