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
28
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.
It can be interred from the article that an inertial guidance system is similar to
选项
A、a gyroscope.
B、a high speed vehicle.
C、a navigator.
D、a submarine.
答案
C
解析
本题考查推理判断。根据文章第一句话,可知,惯性制导系统能够控制并记录在三维空间里运动的运载工具的位置,很像导航设备,所以选项C 正确。选项A gyroscope(陀螺仪)是制导系统的一部分,所以排除;从文中找不到这种制导系统像高速运载工具依据,所以选项B 错误;选项D submarine(潜水艇)使用这种制导系统,因此本身不可能类似这种系统,也是错误的。
转载请注明原文地址:https://kaotiyun.com/show/QfDd777K
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
Whatdidthespeakertalkaboutlasttime?
DoesthepublisherofDouglasStarr’sexcellentBlood—AnEpicHistoryofMedicineandCommerceactuallyexpecttosellmanycopi
DoesthepublisherofDouglasStarr’sexcellentBlood—AnEpicHistoryofMedicineandCommerceactuallyexpecttosellmanycopi
Throughouthistorytherehavebeenmanyunusualtaxesleviedonsuchthingsashats,Beds,Baths,marriages,andfunerals.Aton
Whatisyourresponsibilitywhenyou,asaschoolprincipal,gettheteacher’sreport?
Oneofthemostalarmingthingsaboutthecrisisintheglobalfinancialsystemisthatthewarningsignshavebeenouttherefo
Quantumwillstillbeonairasthelastprogramsofitarestillinthemakingandaretobeshownasscheduled.ABCwillrese
Quantumwillstillbeonairasthelastprogramsofitarestillinthemakingandaretobeshownasscheduled.Scienceprogr
Miserabilists’fearofchange;idealists’hopeforabetterworld;anall-purposeadultnostalgiaforlostyouth:allthesethin
DoesthepublisherofDouglasStarr’sexcellentBlood—AnEpicHistoryofMedicineandCommerceactuallyexpecttosellmanycopi
随机试题
在其他条件相等的情况下,往往一个学习材料两端的项目学习快、记得牢,而中间部分总是学的慢、记得差些。可用于解释这种知识遗忘的理论是()。
最先运用生态理论来研究政府行政现象的学者是()
某日本商人向中国出口化纤产品一批,CIF天津价,合同有不可抗力条款,由于海湾事件,石油价格暴涨,日商成本增加了20%,便向中方提出提高出口价格,否则拒绝交货,因为发生了不可抗力,则()
人体处于交感兴奋状态时,尿量减少的主要原因是
根据血药浓度制定的给药方案主要有
通用报表系统提供一种接口由用户自己定义报表的格式、数据来源以及计算方法,因此它能生成各种格式不同的报表。
下列有关机器设备评估的说法错误的是()。
我国现行义务教育的法定起始年龄是()
根据所给资料,回答下列问题2017年我国机场全年旅客吞吐量达到11478.7万人次,比上年增长12.9%,分航线看,国内航线完成10361.46万人次,比上年增长13.4%(其中内地至香港、澳门和台湾地区航线完成2710.9万人次,比上年下
A、Acollection.B、Anovel.C、Apoem.D、Afairytale.A文章在开头部分提到,史密斯以其作品集《火星生活》获得普利策奖,这是她在波恩兰姆小丘的家里进行写作的,故答案为A)。
最新回复
(
0
)