Abstract
This paper presents the development of a rotorcraft conceptual design tool able to incorporate handling qualities assessment at an early design stage. After a first conventional sizing, performed utilizing NASA’s NDARC software, a linearized model of the rotorcraft flight mechanics is built. The linear model is augmented by a simplified control system, designed according to structured H_{infty } techniques, to determine augmentation requirements, rather than design the actual flight control system. ADS-33 Bandwidth and Phase-Delay standards are exploited to objectively assess the handling qualities of the current design and to drive an iterative redesign process aimed at enhancing the handling qualities ratings. The rotorcraft parameters resulting from the augmented sizing are subsequently used to automatically generate a real-time capable multibody model, which can be used for the subjective evaluation of its handling qualities via piloted flight simulation. The tool capabilities are demonstrated by designing a conventional lightweight helicopter of the class of the Airbus Helicopters BO105.
Highlights
The conceptual design of rotorcraft, often referred to as sizing, usually addresses desired performances in terms of the capability to fulfill given missions and tasks
handling qualities (HQs) are the net result of multiple design choices related to layout, structural, aerodynamic and control (FCS architecture and design) parameters that might not even be available during the conceptual design stage
After years of dedicated research, there is currently no reason for Handling Qualities not to be included in the early design process of rotorcraft
Summary
The conceptual design of rotorcraft, often referred to as sizing, usually addresses desired performances in terms of the capability to fulfill given missions and tasks At this design stage, not enough details are available to assess other fundamental properties of the rotorcraft. HQs are the net result of multiple design choices related to layout, structural ( inertial), aerodynamic and control (FCS architecture and design) parameters that might not even be available during the conceptual design stage. For this reason, their early evaluation and incorporation in the design process can be a rather challenging task
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
