412
12 Integration and Assembly Technology of Lunar Lander
12.4.4 Design of Technical Process Flow
Technical process flow is the baseline of system integration and assembly. The efficiency and quality of manufacture management is directly decided by the design
of technical process flow [13]. Because in the development of the Chang’E-3 lunar
lander, there were great technical challenge, parallel development of multiple models,
a large number of technological equipment and a lot of special validation tests, it
was very important to design and optimize the technological process flow of system
integration and assembly.
The technological process flow is the program for all work assigned in time
during the process of system integration and assembly. It is generally described
in a flowchart diagram and detail description in a table, including classification of
spacecraft development phases, the tasks and work in each phase, as well as the
sequence and relation between them [14]. The technical process flow of the system
integration and assembly of the Chang’E-3 lunar lander is shown in Fig. 12.6. In the
technical process flow, there should be detail description for each block, including
support conditions, details of work, cautions, involved partners and completion time.
In the design of technical process flow of the lunar lander, attention should be
paid to follows according to characteristics of spacecraft development.
(1) Stabilization and dynamic adjustment of the baseline of technical process
flow. The technical process flow was the control baseline for system integration and
assembly of the lunar lander. The stability of the technical process flow was helpful to
smooth management of the development of the lunar lander. However, because of the
complexity of the lunar lander, it was inevitable to adjust dynamically the technical
process flow. Therefore, it was necessary to pay attention in time to the impact
of dynamic adjustment of the technical process flow on technological equipment
resources, facility resources and hardware status, so as to avoid resource conflicts
through process optimization and separation between mainstream and auxiliary, as
well as control the hardware implementation status effectively through control tables,
key inspection points and key process controls.
Rehearsal
in launch
site
Modification
for rehearsal
Shipment
Transportation
Structure
assembly
Propulsion
assembly
Alignment test
and leak examine
Instrument
assembly
Cable
assembly
Structure
assembly
Structure
decomposition
Thermal control
unit assembly
Module
assembly
Mechanism
assembly and
test
Mechanical
test
Solar panel
deployment
test
Antenna
deployment
test
Landing
impact test
Thermal
control unit
assembly
Thermal
balance test
Separation
and release
test
Fig. 12.6 Technical process flow of system integration and assembly of the Chang’E-3 lunar lander
in phase B
12 Integration and Assembly Technology of Lunar Lander
12.4.4 Design of Technical Process Flow
Technical process flow is the baseline of system integration and assembly. The efficiency and quality of manufacture management is directly decided by the design
of technical process flow [13]. Because in the development of the Chang’E-3 lunar
lander, there were great technical challenge, parallel development of multiple models,
a large number of technological equipment and a lot of special validation tests, it
was very important to design and optimize the technological process flow of system
integration and assembly.
The technological process flow is the program for all work assigned in time
during the process of system integration and assembly. It is generally described
in a flowchart diagram and detail description in a table, including classification of
spacecraft development phases, the tasks and work in each phase, as well as the
sequence and relation between them [14]. The technical process flow of the system
integration and assembly of the Chang’E-3 lunar lander is shown in Fig. 12.6. In the
technical process flow, there should be detail description for each block, including
support conditions, details of work, cautions, involved partners and completion time.
In the design of technical process flow of the lunar lander, attention should be
paid to follows according to characteristics of spacecraft development.
(1) Stabilization and dynamic adjustment of the baseline of technical process
flow. The technical process flow was the control baseline for system integration and
assembly of the lunar lander. The stability of the technical process flow was helpful to
smooth management of the development of the lunar lander. However, because of the
complexity of the lunar lander, it was inevitable to adjust dynamically the technical
process flow. Therefore, it was necessary to pay attention in time to the impact
of dynamic adjustment of the technical process flow on technological equipment
resources, facility resources and hardware status, so as to avoid resource conflicts
through process optimization and separation between mainstream and auxiliary, as
well as control the hardware implementation status effectively through control tables,
key inspection points and key process controls.
Rehearsal
in launch
site
Modification
for rehearsal
Shipment
Transportation
Structure
assembly
Propulsion
assembly
Alignment test
and leak examine
Instrument
assembly
Cable
assembly
Structure
assembly
Structure
decomposition
Thermal control
unit assembly
Module
assembly
Mechanism
assembly and
test
Mechanical
test
Solar panel
deployment
test
Antenna
deployment
test
Landing
impact test
Thermal
control unit
assembly
Thermal
balance test
Separation
and release
test
Fig. 12.6 Technical process flow of system integration and assembly of the Chang’E-3 lunar lander
in phase B