The Study Of The Two-Dimension Waving Mirror Structures And The Control System For Early Warning Systems Of The Missile

The early-warning satellite for guided missiles is the reconnaissance satellite which can monitor, detect and track the enemy ballistic missile launcher. The high sensitive infrared detection and the telecamera with telescope are installed on the satellite. The infrared detection can detect the enemy missile's infrared radiation and sound alert signal when the missile flies upward after it's launched from on the surface or underwater. Early warning system of missiles is an real-time infrared reconnaissance camera based on satellite platform, it can simutaneously reconnoiter, discriminate and track the enemy missile, then obtain the information about the missile's flight parameter. So the research of early warning system of missile will be significant to strengthen national defence of our country.The designing of an early-warning system of missile has difficulties because it needs smaller mass, great rigidity, high strength as load on the satellite. It also needs real-time tracing and a pointing and tracking system with stationarity, rapid rotation and high precision. In this thesis, a design scheme is introduced about whole early-warning system's structure according to the optical needs. The focus is placed on the pointing speculum's light-weighting design. Through comparison, SiC is selected as the speculum's material which has features of high strength, low density, well comprehensive performance and being adaptable for space environment. After analysing several kinds of light-weighting structures through ANSYS, hexagonal speculum structure is confirmed.In the aspect of the controling of speculum, the paper adopts the brushless DC motor which is partial assembled to drive the point speculum and the inductosyn as angle measuring component is selected, The AD2S80A the system is used to get directly angle and angular velocity. Double closed-loop speed and position control is designed, as the PID control is the well-developed algorithm, which can achieve stable rotation and precise position control. In order to increase pointing precision, the error caused by inductosyn and AD2S80A are analyzed as a focus, Consequently, high precision inductosyn is used, then current iscompensated and finally the input and output differences are adjusted when...