480
14 Electrical Testing Technology of Lunar Lander
Unit 1:
Status setting
before launch
Begin
Switch to next?
Unit 2
Switch to next?
Unit 15
Unit 16
End
Yes
Yes
No
No
Fig. 14.6 Test process of unit test
Table 14.6 Flight simulation test for powered descent phase
System test phase Test content
Phase B
Flight simulation test for GNC subsystem in powered descent
Phase C
Primary and back flight simulation test for all mission phases with the lunar
lander
Complex test
Primary and back flight simulation test for all mission phases with the
complex
EMC test
Primary and back flight simulation test for all mission phases with the
complex
Thermal test
Flight simulation test for powered descent with the lunar lander
Test at launch site Primary and back flight simulation test for all mission phases with the
complex
14.6.3 Flight Simulation Test for Powered Descent Phase
One of the key processes of the Chang’E-3 lunar lander was the powered descent,
which should be tested for many times at different phases of electrical test, as shown
in Table 14.6.
In order to implement the flight simulation test for powered descent, several kinds
of sensor simulators should be developed, including echo simulator, laser ranging
simulator, optical simulator and etc. These simulators would simulate signals of
microwave, distance signal and image stimulation, so that the GNC central control
unite of the lunar lander could automatically complete adjusting, approaching,
hovering, obstacle avoidance, slow descending and other activities according to these
inputs, and finally be softly landed on lunar surface. In addition, test procedures and
commands of flight simulations test were compiled strictly with the time sequence
according to the flight procedures on orbit. The test equipment configuration for
flight simulation test for powered descent is shown in Fig. 14.7.
14 Electrical Testing Technology of Lunar Lander
Unit 1:
Status setting
before launch
Begin
Switch to next?
Unit 2
Switch to next?
Unit 15
Unit 16
End
Yes
Yes
No
No
Fig. 14.6 Test process of unit test
Table 14.6 Flight simulation test for powered descent phase
System test phase Test content
Phase B
Flight simulation test for GNC subsystem in powered descent
Phase C
Primary and back flight simulation test for all mission phases with the lunar
lander
Complex test
Primary and back flight simulation test for all mission phases with the
complex
EMC test
Primary and back flight simulation test for all mission phases with the
complex
Thermal test
Flight simulation test for powered descent with the lunar lander
Test at launch site Primary and back flight simulation test for all mission phases with the
complex
14.6.3 Flight Simulation Test for Powered Descent Phase
One of the key processes of the Chang’E-3 lunar lander was the powered descent,
which should be tested for many times at different phases of electrical test, as shown
in Table 14.6.
In order to implement the flight simulation test for powered descent, several kinds
of sensor simulators should be developed, including echo simulator, laser ranging
simulator, optical simulator and etc. These simulators would simulate signals of
microwave, distance signal and image stimulation, so that the GNC central control
unite of the lunar lander could automatically complete adjusting, approaching,
hovering, obstacle avoidance, slow descending and other activities according to these
inputs, and finally be softly landed on lunar surface. In addition, test procedures and
commands of flight simulations test were compiled strictly with the time sequence
according to the flight procedures on orbit. The test equipment configuration for
flight simulation test for powered descent is shown in Fig. 14.7.