GPIM AF-M315E Propulsion System
The NASA Space Technology mission Directorate's (STMD) Green Propellant Infusion Mission (GPIM) Technology Demonstration Mission (TDM) will demonstrate an operational AF-M315E green propellant propulsion system. Aerojet-Rocketdyne is responsible for the development of the propulsion system payload. This paper statuses the propulsion system module development, including thruster design and system design; Initial test results for the 1N engineering model thruster are presented. The culmination of this program will be high-performance, green AF-M315E propulsion system technology at TRL 7+, with components demonstrated to TRL 9, ready for direct infusion to a wide range of applications for the space user community.
Green Propellant Infusion Mission (GPIM) space vehicle integration and test status
The Green Propellant Infusion Mission (GPIM) Project is sponsored by the NASA Space Technology Mission Directorate as part of the work conducted by the Technology Demonstration Mission Program Office. The goal of GPIM is to advance the technology readiness level (TRL) of a green propulsion technology based on the monopropellant AF-M315E via flight demonstration. As the Project lead, Ball Aerospace & Technologies Corp. (Ball) is coordinating contributions from industry, NASA, and the U.S. Air Force to execute the GPIM project. The GPIM Project started in October 2012. The SV bus was integrated and ready for payloads on schedule 23 months after contract start (September 2014). Work on the bus went into a `bathtub' period to accommodate delays in payload arrival. In May 2014, post PDR, the GPIM Project was authorized to integrate three Air Force SERB payloads onto the GPIM space vehicle: iMESA, SWATS and SOS. These payloads were successfully integrated in June 2015. The Green Propellant Propulsion System (GPPS) arrived at Ball for integration in August 2015. SV integration and environmental testing has been successfully completed. The SV is in storage in a `bathtub' period while waiting shipment to the launch site. This paper summarizes the flexibility of the BCP-100 spacecraft and describes the work to integrate the payloads and go through SV environmental testing.
Representation of systems disturbed by wide band noise
In this paper, a method of handling and working with wide band noise is developed. We represent wide band noise as a distributed delay of white noise and use it to reduce a nonlinear system disturbed by wide band noise to a nonlinear system disturbed by white noise. An application of this reduction to a nonlinear filtering problem under a wide band noise disturbance is discussed.