4.4 Mechanism Design and Verification of Lunar Lander
135
Table 4.4 (continued)
Requirements
Definition
Description
Information required
Mechanical interface Satisfaction with the
structure, the lunar
rover, various parts,
and the mechanical
mating, connection
and movement
envelope with other
sub-systems
1) Requirements for
interfaces with
structures included:
mounting surface
accuracy and
connection point
position
2) Requirements for
the interface with
the lunar rover
included: the
accuracy of
connection points,
the configuration
and size of the
mating surface
3) Requirements for
interfaces between
components
included:
connection form
between the
components, the
accuracy, and the
enveloping during
unfolding, folding
and movement
Requirements of
mechanical interface
Mass
The total mass
should be less than
specific value
The initial allocation
might be adjusted
according to the detail
design results
Mass allocated
Bearing requirements Under the impact of
the lunar rover load,
the structure of the
lunar rover
separation
mechanism should
not be damaged
For the lunar rover of
allocated mass, the
separation mechanism
under external dynamic
load and landing
impact load conditions
should ensure a reliable
connection between the
lunar rover and the
lander
1) Quasi-static
qualification load
for launch and
landing
2) Mass of the lunar
rover
Through above analysis, it showed that the key points for design of the lunar rover
separation mechanism of the Chang’E-3 lunar lander were:
(1) The structure of the lunar rover separation mechanism should withstand the
launch and landing mechanical loads, and the structural strength should meet
the requirements for use;