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http://dx.doi.org/10.5139/JKSAS.2006.34.6.083

A Study on Aircraft Sensitivity Analysis for C.G Variation of Longitudinal Axis  

김종섭 (한국항공우주산업㈜)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.34, no.6, 2006 , pp. 83-91 More about this Journal
Abstract
An advanced method of Relaxed Static Stability (RSS) is utilized for improving the aerodynamic performance of modern version supersonic jet fighter aircraft. The flight control system utilizes RSS criteria in longitudinal axis to achieve performance enhancements and improve stability. The flight control law of T-50 advanced trainer employs RSS concept in order to improve the aerodynamic performance and guarantee aircraft stability. The longitudinal center of gravity(X-c.g) varies as a function of external stores, fuel state and gear position. Shifts in X-c.g relate directly to longitudinal static margin in aircraft stability. This paper deals the maximum aft X-c.g for critical aircraft loadings and checks static margin limits using sensitivity such as damping, natural frequency, gain and phase margin. And nonlinear analysis was conducted for such as short period input. And also, this paper shows the T-50 aircraft stability based on the result of high angle of attack flight such as upright and inverted departure.
Keywords
RSS(Relaxed Static Stability); X-c.g(Longitudinal Center of Gravity); Static Stability; Dynamic Stability;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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