Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.
RISK ANALYSIS OF ELECTROMAGNETIC
ENVIRONMENTAL EFFECTS IN AIRCRAFT
SYSTEM
GUIDE:MISS JISHA.M.V PRESENTED BY,
ASSISTANT PRO...
o The interaction of electrical and magnectic fields emanating from systems
within an aircraft,or the interaction between ...
o Hazardous electromagnetic Environmental Effect in aircraft
systems includes
• Lightning
• High Intensity Radiated Fields...
• Lightning:
The electromagnetic interference caused by lightning striking the aircraft is
the major issue.
The high energ...
• PED:Portable Electronic Device
It can produce signals that effect electronic equipment.Symptoms and
failure went off whe...
STANDARD RISK MODEL FOR E3
Risk analysis methodology is an underutilized but well suited tool for
understanding and mitiga...
7EC DEPARTMENT
COMPONENTS
1 Risk event: The happening or state that triggers a loss in safety or
economic value.
2 Risk event driver:Some...
4) Impact driver: Something existing in the problem situation
that leads one to believe that a particular impact such as s...
ADVANTAGES OF SRM MODEL
1. The SRM is fairly simple to understand and captures the essence of
resolving risks.
2. It clear...
E3 RISK EVENTS, IMPACTS AND DRIVERS
 Risk Event Identification in Aircraft
• Direct lightning
• CAUSES:-
1. Fuel tank exp...
 HIRF EVENTS
• Couple the energy from airport radars and radio transmitters there by
causing the damage.
12EC DEPARTMENT
 PED
• RF emission of PED’S lead to coupling with EM waves of aircraft there by
causing damage.
13EC DEPARTMENT
 P-STATIC RISK EVENT
• Which effect the radio communication and navigation of aircraft.
• Equipment to equipment interfer...
FACTORS LEADING TO RISK EVENTS
• Flammable vapor in fuel tank
• Triggering sparks
• Improper grounding
• Corrosion of wire...
IMPACTS
Impact occurs at system level as well as component level
MAJOR IMPACTS
• Fuel tank ignition
• Damage flight contro...
RISK RESOLUTION
17EC DEPARTMENT
Risk resolution steps by creating and examining risk table and risk map
18EC DEPARTMENT
Risk levels are first evaluated and expressed as expected loss.
Risk levels of each risk events are examined risk threshol...
Risk Evaluation And Monitoring Based on Risk Map
• Risk status of each risk event is clearly understood with respect to a
...
RISK EVENT PREVENTION PLAN
• Risk prevention comes out naturally by examining the risk event drivers
carefully.
• Inflamma...
IMPACT CONTINGENCY PLAN
• The concept of redundancy ,error correction coding and software design are
utilized to establish...
• Major risk events and impacts for aircraft EM hazards were identified and
their drivers have been discussed.
• Preventio...
REFERENCE
1. C.R Paul, Introduction to electromagnetic compatibility
2. B.S Blanchard and W.J Fabryeky.system engineering ...
25EC DEPARTMENT
Upcoming SlideShare
Loading in …5
×

RISK ANALYSIS OF ELECTROMAGNETIC ENVIRONMENTAL EFFECTS IN AIRCRAFT SYSTEM

186 views

Published on

Detailed study about risk analysis in aircraft due to electromagnetic environmental effects.

