Transactions of Nanjing University of Aeronautics & Astronautics
Uncertain Modal Analysis of Unmanned Aircraft Composite Landing Gear
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Abstract:
Through taking uncertain mechanical parameters of composites into consideration， this paper carries out uncertain modal analysis for an unmanned aircraft landing gear. By describing correlated multi-dimensional mechanical parameters as a convex polyhedral model， the modal analysis problem of a composite landing gear is transferred into a linear fractional programming（LFR） eigenvalue solution problem. As a consequent， the extreme-point algorithm is proposed to estimate lower and upper bounds of eigenvalues， namely the exact results of eigenvalues can be easily obtained at the extreme-point locations of the convex polyhedral model. The simulation results show that the proposed model and algorithm can play an important role in the eigenvalue solution problem and possess valuable engineering significance. It will be a powerful and effective tool for further vibration analysis for the landing gear.
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TU311
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