Innovative Rotorcraft Control for Shipboard Operations

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N68335-08-C-0411
Agency Tracking Number: N071-031-0775
Amount: $248,932.00
Phase: Phase II
Program: SBIR
Awards Year: 2008
Solicitation Year: 2007
Solicitation Topic Code: N07-031
Solicitation Number: 2007.1
Small Business Information
1410 Sachem Place, Suite 202, Charlottesville, VA, 22901
DUNS: 120839477
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 John Schierman
 Principal Research Scient
 (434) 973-1215
Business Contact
 Connie Hoover
Title: General Manager
Phone: (434) 973-1215
Research Institution
A prototype adaptive flight control concept was developed in Phase I which better compensates for dis-turbances on the rotorcraft due to ship airwake effects and the moving ship deck during helicopter or tiltrotor shipboard operations. It is proposed to further mature the algorithms associated with this control approach in a limited-scope Phase II program. A parameter identification algorithm and an on-line learning approach will be further matured to deliver in-flight estimates of important effects of the ship airwake and ship motion. The system identifies both the statistical properties of the apparently random characteristics of the airwake as well as the repeatable and deterministic disturbances of the airwake due to the ship’s geometry and motion. The Phase I flight controller was designed to use the information from the on-line identification/learning algorithms to improve disturbance rejection properties of the aircraft. The system provides enhanced feedback compensation to improve rejection of disturbances due to random airwake forces impinging on the vehicle, and feed-forward compensation to help compensate for deterministic airwake disturbances. We will focus application on a tilt-rotor UAV model. However, the flight controller could also be applied to manned rotorcraft.

* Information listed above is at the time of submission. *

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