8.5 Testing and Verification of Propulsion Subsystem
295
Table 8.5 Test items for propulsion subsystem of the Chang’E-3 lunar lander
Test item
Test content
Note
Component Modular Subsystem System
Insulation test
Insulation resistance of
detonator, solenoid
valve, latch valve,
stepping motor coil and
pressure sensor
√
√
√
√
Electric current of
solenoid, latch
valve
Opening/shutdown
response performance
for solenoid valve, latch
valve
√
√
√
√
Regulator
adjusting
Pressure, flux
performance
√
–
–
–
Engine/thruster
cold flow test
Flow resistance of
7500 N engine and
150 N, 10 N thruster
√
–
–
–
Pipeline cold flow
test
Flow resistance
matching of orbit
control engine
√
–
–
–
Helium leak test
Leakage rate of each
component, modular,
subsystem
√
√
√
√
Relief valve
opening/shutdown
pressure test
Opening/shutdown
pressure characteristics
√
–
–
–
Electronic unit test Function, interface,
software and control of
electronics
√
√
√
√
Installation
accuracy test
Nozzle geometry
accuracy of 7500 N
engine and 150 N, 10 N
thruster
√
√
√
√
Polarity test
Polarity for
orbit/attitude control
engine, latch valve,
stepping motor, limit
switch, pressure sensor,
pipeline connection
√
√
√
√
Flight simulation
test
The correctness of
telemetry, command
interface, software,
flight procedure
–
–
–
√
Engine/thruster
batch sampling hot
firing
Validation of
engine/thruster
performance
√
–
–
–
(continued)