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Tiltrotor Conversion Maneuver Analysis with RCAS

Hyeonsoo Yeo, US Army CCDC AvMC
Hossein Saberi, Advanced Rotorcraft Technology Inc.

October 10, 2020

https://doi.org/10.4050/F-0076-2020-16437

Abstract:
Aeromechanics analysis is performed using the comprehensive analysis code RCAS (Rotorcraft Comprehensive Analysis System) to study the transient conversion maneuver of a tiltrotor. The analytical model is based on the XV-15 research tiltrotor aircraft in size and dynamic characteristics. A generic (not representative of XV-15) tiltrotor control system is developed to simulate conversion maneuver. Hover and cruise performance of the present XV-15 analytical model is validated against available test data. The conversion calculation begins with a trim analysis at hover, which is followed by the conversion maneuver. During the maneuver analysis, the pilot control model is activated to fly the aircraft following a desired airspeed profile and minimum altitude change. Time histories of vehicle dynamics, rotor controls, rotor flapping, rotor performance and blade structural loads are investigated for various transient conversion maneuvers. The aircraft acceleration during the transient maneuver has a significant influence on the rotor performance and loads.


Tiltrotor Conversion Maneuver Analysis with RCAS

  • Presented at Forum 76 - Best Paper for this session
  • 22 pages
  • SKU # : F-0076-2020-16437
  • Your Price : $30.00
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Tiltrotor Conversion Maneuver Analysis with RCAS

Authors / Details: Hyeonsoo Yeo, US Army CCDC AvMC
Hossein Saberi, Advanced Rotorcraft Technology Inc.