Pasif ve Aktif Olarak Ok Açılı ve Anhedralli Pal Ucu Şekli Başkalaşan Helikopterin Kontrol Sistemi ile Beraber Eş Zamanlı ve Rassal Yeniden Tasarımı

Yıl 2024, Cilt: 14 Sayı: 2, 902 - 912, 18.06.2024

Firat Şal

https://doi.org/10.31466/kfbd.1451000

Öz

Bu araştırma yayınında pal ucundaki ok açısı ve anhedrali uçuş öncesinde pasif, uçuş sırasında ise aktif olarak başkalaşım yeteneğine sahip bir insanlı helikopterin otomatik uçuş kontrolünü sağlayan kontrol sistemi ile biraz önce bahsedilen başkalaşan parametrelerinin başkalaşım mekanizmaları eş zamanlı olarak rassal optimizasyon yöntemi ile yeniden tasarlanmaya çalışılıp en ekonomik bir şekilde otonom uçuşun sağlanması amaçlanmıştır. Bu çalışmada uçuş kontrol sistemi içinde varyans kısıtlı kontrolcüler, spesifik olarak çıkış varyansı kısıtlı kontrolcü kullanılmıştır. Rassal optimizasyon yöntemi olarak SPSA yani eş zamanlı pertürbasyon rassal yaklaştırım kullanılmıştır. Pale ucu geometrisinin ve helikopter otomatik uçuş kontrol sisteminin eş zamanlı tasarımı sonucunda kontrol çabasından oluşan maliyet fonksiyonunda, pasif ve aktif başkalaşımın beraber ele alındığı durumda bu başkalaşım yöntemlerinin tek tek ele alındığı duruma göre çok daha fazla tasarruf sağlanmıştır.

Anahtar Kelimeler

Helikopter, Rassal optimizasyon, Pale, Ok açısı, Anhedral, Uçuş kontrol sistemi

Simultaneous and Stochastic Passively and Actively Morphing Swept Anhedral Helicopter Blade Tip Shape and Control-System Redesign

Öz

In this research article a helicopter having blade tip swept angle and anhedral in both passive before flight and active during flight morphing cases and its automatic flight control system are simultaneously designed with stochastic optimization method and morphing mechanisms of previously mentioned features so that the most economical autonomous flight is satisfied. In this study inside of the flight control system variance constrained controllers specifically output variance constrained controller are used. As a stochastic optimization method SPSA (i.e., simultaneous perturbation stochastic approximation) is used. As a result much more control effort save is obtained when both passive and active morphing approaches are applied with respect the situation that one of these two morphing approaches are applied on simultaneous design of blade tip geometry and helicopter automatic flight control system.

Anahtar Kelimeler

Helicopter, Stochastic optimization, Blade, Swept angle, Anhedral, Flight control system

Kaynakça

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