14.6 Electrical Testing Methodology
479
14.6.2 Flight Simulation Test for All Mission Phases
The ground flight simulation test design was as complex as mission profile of the
Chang’E-3 lunar lander, including different modes such as LTO and powered descent
in complex status with the lunar rover, release and separation on lunar surface, operation on lunar surface and etc. For both single probe test and all mission phases
test in complex status, modularized design idea was applied. The flight procedure
was classified into different units, which were designed separately with different test
procedures and sequence. When the test was implemented, test units were combined
according to test requirements to form test cases in order to improve the reuse level
of test cases and the efficiency of test design.
For example, in the flight simulation test before release and separation process on
lunar surface of Change’E-3 lunar lander, there were 16 units as listed in Table 14.5.
The unit test process is shown in Fig. 14.6. After one test unit was accomplished, it
could be chosen to enter the next unit or finish the test after the status recovery. The
modularized design could greatly improve the flexibility of test management and the
efficiency of test implementation.
Table 14.5 Electrical test content of the lunar rover
Unit no Test content
Unit 1 Status setting before launch
Unit 2 Flight simulation test for launch phase
Unit 3 Flight simulation test of Trajectory Maneuver Correction (TCM)-1
Unit 4 Flight simulation test of TCM-3
Unit 5 Flight simulation test for Lunar Orbit Insertion
Unit 6 Flight simulation test for orbit change in 100 km × 15 km LLO
Unit 7 Flight simulation test for powered descent phase
Unit 8 Flight simulation test for initialization after landing
Unit 9 Flight simulation test for unlocking of directional antenna, transfer mechanism and the
rover wheel
Unit 10 Flight simulation test for first camera imaging
Unit 11 Flight simulation test for antenna deployment and data transmission
Unit 12 Flight simulation test for propellant depletion
Unit 13 Flight simulation test for data playback
Unit 14 Flight simulation test for propulsion subsystem power-off and gas vent
Unit 15 Flight simulation test for TT&C after GNC power-off
Unit 16 Status recovery
479
14.6.2 Flight Simulation Test for All Mission Phases
The ground flight simulation test design was as complex as mission profile of the
Chang’E-3 lunar lander, including different modes such as LTO and powered descent
in complex status with the lunar rover, release and separation on lunar surface, operation on lunar surface and etc. For both single probe test and all mission phases
test in complex status, modularized design idea was applied. The flight procedure
was classified into different units, which were designed separately with different test
procedures and sequence. When the test was implemented, test units were combined
according to test requirements to form test cases in order to improve the reuse level
of test cases and the efficiency of test design.
For example, in the flight simulation test before release and separation process on
lunar surface of Change’E-3 lunar lander, there were 16 units as listed in Table 14.5.
The unit test process is shown in Fig. 14.6. After one test unit was accomplished, it
could be chosen to enter the next unit or finish the test after the status recovery. The
modularized design could greatly improve the flexibility of test management and the
efficiency of test implementation.
Table 14.5 Electrical test content of the lunar rover
Unit no Test content
Unit 1 Status setting before launch
Unit 2 Flight simulation test for launch phase
Unit 3 Flight simulation test of Trajectory Maneuver Correction (TCM)-1
Unit 4 Flight simulation test of TCM-3
Unit 5 Flight simulation test for Lunar Orbit Insertion
Unit 6 Flight simulation test for orbit change in 100 km × 15 km LLO
Unit 7 Flight simulation test for powered descent phase
Unit 8 Flight simulation test for initialization after landing
Unit 9 Flight simulation test for unlocking of directional antenna, transfer mechanism and the
rover wheel
Unit 10 Flight simulation test for first camera imaging
Unit 11 Flight simulation test for antenna deployment and data transmission
Unit 12 Flight simulation test for propellant depletion
Unit 13 Flight simulation test for data playback
Unit 14 Flight simulation test for propulsion subsystem power-off and gas vent
Unit 15 Flight simulation test for TT&C after GNC power-off
Unit 16 Status recovery