Name of the College : Noorul Islam College of Engineering
University : Anna University
Degree : B.E
Department : Aeronautical Engineering
Subject Code/Name : AE 1401 – Avionics
Document Type : Question Bank
Website : niceindia.com
Download Model/Sample Question Paper :https://www.pdfquestion.in/uploads/niceindia.com/3052-AE_1301-_FLIGHT_DYNAMICS.pdf
NICE Avionics Question Paper
Part-A :
1. Define the term Avionics systems. :
Ans :-
All electronic and electromechanical systems and subsystems (hardware and software) installed in an aircraft that are dependent on electronics for its operation. Avionics Systems are essential to enable the flight crew to carry out the aircraft mission safely and to meet the mission requirements with minimum flight crew.
Related : Noorul Islam College of Engineering AE1301 Flight Dynamics B.E Question Bank : www.pdfquestion.in/3054.html
2. Explain briefly Flight management system (FMS) :
Ans :-
Outputs from the GNSS sensors, air data sensors and other on-board sensors are used by FMS to perform the necessary navigation calculations and provide information to the flight crew via a range of display units. The flight management system provides the primary navigation, flight planning, and optimized route determination and en route guidance for the aircraft and is typically comprised of the following interrelated functions : navigation, flight planning, trajectory prediction, performance computations, and guidance. To accomplish these functions the flight management system must interface with several other avionics systems.
3. Explain FBW control system. :
Ans :
** Enables a lighter, higher performance aircraft designed with relaxed stability
** Good consistent handling which is sensibly constant over a wide flight envelope and range of load conditions
** Continuous automatic stabilization of the aircraft by computer control of the control surfaces
** Auto pilot integration
** Care free maneuvering characteristics
** Ability to integrate additional controls automatically such as
** Leading edge slats/flaps and trailing edge flaps to generate additional lift
** Variable wing sweep
** Thrust vector control nozzles and engine thrust
** Elimination of mechanical controls runs – friction, backlash
** Small control stick
** Ability to exploit aerodynamically unstable configuration
** Aerodynamics versus stealth – the concept of reducing the radar cross section
** Very high integrity, a failure survival system.
4. What do you mean by House keeping management? :
Ans :-
The term ‘house keeping’ management has been used to cover the automation of the background tasks which are essential for the aircraft’s safe and efficient operation
Such tasks include :
** Fuel management
** Electrical power supply system management
** Cabin/cockpit pressurization systems
** Environmental control system
** Warning systems
** Maintenance and monitoring systems.
5. What are the main characteristics of touch screens? :
Ans :-
** Fully Connected Speech
** Must Be Able to Operate in the Cockpit Environment
** Vocabulary size – required size is around 200-300 words
** Speech template duration – Speech Template Duration is around 5 Seconds
** Vocabulary duration – Maximum duration of the total vocabulary is around 160 seconds
** Syntax nodes – max. no. of syntax nodes required is 300
** Duration of utterance – no restriction on the max. duration of an input utterance
** Recognition response time – this must be in real time.
6. What is the function of inertial sensor systems? : What are the various inertial sensor systems used in aircraft?:
Ans :-
They provide attitude and heading information which are essential for a/c mission.
Various inertial sensor systems are :
** Gyros – mechanical – electromechanical – RLG-FOG
** Accelerometer
** AHRS(Attitude Heading Reference Systems)
** Strap Down
** Gimballed systems
7. Explain Radar systems. :
Ans :-
** Installed in all civil airliners & in many general aviation aircraft
** To detect water droplets and provide warning of storms, cloud turbulence and severe precipitation-aircraft can alter course and avoid such turbulent conditions
** It should be noted that in severe turbulence, the violence of the vertical gusts can subject the aircraft structure to very high loads and stresses
** These radars can also generally operate in ground mapping and terrain avoidance modes.
** In the airborne interception mode, the radar, must be able to detect aircraft upto 100 miles away and track while scanning and keeping tabs on several aircraft simultaneously (typically at least 12 aircraft)
** The radar must also have a ‘look down’ capability and be able to track low flying aircraft below it.
8. What are the different methods of navigation? :
Ans :-
**Classic dead-reckoning navigation using air data and magnetic, together with Doppler or LORAN-C;
**Radio navigation using navigation aids – ground-based radio-frequency beacons and airborne receiving and processing equipment;
**Barometric inertial navigation using a combination of air data and inertial navigations (IN) or Doppler;
**Satellite navigation using a global navigation satellite system (GNSS), more usually a global positioning system (GPS);
**Multiple-sensor navigation using a combination of all the above.
9. Explain briefly radio navigation. :
Ans :-
The primary means of navigation over land was by means of radio navigation routes defined by VHF omni ranging/distance measuring equipment (VOR/DME) beacons. By arranging the location of these beacons at major navigation or crossing points, it was possible to construct an entire airway network that could be used by the flight crew to define the aircraft flight from take-off to touchdown. Other radio frequency aids include distance measuring equipment (DME) and non-distance beacons (NDB).
10. Describe briefly inertial navigation :
Ans :-
Using inertial navigation systems (INS), flight crew are able to navigate by autonomous means using an on-board INS with inertial sensors. By aligning the platform to earth-referenced coordinates and present position during initialization, it is possible to fly for long distances without relying upon LORAN, VOR/DME or TACAN beacons. Waypoints could be specified in terms of latitude and longitude as arbitrary points on the globe, more suited to the aircraft’s intended flight path rather than a specific geographic feature or point in a radio beacon network.