Today we hear a lot about space-relatedQT or AT-level testing." Here is a note about the
What are QT and AT levels?
QT = Qualifying Test
English: Qualification Test
Meaning:certification examination(Common: Often referred to as QT-level exams)
summary
Tests conducted on PM (prototype).
The prototype model is manufactured using the same design and manufacturing methods as the FM (flight model), but is subjected to more stringent test conditions than the acceptance test (AT-level test) of the flight model to certify the design and manufacturing methods.
QT-level testing is conducted by setting conditions that are harsher than those in the actual environment to expose latent defects, and confirming that the required functional performance is satisfied by a sufficient margin in QT-level testing, even when exposed to the actual environment.
AT = Acceptance Test
English: Acceptance Test
Meaning:acceptance test(Common: Often referred to as AT-level exams)
summary
AT (Acceptance Test) is performed on FM (Flight Model).
The purpose of AT (Acceptance Test) is to reveal defects, etc. in FM (Flight Model) manufactured with the design and manufacturing methods approved in QT (Qualification Test).
Difference between QT level and AT level
Vibration test: 1.5 times the actual load,
Acoustic test : +4db
Thermal vacuum test: ±15°C wide temperature
Supplement (PM/FM/PFM)
PM (Prototype Model)
The system is created using the actual equipment and systems that will be used in the actual operation,This model is tested under more severe environmental conditions than actual flight conditions.
FM (Flight Model)
Actual operationEquipments and Systems
PFM (proto-flight model)
Development for efficiency,FM (flight model) that corresponds to the PM (ptotype model), which has completed QT testing, with the necessary parts.
Perform AT (Acceptance Test) and use as actual equipmentDo.
That's it.