Computer input, Basic Computer Science

COMPUTER INPUT:

Figure shows input information for a typical airborne digital computer. 

992_COMPUTER INPUT.png

The sensors in Figure develop analogue electrical signals representing: - 

  • Bearing and distance to fixed point (VOR/DME). 
  • Hyperbolic co-ordinates (Omega). 
  • Ground speed and drift angle (Doppler). 
  • Aircraft heading (Compass), etc. 

These analogue signals must be converted into digital signals before being fed to the computer memory.  ADCs, which may be an integral part of the sensor equipment achieve this, or alternatively a converter unit may be installed, which carries out all necessary analogue to digital conversion. 

Computer Output

Many different kinds of output device are used, including traditional devices such as relative bearing indicators and steering indicators.  With these, suitably designed digital to analogue converters must be used.  Similar outputs could be fed to an autopilot. 

Digital read out can be obtained by use of hybrid (digital and analogue) servo systems, which position an output counter drum or alternatively by use of 7 segment indicators.  A ROM, which has the wired in program to convert from binary code to the appropriate drive, drives the segments, which may be light emitting diodes (LED) or liquid crystals (LCD). 

Cathode ray tubes (CRT) are being increasingly used as output devices both for display of alphanumeric information and, less commonly, electronic maps.  CRTs are essentially analogue devices and as such require DACs, which will provide the necessary fairly, complicated drives. 

Moving map displays may also be used as a means of presenting navigation information to the pilot.  The map itself may be an actual chart fitted on rollers, or alternatively projected film.  Closed loop servos, which drive the map, are fed from the computer via DACs. 

 

Posted Date: 9/13/2012 7:30:54 AM | Location : United States







Related Discussions:- Computer input, Assignment Help, Ask Question on Computer input, Get Answer, Expert's Help, Computer input Discussions

Write discussion on Computer input
Your posts are moderated
Related Questions
Write an ARM subroutine which will extract a substring from a string. You will need to use the library routine malloc to allocate memory for the new string. The subroutine signatu

The first reason to work with assembler is that it offers the opportunity of knowing more the operation of your PC, which permits the development of software in a more constant man

Question (a) What is a view? (b) Can we use a view to insert or update a record into a table? Do we have any limitation to perform the above command? (c) The syntax to cr

Two-tiered architecture: This approach basically introduced a database server to replace the file server. The emergence of relational database management systems and graphica

Explain about MIDI audio

Read only memory (rom): The problem with RAM is that its memory is volatile, i.e. it loses all its data when the power supply is removed.  A non-volatile memory is a permanent

QUESTION a) The handling of the INVITE transaction in SIP is completely different from the handling of other transactions. The handling of the INVITE is one of the most complex

THE FOURTH GENERATION (1975 ONWARDS) This generation of computers have one or more of the following characteristics:     Semi-conductor memory instead of core memo


Write a shell script, change-lines, which will substitute a string for a replacement string for each occurance of the string in files specified. The original file will be saved,