2009年上海海事大学航海仪器考研真题.doc

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2009 年上海海事大学航海仪器考研真题一、简述自由陀螺仪在北纬的视运动规律及其原因，分别叙述把自由陀螺仪变为陀螺罗经的几种方法。（15 分） _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ 二、摆式罗经等幅摆动的运动轨迹有何特点?（15 分） _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ 三、简述陀螺罗经速度误差的产生原因和特点，某船在北纬 30 度，罗经航向 000、航速 10 节，求真航向?（15 分） _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________

四、分析三大系列陀螺罗经灵敏部分的构成，它们之间有何不同?（15 分） _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ 五、简述安许茨 22 型陀螺罗经随动系统的组成，并说明各个部分的作用和随动系统的工作原理。（15 分） _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ 六、简述船用回声测深仪的整机构成，时序及各部分的作用，存在那些误差?（15 分） _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ 七、试分析声相关计程仪的测速原理，声相关计程仪有何特点?（15 分） _______________________________________________________________________________ _______________________________________________________________________________

_______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ 八、分析双曲线系统使用脉冲法测量法，应该满足什么样的条件才能消除多值性问题。（15 分） _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ 九、试分析 GPS 定位系统的定位误差?（15 分） _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ 十、简述 DGPS 的工作原理和方法特点，DGPS 可以减小或取消那些误差?（15 分） _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________

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