USA flag logo/image

An Official Website of the United States Government

Polar Woven Flywheel Resin Film Infiltrated

Award Information

Department of Defense
Air Force
Award ID:
Program Year/Program:
1998 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Applied Material Technologies, Inc.
2302 S. Fairview Street Santa Ana, CA 92704 0493
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 1998
Title: Polar Woven Flywheel Resin Film Infiltrated
Agency / Branch: DOD / USAF
Contract: N/A
Award Amount: $99,085.00


This Small Business Innovation Research (SBIR) project will develop a low-cost resin film infusion approach to fabricating a polar woven (hoop and radial direction reinforced), lightweight composite material rotor for flywheel energy storage (FES) systems. The application of this device will be for an integrated replacement of chemical batteries and attitude control actuators in spacecraft. The tasks of design, fabrication, and testing of a FES advanced rotor design for energy storage with combined attitude control system (ACS) involves many challenges. High priority design issues are long term durability (fatigue life), dynamic stability (balance), and fail-safe operation. Foremost, long-term durability must be adequately accommodated, failure to do so will lead to dynamic on-board disturbances (self-emitted vibrations) and non-safe operating conditions. During an anticipated ten year service, a Low Earth Orbit (LEO) communication satellite is expected to undergo 50,000 cycles (charge/discharge) while supplying 3 to 5 kW-hr of usable energy. The depth-of-discharge of a mechanical (flywheel) energy storage is up towards 90%. Such a high number of cycles and depth-of-discharge presents a major concern for fatigue failure, especially due to radial stresses where the stress and strain capability of a composite material is limited. A polar woven architecture offers radial stiffness and strength support to the rotor design compared to a uni-directional all-hoop winding architecture.

Principal Investigator:

Sung S. Suh

Business Contact:

Small Business Information at Submission:

Applied Material
3611 South Harbor Blvd. Santa Ana, CA 92704

Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No