| 翻訳と辞書 |
Dumaresq
The Dumaresq is a mechanical calculating device invented around 1902 by Lieutenant John Dumaresq of the Royal Navy.
The dumaresq is an analog computer that relates vital variables of the fire control problem to the movement of one's own ship and that of a target ship. It was often used with other devices, such as a Vickers range clock, to generate range and deflection data so the gun sights of the ship could be continuously set.
A number of versions of the Dumaresq were produced of increasing complexity as development proceeded.
==Geometric Principle==
The dumaresq relies on sliding and rotating bars and dials to calculate the relative motion of the enemy ship and to convert this into a "range rate" (the component of motion along the line of bearing) and "dumaresq deflection" (or "speed across" .. the component perpendicular to the range rate). Because the dumaresq is an analog or model of the relative motion of the two ships, it does not intrinsically favor which of its settings is an input and which is an output. This allows it to be used "backwards" -- a process called a "cross cut" -- to take sequential estimates of the range and bearing of an enemy vessel and discover its speed and heading that would be consistent.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Dumaresq」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|