Harrison's approach was to build a clock that would keep Greenwich time faithfully; by comparing local time ( measured using the position of the sun) with the time in London, the navigator would know how far east or west the ship had sailed. 哈里森的办法是先安装一只严格遵守格林尼治时间的钟表,然后根据太阳的位置来确定当地时间。领航员只要将当地时间与伦敦时间进行比较,就可以知道船舶向东或向西航行了多远。
A new approach to design a systematic switching linear parameter-varying controller to determine if it is practical to use for ship steering was presented, which aimed at nonlinear of ship steering. 本文介绍了一种基于无线电罗盘自动测试系统的航向角信号仿真设计方法,并针对一种具体被测设备的特点进行了仿真分析和设计。
As an example, the approach is applied to a typical ship section curve and it is shown that the approach can produce the hull lines with significantly improved fairing characteristics. 应用该方法光顺典型的船体横剖面曲线,表明可得到满意的光顺效果。
As we know that nerve network can approach all kinds of nonlinear system, we can get a precision ship model by talking about characteristic of steer, oar, ship body and the influence of wind, flow and wave. 本文利用神经网络能拟合各种非线性系统的特性,分别考虑桨、舵、船体的动力学特性以及风、流、浪力的影响,得到了较为精确的数学模型。