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3 System Design of Lunar Lander
Fig. 3.14 Thrust vibration of typical working condition. a Diagram of thrust vibration at equivalent
load point 1. b Diagram of thrust vibration at equivalent load point 2. c Diagram of thrust vibration
at equivalent load point 3
The response of acceleration and angular displacement to middle and high
frequency vibration caused by thrust vibration was analyzed by Finite Element
Analysis software to evaluate effects on sensitive equipments on lunar lander.
4) Analysis of radiation effects of Radioisotope Thermal Unit (RTU)
The RTU was adaptable to different environment and reliable. It was not sensitive
to space radiation damage. It could survive under different worse environment such
as impact, acceleration, vibration, space vacuum and extreme temperature in space
application. But the radioactivity of raw material of RTG would have effects on
surrounding environment. Now the
238 Pu was the major raw material of RTU in
space application, which could generate heat by its own decay. There were several