Federico Roizner, Moti Karpel

DOI Number: N/A

Conference number: IFASD-2017-172

A new parametric flutter margin method for linear and nonlinear stability analysis of aeroservoelastic systems is presented. The method is based on frequency response calculations with the system stabilized using a single parameter, which facilitates convenient response calculations with smooth response variations with respect to excitation frequency and air velocity. The frequency response functions are used for generating flutter margins with respect to the added parameter. The linear flutter or nonlinear limit-cycle-oscillation conditions are those at which the margins are zero. The nonlinear process starts with a linear one, to which nonlinear effects are added using a non-iterative first-order harmonic-balance procedure. Two numerical examples, based on a generic transport aircraft model, are given: a linear one with a simple gust-alleviation control system, and a nonlinear one with controlsurface actuator free play. The results demonstrate excellent agreement with those obtained using traditional flutter methods and nonlinear time-marching simulations.

Read the full paper here

In Categories: 1.Events, Aeroservoelasticity, IFASD 2017
Email
Print
LinkedIn
The paper above was part of  proceedings of a CEAS event and as such the author has signed a publication agreement to have their paper published in the repository. In the case this paper is found somewhere else CEAS always links to the other source.  CEAS takes great care in making the correct content available to the reader. If any mistakes are found  in the listings please contact us directly at papers@aerospacerepository.org and we will correct the listing promptly.  CEAS cannot be held liable either for mistakes in editorial or technical aspects, nor for omissions, nor for the correctness of the content. In particular, CEAS does not guarantee completeness or correctness of information contained in external websites which can be accessed via links from CEAS’s websites. Despite accurate research on the content of such linked external websites, CEAS cannot be held liable for their content. Only the content providers of such external sites are liable for their content. Should you notice any mistake in technical or editorial aspects of the CEAS site, please do not hesitate to inform us.