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TsAGI Science Journal

ISSN Print: 1948-2590
ISSN Online: 1948-2604

TsAGI Science Journal

DOI: 10.1615/TsAGISciJ.2015013365
pages 825-839

ON POSSIBILITY OF CRITICAL FLIGHT REGIME STUDY IN WIND TUNNELS USING THREE-DEGREE-OF-FREEDOM GIMBALS

Alexander Nikolaevich Khrabrov
Central Aerohydrodynamic Institute (TsAGI), Zhukovsky str. 1, Zhukovsky, 140180, Russia
Maria Evguenievna Sidoryuk
Central Aerohydrodynamic Institute (TsAGI), 1 Zhukovsky St., Zhukovsky, Moscow Region, 140180, Russia
Evgueniy Nikolaevich Kolesnikov
Central Aerohydrodynamic Institute (TsAGI), 1 Zhukovsky St., Zhukovsky, Moscow Region, 140180, Russia
Yuriy Alexandrovich Vinogradov
Central Aerohydrodynamic Institute (TsAGI), Zhukovsky str. 1, Zhukovsky, 140180, Russia
Igor Igorevich Grishin
Central Aerohydrodynamic Institute (TsAGI), Zhukovsky, Russia
Konstantin Anatolievich Kolinko
Central Aerohydrodynamic Institute (TsAGI), Zhukovsky str. 1, Zhukovsky, 140180, Russia

ABSTRACT

The possibility of wind tunnel investigations of high-angles-of-attack aircraft dynamics using an actively controlled scaled model on three-degree-of-freedom gimbals is shown. A kinematics of the model motion on the gimbals is presented. Dynamic equations of motion are derived from the Lagrange equations. The stability and controllability of aircraft motion without a control system and with aerodynamics specified in a conventional table form are considered. The wing rock motion of the aircraft model at high angles of attack is investigated. Simulations of self-induced oscillations on the gimbals and in free flight are compared. The effects on the dynamics of the gimbal friction moments and shift of the center of gravity in the model relative to the center of the gimbals are considered.


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