12.4 Design of System Integration and Assembly
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process of the lunar lander would not be affected by lack of technological equipment.
The technological equipment to be planned included hanger, parking trolley, transfer
container, product turnover equipment, special test equipment, and ground special
test equipment.
In the phase B (preliminary design and technology completion) of the Chang’E3 lunar lander development, there were electrical model, structural model, thermal
model and model for landing validation of the lunar lander developed, while electrical
model, structural model and thermal model were developed in parallel. Therefore,
when the technological equipment was planned, it should be planned according to the
technical process flow. The types and quantities of technological equipment should
be determined as well as the usage status.
12.4.3 Planning of Process Test
The planning of process tests was for the specific planning and analysis of the process
verification, process test and process research involved in the design of systematic
assembly process. The objective was to analyze the completeness of process tests,
the approach of process tests, the support of process tests and the relevance with
process flow.
Generally, there were simulated assembly test, digital simulation test and process
parameters verification tests in assembly process tests. The simulated assembly test
was conducted when the product constraints during assembly process could not be
clearly defined, the assembly process flow was not determined, and it was difficult to
conduct man-machine performance evaluation in virtual environment. In the simulated assembly test, the wood product model would be manufactured according to
actual product conditions and constraints, so as to build a real assembly environment. Then the corresponding assembly operation was carried out to find the defects
of assembly process methods and assembly tools to establish feasible assembly plan
and process flow. The advantages of simulated assembly test included full process
validation, good for practice and process training in advance. Nevertheless, the disadvantages included long term of test preparation and difficulties in constraint change.
In the assembly digital simulation test, the three-dimensional model of product could
be applied to virtually evaluate operation accessibility, product interface compatibility and human-machine ergonomics in virtual reality environment. The characteristics of assembly digital simulation test were convenient to verify and change
constraint conditions. The process parameters verification test was to verify the
specific assembly process parameters. For example, the tests for the process of heater
stick on large curve surface and the process of thickness control of thermal grease
coating on instrument were conducted for the Chang’E-3 lunar lander.
411
process of the lunar lander would not be affected by lack of technological equipment.
The technological equipment to be planned included hanger, parking trolley, transfer
container, product turnover equipment, special test equipment, and ground special
test equipment.
In the phase B (preliminary design and technology completion) of the Chang’E3 lunar lander development, there were electrical model, structural model, thermal
model and model for landing validation of the lunar lander developed, while electrical
model, structural model and thermal model were developed in parallel. Therefore,
when the technological equipment was planned, it should be planned according to the
technical process flow. The types and quantities of technological equipment should
be determined as well as the usage status.
12.4.3 Planning of Process Test
The planning of process tests was for the specific planning and analysis of the process
verification, process test and process research involved in the design of systematic
assembly process. The objective was to analyze the completeness of process tests,
the approach of process tests, the support of process tests and the relevance with
process flow.
Generally, there were simulated assembly test, digital simulation test and process
parameters verification tests in assembly process tests. The simulated assembly test
was conducted when the product constraints during assembly process could not be
clearly defined, the assembly process flow was not determined, and it was difficult to
conduct man-machine performance evaluation in virtual environment. In the simulated assembly test, the wood product model would be manufactured according to
actual product conditions and constraints, so as to build a real assembly environment. Then the corresponding assembly operation was carried out to find the defects
of assembly process methods and assembly tools to establish feasible assembly plan
and process flow. The advantages of simulated assembly test included full process
validation, good for practice and process training in advance. Nevertheless, the disadvantages included long term of test preparation and difficulties in constraint change.
In the assembly digital simulation test, the three-dimensional model of product could
be applied to virtually evaluate operation accessibility, product interface compatibility and human-machine ergonomics in virtual reality environment. The characteristics of assembly digital simulation test were convenient to verify and change
constraint conditions. The process parameters verification test was to verify the
specific assembly process parameters. For example, the tests for the process of heater
stick on large curve surface and the process of thickness control of thermal grease
coating on instrument were conducted for the Chang’E-3 lunar lander.