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http://dx.doi.org/10.20910/JASE.2021.15.5.33

Study of the Incremental Dynamic Inversion Control to Prevent the Over-G in the Transonic Flight Region  

Jin, Tae-beom (Korea Aerospace Industries, LTD)
Kim, Chong-sup (Korea Aerospace Industries, LTD)
Koh, Gi-Oak (Korea Aerospace Industries, LTD)
Kim, Byoung-Soo (Gyeongsang National University)
Publication Information
Journal of Aerospace System Engineering / v.15, no.5, 2021 , pp. 33-42 More about this Journal
Abstract
Modern aircraft fighters improve the maneuverability and performance with the RSS (Relaxed Static Stability) concept and therefore these aircrafts are susceptible to abrupt pitch-up in the transonic and moderate Angle-of-Attack (AoA) flight region where the shock wave is formed and the mean aerodynamic center is moved forward during deceleration. Also, the modeling of the aircraft flying in this flight region is very difficult due to complex flow filed and unpredictable dynamic characteristics and the model-based control design technique does not fully cover this problem. In this paper, we analyzed the performance of the TPMC (Transonic Pitching Moment Compensation) control based on the model-based IDI (Incremental Dynamic Inversion) and the Hybrid IDI based on the model and sensor based IDI during the SDT (Slow Down Turn) in transonic region. As the result, the Hybrid IDI had quicker response and the same maximum g suppression performance and provided the predictable flying qualities compared to the TPMC control. The Hybrid IDI improved the performance of the Over-G protection controller in the transonic and moderate AoA region
Keywords
IDI; Hybrid IDI; Over-G Protection; Transonic flight region;
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