1、Lessons Learned Entry: 0194Lesson Info:a71 Lesson Number: 0194a71 Lesson Date: 1992-11-04a71 Submitting Organization: KSCa71 Submitted by: David PenningtonSubject: Space Shuttle Automatic Landing Capabilities. Description of Driving Event: The space shuttle system presently includes an autoland syst
2、em that provides automated guidance capable of navigating the orbiter to the selected landing runway.The increased duration of space shuttle flights as part of the extended duration orbiter program (EDO) has raised the issue of the need to qualify the existing system during actual flights. It also r
3、aises the issue of the possible need to fully automate all landing, rollout, and braking functions so that the orbiter could be returned safely from orbit without any crew intervention, if necessary.The existing automated approach guidance system never has been fully flight tested. The second space
4、shuttle flight, STS-2, left the auto mode engaged until the latter part of the team region and demonstrated that the system was capable of returning the vehicle to a flyable energy state from a low energy state. STS-3 left the system in auto until the commanders scheduled takeover at 125 feet. The s
5、ystem was on energy and trajectory at takeover, but the pilot had difficulty getting “into the loop,“ and an uncomfortable situation developed. The final several thousand feet of the shuttles descent involves relatively complex flare maneuvers with which a pilot might be expected to have difficulty
6、when retaking command.Lesson(s) Learned: Significant risk reduction will result if the space shuttles automatic landing capabilities are fully developed and certified for operational use.Recommendation(s): Develop a detailed test of the automatic landing system that will include all functions throug
7、h Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-touchdown and rollout to wheel stop.Evidence of Recurrence Control Effectiveness: N/ADocuments Related to Lesson: N/AMission Directorate(s): a71 Space Operationsa71 Exploration SystemsAdditional Key P
8、hrase(s): a71 Flight Operationsa71 Flight Equipmenta71 Human FactorsAdditional Info: Approval Info: a71 Approval Date: 1994-06-06a71 Approval Name: James G. Klinea71 Approval Organization: SC/HEIa71 Approval Phone Number: 407-867-7614Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
