| During the last phase of auto-landing of Shipborne UAV (unmanned air vehicle), to make the UAV identify and track, and finally fly into the intercept net fixed on the rear deck accurately, it should be considered that the ups and downs of deck influence the landing of UAV. The naval ship, as a three-dimensional object, which are whirling around three space axis while it is tossing. Among the parameters of stance and orientation, there are a complicated coupled connection. Therefore this is a typical application on navigation algorithmic. The heave height of the deck ,which is needed really ,is an important guidance parameter for the UAV in the process of landing while we should find all navigation parameters firstly. Considering the advantages of MEMS (Micro Electrical Mechanical Systems),such as its low costs, small size, light weight, high integration and reliability, which can bear abominable climate environment and mechanical environment ,this paper puts forward a quaternion simulink model for measuring heave height and designs a heavy height measuring system based on SINS theory and MEMS(micro electronic and micro mechanical ) inertial sensors technique. In the last the paper analyses the system error and observes idealer results by system testing.The main contributions of this dissertation are summarized as follows:Firstly, the studying object and the development background of the relative technique are introduced.Secondly, the theory of the micro inertial height measurement is depicted.Thirdly, arithmetic model base on Simulink for micro inertial heave height measurement is offered ,including the result analysis for the simulation.Fourthly, the whole hardware design base on ADuC841 single chip of the MEMS-SINS height measuring system is illuminated.Fifthly, software design is introduced.Sixthly, system error is analyzed and sensors error is adjusted and the performance of this system is tested.Finally, the article is summarized and a proposal of the system is given.
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