Published in: Science
  • Be the first to comment

RISK ANALYSIS OF ELECTROMAGNETIC ENVIRONMENTAL EFFECTS IN AIRCRAFT SYSTEM

  1. 1. RISK ANALYSIS OF ELECTROMAGNETIC ENVIRONMENTAL EFFECTS IN AIRCRAFT SYSTEM GUIDE:MISS JISHA.M.V PRESENTED BY, ASSISTANT PROFFESSOR KAVYA.P.P. ECE DEPARTMENT ROLL NO:39
  2. 2. o The interaction of electrical and magnectic fields emanating from systems within an aircraft,or the interaction between the aircraft and the external environment,can create unwanted effects,which may adversely impact the flight of aircraft. o Electromagnectic Environmental Effects(E3) in aircraft is one of the major concerns to aviation industry. o Protection of aircraft designs against Electromagnectic Environmental Effect(E3) therfore must be assured as part of initial design. 2EC DEPARTMENT
  3. 3. o Hazardous electromagnetic Environmental Effect in aircraft systems includes • Lightning • High Intensity Radiated Fields(HIRF) • Precipitation-static(P-static) • Portable electronic devices(PEDs) • Electromagnetic compatibility(EMC) 3EC DEPARTMENT
  4. 4. • Lightning: The electromagnetic interference caused by lightning striking the aircraft is the major issue. The high energy and high voltage can effect the aircraft hardware as well as the data. • HIRF: High Intensity Radiated Field Electromagnetic interference caused by HIRF have adverse effect on aircraft system. This is an external energy source having sufficient energy. • EMC:Electromagnectic Compatibility EMC means that a device is compatible with environment and it does not emit levels of EM energy. • EMI: An electromagnetic disturbance which may degrade the performance of an equipment or causes malfunction of the equipment called electromagnectic interfernce 4EC DEPARTMENT
  5. 5. • PED:Portable Electronic Device It can produce signals that effect electronic equipment.Symptoms and failure went off when passengers were asked to switch PED • P-STATIC: Precipitation-static It is an electrical charge on an airplane caused by flying through rain, snow, ice or dust partiicles.When the aircraft charge is great enough it discharge in to the surrounding air. 5EC DEPARTMENT
  6. 6. STANDARD RISK MODEL FOR E3 Risk analysis methodology is an underutilized but well suited tool for understanding and mitigation of electromagnetic hazardous effects in aircraft system. • Risk is defined as the potential that something will go wrong as a result of an event or series of events. • One of the most helpful method to understand risk and to develop mitigation of risk. 6EC DEPARTMENT
  7. 7. 7EC DEPARTMENT
  8. 8. COMPONENTS 1 Risk event: The happening or state that triggers a loss in safety or economic value. 2 Risk event driver:Something existing in the event environmental that leads one to believe that a particular risk event such as EM incidents could occur. 3 Impact of a risk: The consequence or potential loss that might result if a risk event occurs. Impact itself may have system-subsystem- component structure. 8EC DEPARTMENT
  9. 9. 4) Impact driver: Something existing in the problem situation that leads one to believe that a particular impact such as system level EM damage or upset could occur. 5) Total loss: The magnitude of the actual loss value acquired when a risk event occurs 6) Probability values: Probability values are assigned to EM risk events and impact. 9EC DEPARTMENT
  10. 10. ADVANTAGES OF SRM MODEL 1. The SRM is fairly simple to understand and captures the essence of resolving risks. 2. It clearly separates the risk events and their impact thus supporting cause and effect analysis 3. Separating risk and impact reinforces the notion of prevention or contingency planning for risk 4. By allocating the drivers related to a risk event, we can identify the threats and deal with those that contribute the most the risk events 10EC DEPARTMENT
  11. 11. E3 RISK EVENTS, IMPACTS AND DRIVERS  Risk Event Identification in Aircraft • Direct lightning • CAUSES:- 1. Fuel tank explosion 2. Flame damage 3. Fasteners and engine damage 4. Antenna damage • Indirect lightning Occurs when the lightning current on the aircraft surface generates magnetic fields which induce voltage on the wire bundles 11EC DEPARTMENT
  12. 12.  HIRF EVENTS • Couple the energy from airport radars and radio transmitters there by causing the damage. 12EC DEPARTMENT
  13. 13.  PED • RF emission of PED’S lead to coupling with EM waves of aircraft there by causing damage. 13EC DEPARTMENT
  14. 14.  P-STATIC RISK EVENT • Which effect the radio communication and navigation of aircraft. • Equipment to equipment interference events occurs when emitted EM emission energy is coupled to another equipment via wires or antennas. 14EC DEPARTMENT
  15. 15. FACTORS LEADING TO RISK EVENTS • Flammable vapor in fuel tank • Triggering sparks • Improper grounding • Corrosion of wire bundles • High impedance on connectors • High susceptibility of equipment • High level emission of PED’S • Inadequate isolation between antenna • Inadequate separation distance between power wires and sensor wires 15EC DEPARTMENT
  16. 16. IMPACTS Impact occurs at system level as well as component level MAJOR IMPACTS • Fuel tank ignition • Damage flight control surfaces • Disabling of flight control system • Malfunction or permanent damage of sensor 16EC DEPARTMENT
  17. 17. RISK RESOLUTION 17EC DEPARTMENT
  18. 18. Risk resolution steps by creating and examining risk table and risk map 18EC DEPARTMENT
  19. 19. Risk levels are first evaluated and expressed as expected loss. Risk levels of each risk events are examined risk threshold. Risk threshold is unique quantity for each project determined by the stakeholders. 19EC DEPARTMENT
  20. 20. Risk Evaluation And Monitoring Based on Risk Map • Risk status of each risk event is clearly understood with respect to a threshold curve specific to an aircraft. • Risk levels of the risk events that are located below the threshold curve and not to address the risk event but simply monitors the risk level • Pe and Pi should decreases and thus Le also reduces 20EC DEPARTMENT
  21. 21. RISK EVENT PREVENTION PLAN • Risk prevention comes out naturally by examining the risk event drivers carefully. • Inflammable fuel tank by using equipment such as Nitrogen generating system(NGS). • Providing cooling mechanism to prevent sparks, explosion etc. • Corrosion resistant wire bundles. • Redesigning of aircraft windows and alignment. • Maintaining adequate separation distance between equipment. 21EC DEPARTMENT
  22. 22. IMPACT CONTINGENCY PLAN • The concept of redundancy ,error correction coding and software design are utilized to establish the impact contingency plan. • Risk event prevention and impact contingency plan emerge in a systematic manner by examining the risk event drivers and impact drivers. EC DEPARTMENT 22
  23. 23. • Major risk events and impacts for aircraft EM hazards were identified and their drivers have been discussed. • Prevention,plan,monitoring methodology for aircraft EM hazards have been developed.  Future work includes extending the approach to EM design details in aircraft EC DEPARTMENT 23
  24. 24. REFERENCE 1. C.R Paul, Introduction to electromagnetic compatibility 2. B.S Blanchard and W.J Fabryeky.system engineering and analysis fifth edition. 3. Smith and G. M. Merritt. Protective Risk Management EC DEPARTMENT 24
  25. 25. 25EC DEPARTMENT

×