NASA SBIR 2007 Solicitation


PROPOSAL NUMBER: 07-2 O1.03-9524
SUBTOPIC TITLE: Communication for Space-Based Range
PROPOSAL TITLE: Single-Aperture GPS-based Attitude (GPS/A) Sensor for Spin-Stabilized Platforms

SMALL BUSINESS CONCERN (Firm Name, Mail Address, City/State/Zip, Phone)
Toyon Research Corporation
6800 Cortona Drive
Goleta, CA 93117 - 3021
(805) 968-6787

PRINCIPAL INVESTIGATOR/PROJECT MANAGER (Name, E-mail, Mail Address, City/State/Zip, Phone)
Kenan O. Ezal
6800 Cortona Drive
Goleta, CA 93117 - 3021
(805) 968-6787

Expected Technology Readiness Level (TRL) upon completion of contract: 6 to 7

TECHNICAL ABSTRACT (Limit 2000 characters, approximately 200 words)
Attitude determination of spin-stabilized platforms is especially challenging. Current low-cost gyroscope technology does not lend itself to attitude determination of platforms spinning in excess of one rotation per second. Traditional GPS-based attitude (GPS/A) sensors require three or more antenna elements separated by large baselines. Single-element designs require extensive calibration of the satellite signal-to-noise ratio (SNR) and are not very accurate. Toyon Research Corporation proposes to develop a small, single-aperture low-cost GPS/A sensor for space launch vehicles, and to demonstrate the sensor in an operational environment. The sensor determines the platform attitude with a single GPS antenna having a diameter of approximately 6.5 cm. The standalone performance of Toyon's GPS/A sensor on a spinning platform is better than 2.1 degrees for roll, and better than 1.2 degrees for yaw and pitch (one-sigma). The system performance can be further improved when integrated with accelerometers and/or magnetometers. Although current low-cost gyroscope technology does not allow their use on spinning platforms, non-spinning platforms may take advantage of gyro measurements for further improvements in attitude performance. During the proposed Phase II program Toyon will develop, build and test a prototype system that will be delivered for validation onboard an actual space launch vehicle.

POTENTIAL NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
Toyon's Miniature Integrated Direction-finding Attitude-determining Anti-jam System (MIDAAS(TM)) provides drift-free and temperature insensitive GPS-based attitude (GPS/A) measurements for small expendable launch vehicles and micro-satellites in a small package and at a lower cost than array-based GPS attitude systems. The stand-alone MIDAAS sensor performs equally well for spinning and non-spinning platforms, and can be integrated with alternative sensors such as accelerometers, magnetometers, and gyroscopes, when feasible. The MIDAAS technology has direct applications to any navigation system requiring 3-D attitude measurements including manned and unmanned vehicles and robots. When feasible, the integration of low-cost gyroscopes results in a ten-fold improvement in navigation accuracy without significant increases in cost: the MIDAAS sensor provides tactical-grade performance when integrated with a commercial-grade inertial measurement unit (IMU).

POTENTIAL NON-NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
The MIDAAS GPS-based attitude (GPS/A) sensor technology is applicable to a wide range of military and civilian applications including unmanned aerial vehicles (UAVs), micro air vehicles (MAVs), unattended ground sensors (UGS), handheld positioning units, recreational and military virtual- and mixed-reality orientation devices, radio-controlled (RC) vehicles, ground vehicles, and far-target locators, as well as military spin-stabilized munitions and platforms. The technology appeals to customers who desire robust position and attitude measurements for spinning and non-spinning platforms that have stringent cost and size, weight and power (SWAP) constraints.

NASA's technology taxonomy has been developed by the SBIR-STTR program to disseminate awareness of proposed and awarded R/R&D in the agency. It is a listing of over 100 technologies, sorted into broad categories, of interest to NASA.

Attitude Determination and Control
Guidance, Navigation, and Control
Integrated Robotic Concepts and Systems
Telemetry, Tracking and Control

Form Generated on 10-23-08 13:36