Research On Structure Design Of Fast-Steering Mirror And It's Dynamic Characteristics

The fast-steering mirror is a device used to control the direction of light beam accurately, with great inertia mechanical structure, form a compound shaft tracking system which apply to drive and stabilize the light beam. As a sensitive instrument, it is very significant in astronomical telescope, laser communication, tracking and sighting system, picture stability optical system and autoadaptation optical system, etc. In recent years, this device is developing continuously at home and abroad.The content in this paper comes from Chinese Academy of Sciences second innovation item named the technical study in fine tracking system with high bandwidth inferior servo control and fast-steering mirror, includes several parts below:Firstly, this paper introduces a survey of fast-steering mirror development at home and abroad, analyzes the mechanical structure and function of some foreign shaftless reflectors and some domestic axiferous reflectors, explains at some length the formation theory of the FSM, puts forward a specific design proposal of shaftless fast-steering mirror.Secondly, based on the syntony frequency and the elasticity mechanics and other correlative professional knowledge, establishes a suit of FSM vibration module system, selects the structure, material and the process and treatment technique of the elastic element in the elastic system of the mirror, analyzes a lot of factors which affect the structure of the rapid controlling reflector and provides the derivation formula.Thirdly, in the light of the demands'that the large-scale photoelectric tracking and sighting equipment now available ask for FSM and the specific demands of the fast-steering mirror, designs a set of shaftless rapid controlling reflector system which impels manufacturing enterprises to bourgeon a suit of new productive processing method which differentiate completely from that of the axiferous fast-steering mirror system.Fourthly, on the basis of the integration of the theoretical analysis with engineering experiment, develops a set of hardware and software system apply to thisequipment, upbuilds a perfected FSM ring opening experimental system which is demonstrated by experimental theory and tested by computer simulation using the software of SOLID EDGE and COSMOS. The results prove the correctness of the theoretical analysis and the value of the engineering application.