Analogue computers, Basic Computer Science


A computer is basically a problem-solving device. In aircraft radio systems the problem to be solved is concerned with navigation, in that given certain information, such as range and bearing to a fixed known point, steering commands need to be computed to fly the aircraft to the same, or some other fixed point.

Since the input and output information is continuously changing during flight, analogue computation provides an obvious means of solving the navigation problems.

A block schematic diagram of an analogue computer is shown in Figure.

13_analog computer structure.png

The input devices are radio sensors such as VOR, DME, Omega, ADF, Doppler, Loran, Decca, ILS, and non-radio sensors such as the Air Data Unit and Inertial Navigation System. The output of such sensors will be electrical analogues of the quantities being monitored. The electrical signals contain the necessary information needed to solve the navigation problem, the solution being achieved by the computer.

The computer consists of a variety of analogue circuits such as summing amplifiers, integrators, comparators, sine cosine resolvers, servo systems, etc. The patching network determines the way, in which the analogue circuits are interconnected, which will be such as to achieve the required outputs for given inputs.

There is a disadvantage of analogue computers in that different patching is needed for different applications. Thus aircraft analogue computers are purpose built to solve one particular problem and as such usually form an integral part of a particular equipment.

This lack of flexibility, together with limited accuracy and susceptibility to noise and drift, has led to the introduction of digital computers, made possible by integrated circuits. Even so, the analogue computer, or rather analogue computing circuits, are still extensively used because as stated above, the sensors produce analogue signals.



Posted Date: 9/13/2012 6:47:25 AM | Location : United States

Related Discussions:- Analogue computers, Assignment Help, Ask Question on Analogue computers, Get Answer, Expert's Help, Analogue computers Discussions

Write discussion on Analogue computers
Your posts are moderated
Related Questions
Analog Transmission: In analog transmission, there is a continuous up and down pattern. For example, one wave constitutes one cycle, which is measured in the unit called Hertz

Question 1 Explain different functions of an operating system. Explain the evolution of operating systems Question 2 Explain process creation and process termination Ques

Question 1 Bring out the advantages of Linux Operating systems Question 2 Match the Symbols with their respective file types              Symbol               File N

how to save a Vector theList to a .txt file and read that .txt file to a jsp page /??

QUESTION (a) What is an abstract data type? (b) Give two limitations of the array implementation of lists. (c) Give the major disadvantage of the dynamic implementation o

Problem 1. Briefly explain on the characteristics of computers Explanation of characteristics of computers 2. Write a note on Cache Memory Note on Cache Memor

A car battery is of 12 V. Eight dry cells of 1.5 V each connected in series can give 12 V. But such cells are not used in starting a car. Why?

QUESTION (a) Describe what is meant by Clock Skew and Clock Drift among clocks in a distributed system. (b) A clock is reading 08:25:46.0 (hr:min:sec) when it is discovered

OSI Layers: Open Systems Interconnection model is a reference model developed by International Organization for Standardization in 1984, as a conceptual structure of principles fo

why do computer have internal memory as a part of cpu and the internal bulk memory seprately?