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This paper introduces a methodology for the longitudinal flight simulation of the ornithopters. An integrative flight simulation framework for the ornithopters is proposed and the fluid-structure-interaction (FSI) was efficiently taken into account. It was realized through the construction of an ornithopter model with flexible wings and applying experimentally validated semi-empirical modified strip theory (MST) to calculate the aerodynamic forces exerted on the flexible flapping-wings. Flexible wings are modeled in the FEA software, ANSYS, and exported to the Multi-body dynamics software, MSC.ADAMS. MSC.ADAMS is used as a backbone of this simulation framework to solve the nonlinear equation of motion of the ornithopter with attached user-defined subroutine containing aerodynamic model for the flexible wings. Longitudinal trimmed level flights of a Magpie sized ornithopter model are simulated in the proposed simulation framework and several trim conditions were found with respect to the various flapping frequency.
World Automation Congress (WAC), 2010
Date of Conference: 19-23 Sept. 2010