Accurate Mobile Robot Dead-Reckoning with a

引航员英语考试题及答案一、选择题（每题2分，共10题）1. Which of the following is the correct way to express "turning to port" in navigation?A. Turn to starboardB. Turn to portC. Turn to larboardD. Turn to leeward答案：B2. What does the term "dead reckoning" refer to in navigation?A. Calculating a ship's position based on its speed and directionB. A navigational technique using celestial bodiesC. The use of electronic devices to determine positionD. A method of estimating the position of a ship without any external references答案：D3. What is the international maritime signal for "I am onfire and have dangerous cargo on board"?A. NB. MC. PD. Q答案：D4. Which of the following is not a type of navigational buoy?A. Can buoyB. Cone buoyC. Barrel buoyD. Sphere buoy答案：D5. What does the term "set and drift" mean in navigation?A. The movement of a ship due to wind and currentB. The change in a ship's position due to tidesC. The movement of a ship due to engine powerD. The change in a ship's position due to waves答案：A6. What is the standard unit of measurement for speed in navigation?A. KnotsB. Miles per hourC. Kilometers per hourD. Feet per second答案：A7. What does the term "leeway" refer to in navigation?A. The sideways movement of a ship caused by the windB. The angle between the ship's bow and the true northC. The distance a ship travels in a given timeD. The speed of a ship relative to the water答案：A8. What is the term for the angle between a ship's heading and the direction of the wind?A. HeadingB. BearingC. Wind angleD. Course答案：C9. What is the term for the distance a ship travels in a given time?A. SpeedB. DistanceC. CourseD. Rate答案：A10. What is the term for the direction in which a ship is pointing?A. HeadingB. CourseC. BearingD. Azimuth答案：A二、填空题（每题2分，共5题）1. The international maritime signal for "I am sinking" is__________.答案：C2. The term "trim" in navigation refers to the __________ ofa ship.答案：buoyancy3. The direction of the wind relative to the ship is known as the __________.答案：windward4. The term "lee" refers to the side of a ship that is__________ the wind.答案：sheltered from5. The term "beam reach" refers to a ship sailing with the wind coming from __________.答案：the side三、简答题（每题5分，共2题）1. Explain the difference between "latitude" and "longitude" in navigation.答案：Latitude refers to the angular distance of a point north or south of the equator, measured in degrees. Longitude refers to the angular distance of a point east or west of the prime meridian, also measured in degrees.2. Describe the function of a gyrocompass in navigation.答案：A gyrocompass is a type of compass that uses a rapidlyspinning disc in a vacuum to maintain its orientation aligned with the Earth's axis of rotation, providing a stable and accurate indication of true north, which is essential for navigation.。

基于单片机的智能小车文献综述超详细Document number【AA80KGB-AA98YT-AAT8CB-2A6UT-A18GG】基于单片机的智能小车文献综述摘要：随着电子工业的发展，智能技术广泛运用于各种领域，智能小车不仅在工业智能化上得到广泛的应用，而且运用于智能家居中的产品也越来越受到人们的青睐。

国外智能车辆的研究历史较长。

相比于国外，我国开展智能车辆技术方面的研究起步较晚，在智能车辆技术方面的研究总体上落后于发达国家但是也取得了一系列的成果。

随着人工智能技术、计算机技术、自动控制技术的迅速发展，智能控制将有广阔的发展空间。

本文就智能小车研究现状以及未来的应用与发展前景做一个全方面的介绍。

关键词：智能技术，STC89C52单片机，自动循迹，避障1.前言随着电子技术、计算机技术和制造技术的飞速发展，数码相机、DVD、洗衣机、汽车等消费类产品越来越呈现光机电一体化、智能化、小型化等趋势。

智能化作为现代社会的新产物，是以后的发展方向，他可以按照预先设定的模式在一个特定的环境里自动的运作，无需人为管理，便可以完成预期所要达到的或是更高的目标[6]。

智能小车，也称轮式机器人，是一种以汽车电子为背景，涵盖控制、模式识别、传感技术、电子、电气、计算机、机械等多科学的科技创意性设计，一般主要路径识别、速度采集、角度控制及车速控制等模块组成。

一般而言,智能车系统要求小车在白色的场地上,通过控制小车的转向角和车速,使小车能自动地沿着一条任意给定的黑色带状引导线行驶[1]。

本次课题设计以此为背景，设计一种简易的运动小车，运用直流电机对小车进行速度和正反方向的运动控制，通过单片机来控制直流电机的工作，从而实现对整个小车系统的运动控制。

2.主题智能车辆作为智能交通系统的关键技术，是许多高新技术综合集成的载体。

智能车辆驾驶是一种通用性术语，指全部或部分完成一项或多项驾驶任务的综合车辆技术。

智能车辆的一个基本特征是在一定道路条件下实现全部或者部分的自动驾驶功能，下面简单介绍一下国内外智能小车研究的发展情况[3]。

输出变化与输入变化的比值 然而, 在实际测量环境中, 传感器对环境的变化也十分敏感 例如，光学成像对光照变化十分敏感
交叉敏感度/Cross-sensitivity
对与目标参数正交的环境参数的敏感度
误差与准确度/Error & Accuracy
传感器输出值与真实值之间的差
error
4.1.2
m =测量值 ，v = 真实值
移动机器人需要感知、分析和解释周围的状态 真实环境中的测量是动态变化并产生误差的. 例如:
变化的光照条件/changing illuminations 镜面产生的反射/specular reflections 吸收声光的表面/Light or sound absorbing surfaces 机器人传感器对机器人姿态和机器人环境动力学的交叉敏感度
光学陀螺仪/Optical Gyroscopes
商用开始于80年代初期在飞机上安装使用. 观学陀螺仪/Optical gyroscopes
利用同一光源发射的两个单色束角或激光光束获得 速度（导向）传感器. 一束顺时针行进通过光纤, 另一束绕圆柱体逆时针行进 激光光束沿着旋转方向行进 行进路径偏短-> 表现出较高的频率 两束光频率之差Df 正比于圆柱体的角速度 W 新的固体光学陀螺仪也是基于同样原理采用微加工工艺制作.
© R. Siegwart, I. Nourbakhsh
一般分类/General Classification (1)
/触觉 /轮置电机传感器
/朝向
4.1.1
© R. Siegwart, I. Nourbakhsh
一般分类/General Classification (2)
/地面信标 /主动测距

1 Introduction
Autonomous underwater vehicles AUVs have the potential to revolutionize our access to the oceans to address critical problems facing the marine community such as underwater search and mapping, climate change assessment, marine habitat monitoring, and shallow water mine countermeasures. Navigation is one of the primary challenges in AUV research today. The goal of this paper is to survey previous work in AUV navigation and to make suggestions for future research in this area.
Currently at Walt Disney Imagineering, P.O. Box 1403, Cambridge, MA 02142-0010
MIT Marine Robotics Laboratory Technical Memorandum 98-1
2
Other aspects of the problem, such as managing uncertainty, are generic to mobile robotics research. New techniques for AUV navigation have potential to be useful for mobile robots operating in natural and dynamic environments on land and in space.