Research On The Hardware-in-the-loop Simulation System Using Laser Scanning Guidance Technique

Conventionally,implementation of the practical airborne laser communication has several inherent shortcomings of high-cost and consuming enormous resources.Complete simulation with software is also incapable of accurately evaluating the performance of the configuration.In this dissertation,a hardware-in-the-loop simulation and verification modality has been proposed and demonstrated to test the performance of airborne laser communication system.The variations of relative positional relationship between aircrafts are simulated in the laboratory environment,and the necessary target model is provided as a transmitter or receiver,which enable accurately verifying various characteristics of the airborne laser communication system with a cost effective way.By means of constructing a rotation platform,operation and manipulation of the simulation target is realized,and simulating the positional relationship between different flight vehicles is accomplished.Moreover,two types of newly-designed optical systems are described in detail,which are both used as a target simulator for laser communication in space.The main works of this dissertation are shown as following:After analysis on several feasible coordinate systems,the cylindrical coordinate system was chose to describe the rotation platform.In terms of the motion-control characteristics and essential requirements of the utilization,the core components of driving,testing and supporting parts are compared and discussed,and feasibility of the scheme is quantitatively analyzed and calculated.The laser scanning guidance modality towards the demands of laser communication in space is established.In view of two typical operation modes for laser communication,the approaches of galvanometer scanning and double wedge scanning are both utilized to implement the optical scheme.Mechanical design of movable rotation platform is accomplished and analyzed.With the position accuracy of point coordinate of ±2 mm,the achievable range for simulated spatial motion was(2m,180°,1m).In addition,a laser ranging device is employed for displaying the point coordinates of simulation system in real-time.With quantitative calculation of the motion blind area,the effective range of motion is capable of reaching 98.6%.The collimation and shaping of laser source are designed by self-focus lens and aspheric lens.After manufacture and assembling,the optimized collimation angle is 0.2mrad,and the energy uniformity of laser spot is better than 93%.The optical design of the laser transmitting and receiving system,relies on galvanometer and double wedge,respectively,is accomplished by Code V,and the attainable scanning field of view was40°×40°.Meanwhile,the mechanical design,processing,assembly and experimental testing of the optical system were successfully performed.