首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Inertial guidance is the name given to those types of systems which guide and keep track of the location of vehicles which are f
Inertial guidance is the name given to those types of systems which guide and keep track of the location of vehicles which are f
admin
2010-07-06
31
问题
Inertial guidance is the name given to those types of systems which guide and keep track of the location of vehicles which are free to move in three dimensions. Vehicles which move only on a plane surface, such as ships or automobiles, require only an accurate compass, sextant, and clock to keep track of their present position. When a vehicle can travel up or down as well as north or east, it is much more difficult to fix its position. An inertial platform is used in inertial guidance to measure vehicle altitude and acceleration which are then integrated to provide position and velocity. The inertial platform consists of three gyroscopes and three accelerometers mounted in the inner gimbal of the four gimbal platform. The purpose of the inertial platform is to allow the vehicle to move in any direction about the inner gimbal containing the gyros and accelerometers, without disturbing or turning them from their original orientation. Thus the gyros and accelerometers do not mm when the vehicle turns so they sense altitude and acceleration with respect to their original inertial reference frame. If the acceleration is always known with respect to this original inertial reference frame, it can be integrated to provide velocity and then integrated again to provide distance. Thus the distance and velocity of the vehicle with respect to its starting point are known.
Inertial guidance systems are used today in airplanes, submarines, and spacecraft. They display for the pilot his pitch, roll and yaw angles, his heading, his speed, and his latitude and longitude. These are very important items to have readily available, whether one is in a high speed vehicle with very low visibility due to poor weather, or in a spacecraft traveling in lunar orbit. The main features of inertial systems are that they are automatic and do not require any external information. Thus, the pilot does not have to feed in any information except the original position and altitude. Inertial systems serve a need on fast moving vehicles moving in a three dimensional plane, where position information is required by the pilot almost constantly.
According to the selection, the basic concern of the inertial guidance system is
选项
A、space in three dimensions.
B、poor visibility and meteorological conditions.
C、the altitude and position of a vehicle.
D、spacecraft productivity.
答案
C
解析
本题考查推理判断。根据文章的前面几句话可以概括出本制导系统跟踪运动体的高度和位置,换句话说,它的基本相关的事情是运动体的高度和位置,所以选项C 正确。
转载请注明原文地址:https://kaotiyun.com/show/hfDd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
DoesthepublisherofDouglasStarr’sexcellentBlood—AnEpicHistoryofMedicineandCommerceactuallyexpecttosellmanycopi
Duetohistoricalreasons,peopleintheCzechRepubliclacked________.IvoJupawasmovedwhenheheardthatseveralmendrink
WhatislackinginNorthAmerica’sretailindustry?Whatisthemajorfeatureofthenewretailprograms?
Miserabilists’fearofchange;idealists’hopeforabetterworld;anall-purposeadultnostalgiaforlostyouth:allthesethin
DoesthepublisherofDouglasStarr’sexcellentBlood—AnEpicHistoryofMedicineandCommerceactuallyexpecttosellmanycopi
WhoearnslessintheUnitedStatesthanthoseinmanyindustrializedcountries?Howmanytimesdidanexperiencedteacherint
Accordingtothepassage,thechiefpurposeofexplorersingoingtounknownplacesinthepastwas______.Whatisthemaingo
Amethodofparent-teachercommunicationNOTmentionedorreferredtobytheauthorisTheauthor’sprimarypurposeinwriting
Aflighttoothersolarsystemswillbemademorepossibleby______.Accordingtothistext,pilotedspacemissionswillneed
随机试题
一项观察研究采取什么样的观察方式是由什么决定的()
王小波“时代三部曲”中以文革为背景的是()。
患者,男,47岁。下肢弛缓无力1年余,肌肉明显萎缩,功能严重受限,并感麻木,发凉,腰酸,头晕,舌红少苔,脉细数。治疗应首选
患者,女,37岁,被诊断为“焦虑症”,其核心症状是
某管理局对其所属的企业的生产计划完成百分比采用如下分组,其中最能反映事物本质差异的分组是()。
在提出首次公开发行股票申请前,应按证监会的规定对辅导对象进行辅导。辅导对象的具体范围是拟上市公司的()。
长江公司对存货发出计价采用月末一次加权平均法,2018年1月甲存货的收发存的情况为:1月1日,结存40000件,单价为5元;1月17日,售出35000件;1月28日,购入20000件。单阶为8元。假设不考虑增值税等税费,长江公司2018年1月31日甲存货的
定量库存控制方法的简化形式为双堆法。这种方法是将()从库存量中分出来单独存放。
虽然联合国教科文组织以及一些非政府机构和个人正在设法挽救濒危的叙利亚古迹,但同摧毁的速度相比,这些努力仍然是填入画横线部分最恰当的一项是:
在面向对象的程序设计中,类描述的是具有相似性质的一组【】。
最新回复
(
0
)