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Aeroelastic Gust Alleviation Including Control Surface Nonlinearities

Grant number: 18/25194-6
Support Opportunities:Scholarships abroad - Research
Effective date (Start): June 03, 2019
Effective date (End): March 19, 2020
Field of knowledge:Engineering - Mechanical Engineering - Mechanics of Solids
Principal Investigator:Douglas Domingues Bueno
Grantee:Douglas Domingues Bueno
Host Investigator: Earl Dowell
Host Institution: Faculdade de Engenharia (FEIS). Universidade Estadual Paulista (UNESP). Campus de Ilha Solteira. Ilha Solteira , SP, Brazil
Research place: Duke University, United States  


This proposal of post doctoral research comprises to develop a new methodology to design an active controller to generate aeroelastic gust alleviation including control surface asymmetric nonlinearities. In particular will be consider asymmetric freeplay and stiffness and the methodology will be based on the Fuzzy Takagi-Sugeno modeling which will be solved by Linear Matrix Inequalities (LMIs) to design a linear controller to act on the nonlinear system. The methodology will be firstly developed for the three degree of freedom typical section airfoil considering aerodynamic forces from Theoderson's theory. The mathematical model will be written in the state space representation using the Laguerre complex polynomials to write the aerodynamic forces in time domain. It will be used the Lyapunov's stability function and LMIs to solve a convex optimization problem. Time simulations with different discrete gust conditions will be carry out to compare the system with and without control forces.

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Scientific publications (7)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
BUENO, DOUGLAS D.; WAYHS-LOPES, LARISSA D.; DOWELL, EARL H.. Control-Surface Structural Nonlinearities in Aeroelasticity: A State of the Art Review. AIAA JOURNAL, v. N/A, p. 13-pg., . (19/22730-7, 18/25194-6)
RODRIGUES, DANIEL L.; DOWELL, EARL H.; BUENO, DOUGLAS D.. On the stiffness and damping characteristics of magnetorheological dampers and their implications for flutter analysis. ENGINEERING RESEARCH EXPRESS, v. 2, n. 1, p. 18-pg., . (18/25194-6, 17/15337-1)
BUENO, DOUGLAS D.; DOWELL, EARL H.. Revisiting the Fundamentals of Control Surface Reversal Including Nonlinear Effects. JOURNAL OF AIRCRAFT, v. 57, n. 6, p. 1212-1219, . (18/25194-6)
BUENO, DOUGLAS D.; GONSALEZ BUENO, CAMILA G.; DOWELL, EARL H.. A modal approach for designing controllers for active flutter suppression. Journal of the Brazilian Society of Mechanical Sciences and Engineering, v. 43, n. 1, . (18/25194-6)
BUENO, DOUGLAS D.; DOWELL, EARL H.. A note on the state space representation of aeroelastic systems for time domain analysis. JOURNAL OF FLUIDS AND STRUCTURES, v. 104, . (18/25194-6)
WAYHS-LOPES, LARISSA DREWS; DOWELL, EARL H.; BUENO, DOUGLAS D.. Influence of friction and asymmetric freeplay on the limit cycle oscillation in aeroelastic system: An extended Henon's technique to temporal integration. JOURNAL OF FLUIDS AND STRUCTURES, v. 96, . (18/23348-6, 18/25194-6, 17/08008-1)
RIBEIRO, FREDERICO A.; DOWELL, EARL H.; BUENO, DOUGLAS D.. Enhancement to Least Square-Based Approach for Time-Domain Unsteady Aerodynamic Approximation. JOURNAL OF AIRCRAFT, v. 58, n. 1, p. 111-124, . (18/25194-6)

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