USA flag logo/image

An Official Website of the United States Government

Vibration Reduction Methods and Techniques for Rotorcraft Utilizing On-Blade…

Award Information

National Aeronautics and Space Administration
Award ID:
Program Year/Program:
2007 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Techno-Sciences, Inc.
11750 Beltsville Drive 3rd Floor Beltsville, MD -
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 2007
Title: Vibration Reduction Methods and Techniques for Rotorcraft Utilizing On-Blade Active Control
Agency: NASA
Contract: NNX07CA09P
Award Amount: $100,000.00


Rotor blades adapted for vibration control have the added benefit of extended blade and rotor life, as well as improved passenger comfort. Approaches that have been explored for on-blade active control or individual blade control include control surface actuation, such as trailing edge flaps, and integrated blade manipulation, such as controllable twist. For retro-fit and upgrade purposes, the advanced rotor system needs an actuation scheme with appropriate force, deflection, and bandwidth, without detrimentally increasing on-blade mass. Research in this area has been conducted with potential solutions employing various conventional active material actuator configurations, but these systems have typically suffered from inherent disadvantages. Due to these limitations, Techno-Sciences, Inc. proposes the use of pneumatic artificial muscles to actuate a trailing edge flap device for management of rotorcraft vibration. The proposed actuators are constructed of passive materials that are very mass efficient and low cost, while maintaining adequate force, stroke, and bandwidth. Oriented along the blade span and located within the airfoil contour near the blade root, the antagonistic configuration of actuators offers bi-directional flap deflection and operation under a low centrifugal field. A lightweight mechanism accompanies the actuators, running along the span, to transfer and tailor the mechanical work from the actuators to the span station of the flap. The proposed research plan will work to properly size and scale the actuators and mechanism for the desired response, and construct a prototype device that demonstrates the feasibility of the concept on the bench-top and in a rotating environment at full-scale loading.

Principal Investigator:

Curt R. Kothera
Principal Investigator

Business Contact:

Amy A. Hizoune
Business Official
Small Business Information at Submission:

Techno-Sciences, Inc.
11750 Beltsville Drive, Suite 300 Beltsville, MD 20705

EIN/Tax ID: 952954785
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No