The Launch Platform Active Vibration Isolation Technology Research

Laser inertial confinement fusion (ICF) research’s long-term goal is to achievecontrolled nuclear fusion, and provides the ideal energy for mankind. As star-II, star–Ⅲ、SG-Ⅲ prototype device and SG-III for the establishment ofthe host, ICF laseris in terms of "the five one" synchronization of research and development such as intheory, laser device, the experiment system of diagnosis and target. In recent years,people more and more feel the importance of "precision physics", expecting throughdiagnosis, target system and laser precision synchronization to get reliableexperimental physics data, therefore, we need to develop a stable carrying system. Itis a set of complex precision machinery and control system, it is a challengingengineering projects and a complex series of technical problems, one of the mostimportant task is how to take internal dynamic vibration reduction measures to reducevibration, and vibration will not be passed to the target chamber and range to supportthe ground, it relates to the success or failure of shooting experiment.This paper has studied on active vibration control theory of the precise instrumentwith the carrying platform. According to project tasks and research status at home andabroad, the theoretical research combined with computer simulation and experimentto complete the work of precision instrument and equipment modeling and vibrationalgorithm of active vibration research and experimental verification. This article firstanalyzes the main vibration mode of carrying platform, such as single degree offreedom vibration, harmonic vibration and transient vibration. And then we analyzethe characteristics of the entire structure of the carrying platform, including overallstatics analysis, cantilever tube static analysis, modal analysis and the linear dynamicsanalysis. At the same time we introduce the basic concept and design principle ofvibration isolation technology, and we establish the single degree of freedomvibration model and the cantilever beam vibration model, at the same time we carryon the theoretical calculation and numerical simulation, obtain suitable for the carrying platform system vibration isolation control algorithm by comparingsimulation data. Finally, we construct experiment platform and use the simulationcontrol algorithm to verify the vibration isolation effect, and put forward the idea ofusing frequency spectrum analysis method for vibration source. At the end of thearticle, we summarize the main research work of this paper, and prospect the futureresearch work.