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This paper presents a constructive discussion and inclusive review on advancements in the coded modulation free-space optical (FSO) communication system and corresponding techniques. These techniques mainly include channel model, forward error correction (FEC) and modulation schemes. Firstly, a complete view of FSO system is presented which contains the description, the current research situation...
How MATLAB, Simulink and stateflow can be used to design and realize a simulation platform for UAV multi-mode flight control system is presented. The simulation platform includes nonlinear dynamic model of UAV, control system and environment model which is to make the simulation more similar to the real flight environment. The environment model consists of wind shear submodel, atmosphere submodel...
Multi-frequency eddy current test technique is applied in the industrial non-destructive testing more and more widely. Every frequency component contains the useful information and the harmful noise when the eddy current sensor is excited by several sine signals. The impedance property of the sensor is a key element in the test system, so this paper analyzed it by finite element method simulation...
A method of lightweight optimization design based on crash is developed for car body. The thicknesses of car body parts are optimized with an objective of minimized body weight and the restraint of body stiffness and modal. The crashes of car body and occupant restraint system are simulated to verify the safety performance of lightweight car body. The thicknesses of parts are modified with the result...
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