1、Lessons Learned Entry: 1863Lesson Info:a71 Lesson Number: 1863a71 Submitting Organization: GRCa71 Submitted by: Dale Forcea71 POC Name: Dale Forcea71 POC Email: Dale.A.Forcenasa.gova71 POC Phone: 216-433-3520Subject: Model Based Design reduces hardware prototyping Abstract: By using computer models
2、of the traveling wave tube (TWT) and electronic power conditioner (EPC), the Lunar Reconnaissance Orbiter (LRO) traveling wave tube amplifier (TWTA) achieved first pass success.Description of Driving Event: NASA Glenn Research Center was a pioneer in the computer aided design of TWTs, and successful
3、ly transferred the technology to the commercial TWT industry and to DOD. The use of computer modeling allowed the LRO TWTA program to obtain two space qualified TWTAs with two TWT builds. In the Communication Technology Satellite program, done before any computer modeling was introduced, 32 builds w
4、ere needed before a successful TWTA was obtained.Lesson(s) Learned: Model Based Design allows first pass design success, saving time and money in obtaining hardware for NASA missions.Recommendation(s): Where computer models of hardware are available, they should be used in the design process. Where
5、they are not, development of such models is desirable.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Evidence of Recurrence Control Effectiveness: In developing the Ka-band TWT for the Cassini mission to Saturn, with computer modeling of TWTs in its
6、 infancy, the number of builds needed to produce a successful TWT was reduced to eight (from 32 with no computer modeling). With the current state of computer modeling, the first build was successful.Documents Related to Lesson: N/AMission Directorate(s): a71 Space Operationsa71 Sciencea71 Explorati
7、on Systemsa71 Aeronautics ResearchAdditional Key Phrase(s): a71 Engineering Design (Phase C/D).Spacecraft and Spacecraft InstrumentsAdditional Info: a71 Project: Lunar Reconnaissance Orbiter TWTAApproval Info: a71 Approval Date: 2008-09-26a71 Approval Name: mbella71 Approval Organization: HQProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
