Perancangan Sistem Kendali Inner Loop Pada Pesawat CN235

Adiani, Chania Az-Zahra (2026) Perancangan Sistem Kendali Inner Loop Pada Pesawat CN235. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Keselamatan terbang bergantung pada kestabilan pesawat. Kestabilan pesawat tidak terlepas dari perilaku pesawat yang memberikan pola reaksi sebagai mode pada gerak longitudinal dan gerak lateral - directional pesawat. Penelitian ini bertujuan untuk merancang sistem kendali inner loop berupa Stability Augmented System guna meningkatkan redaman pada mode short period melaui pitch damper dan mode dutch roll melalui yaw damper dan roll damper serta dilanjutkan dengan dilakukannya penggabungan pada ketiga sumbu kendali yaitu sumbu longitudinal, lateral – directional dengan tujuan memastian tidak adanya degradasi antar kanal pesawat. Pemodelan matematis disusun dalam model linear small perturbation pada kondisi trim dengan ketinggian 15.000 ft dan kecepatan 232 KEAS, yang dilanjutkan dengan validasi model matematis terhadap data pesawat DHC-5 Buffalo dengan eror dibawah 5%. Simulasi dilakukan dengan menggunakan software MATLAB/Simulink. Hasil simulasi menunjukan bahwa pitch damper dengan gain sebesar -0.543266 dapat meningkatkan rasio redaman dari mode short period yang ditunjukan oleh nilai ζ sebesar 0,42778 menjadi ζ sebesar 0,736, sedangkan pada yaw damper dengan nilai gain sebesar 2.9164 dan roll damper dengan nilai gain sebesar 0,40916 dapat meningkatkan rasio redaman pada mode dutch roll ditunjukan oleh nilai ζ sebesar 0,229 menjadi ζ sebesar 0,59 yang menempatkan seluruh parameter kualitas terbang pada posisi yang lebih baik di dalam rentang Level 1 Kategori B yang sebelumnya sudah terpenuhi. Pada akhir analisis dalam penggabungan sistem kendali inner loop tidak ditemukannya degradasi antar kanal.
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Flight safety depends heavily on aircraft stability. This stability is inseparable from the aircraft's behavior, which exhibits reaction patterns as modes in its longitudinal and lateral-directional motions. This research aims to design an inner-loop control system in the form of a Stability Augmentation System (SAS) to improve the damping of the short-period mode using a pitch damper, and the Dutch roll mode using yaw and roll dampers. Furthermore, the control axes longitudinal and lateral-directional were integrated to ensure that no inter-channel degradation occurred within the aircraft.The mathematical modeling was formulated using a linear small-perturbation model under trim conditions at an altitude of 15,000 ft and an airspeed of 232 KEAS. This was followed by validating the mathematical model against DHC-5 Buffalo aircraft data, yielding an error margin of less than 5%. The simulations were conducted using MATLAB/Simulink software.The simulation results demonstrate that a pitch damper with a gain of -0.543266 can increase the damping ratio of the short-period mode from ζ is 0.42778 to ζ is 0.736. Meanwhile, a yaw damper with a gain of 2.9164 and a roll damper with a gain of 0.40916 can increase the damping ratio of the Dutch roll mode from ζ is 0.229 to ζ is 0.59. This places all flying quality parameters in a more optimal position within the previously fulfilled Level 1 Category B range. Finally, the analysis of the integrated inner loop control system revealed no inter channel degradation.

Item Type: Thesis (Other)
Uncontrolled Keywords: Inner Loop, Stability Augmentation System, Short Period, Dutch Roll
Subjects: Q Science > QA Mathematics > QA401 Mathematical models.
Q Science > QA Mathematics > QA402 System analysis.
T Technology > T Technology (General) > T57.62 Simulation
T Technology > TJ Mechanical engineering and machinery > TJ213 Automatic control.
Divisions: Faculty of Industrial Technology > Physics Engineering > 30201-(S1) Undergraduate Thesis
Depositing User: Chania Az-zahra Adiani
Date Deposited: 31 Jul 2026 15:24
Last Modified: 31 Jul 2026 15:24
URI: http://repository.its.ac.id/id/eprint/142018

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