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
33
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
Throughouthistorytherehavebeenmanyunusualtaxesleviedonsuchthingsashats,Beds,Baths,marriages,andfunerals.Aton
Accordingtothespeaker,whatareconveniencegoods?
Theaveragepersonseestensofthousandsofimagesaday—imagesontelevision,innewspapersandmagazines,andonthesidesof
Theaveragepersonseestensofthousandsofimagesaday—imagesontelevision,innewspapersandmagazines,andonthesidesof
WhatislackinginNorthAmerica’sretailindustry?Whatisthemajorfeatureofthenewretailprograms?
Quantumwillstillbeonairasthelastprogramsofitarestillinthemakingandaretobeshownasscheduled.Scienceprogr
DoesthepublisherofDouglasStarr’sexcellentBlood—AnEpicHistoryofMedicineandCommerceactuallyexpecttosellmanycopi
WhoearnslessintheUnitedStatesthanthoseinmanyindustrializedcountries?TheUnitedStatesproducesfewer________grad
【B1】Thelegalquestionaboutwhetherandtowhatextentitisappropriatetoauditandmonitorcompanycomputersystemsisnoty
【B1】Thelegalquestionaboutwhetherandtowhatextentitisappropriatetoauditandmonitorcompanycomputersystemsisnoty
随机试题
ThisyearisthetwohundredthanniversaryofthebirthofwriterEdgar/UlanPoe.EdgarAllanPoe,whoselifewas【36】andseemin
以下哪项对诊断急性心衰没有意义
正气胜邪病向愈的苔象变化是正不胜邪胃气暴绝的苔象变化是
其他项目清单的内容不包括()。
英译汉:“certificateofdamage;certificateofcargoG.A.”,正确的翻译为( )。
某企业只生产一种产品,单价20元,单位变动成本12元,固定成本为2400元,满负荷运转下的销售量为400件。下列有关说法中正确的有()。
把社会主义本质概括为“解放生产力,发展生产力,消灭剥削,消除两极分化,最终达到共同富裕”的中国共产党人是()。
区域性目标是指广告目标覆盖一省或几省,这一区域因为()等方面的相同或相似而连成一体。
Thepublishinghousehasbroughtoutan(entire)______neweditionofthedictionary.
Manybusinesses,suchasdepartmentstores,restaurants,hotelsandairlinecompanies,useacreditsystemforsellingtheirpro
最新回复
(
0
)