This document discusses a future integrated system concept to prevent aircraft loss of control (LOC) accidents. It identifies the main causes of LOC as inappropriate crew response, vehicle impairment, external hazards, spatial disorientation, and mode confusion. It proposes a holistic approach using integrated onboard systems for vehicle health management, flight safety assessment, resilient guidance and control, improved crew interfaces, remote sensing, and validation/verification to assess risks in real-time and provide assistance or automatic recovery under adverse conditions. The control systems included are modeling/simulation, vehicle health management, flight safety management, resilient control, and crew interface systems. It states that if an inappropriate crew response occurred, the flight safety and resilient control systems would detect the risk and mitigate effects

1. Control System In Avionics
Topic:
Future Integrated Systems Concept for Preventing
Aircraft Loss-of-Control (LOC) Accidents
Group Members:
Muhammad Nauman Rafique
12063122-011
Basharat Naeem
12063122-035

2. Future Integrated Systems Concept for
Preventing
Aircraft Loss-of-Control (LOC) Accidents:
 Loss of control remains one of the largest contributors to aircraft fatal
accidents worldwide
 Aircraft loss-of-control accidents are highly complex in that they can result
from numerous contributing factors acting alone or in combination.
 As indicated in the incoming figure, in-flight aircraft loss of control (LOC)
resulted in 22 accidents and a total of 1,991 fatalities during this time
period (1999-2008).

4. Causes of Loss-of-Control (LOC) :
 Inappropriate crew response
 Vehicle impairment ( inappropriate vehicle configuration, contaminated airfoil, and improper
 vehicle loading)
 External hazards
(wind shear, thunderstorms snow and icing conditions etc.,)
 Space disorientation ( poor visibility conditions )
 Mode confusion associated with the cockpit automation, or some other condition

6.  LOC accident ca be prevented if effective intervention strategies can be
developed to avoid/detect adverse vehicle and external hazard conditions
 Due to the complexity of aircraft LOC no single intervention strategy can be
identified to effectively prevent them.

7. Holistic Approach to avoid the
accidents:
 Integrated onboard systems that can assess vehicle health and flight safety
in real-time
 Enable effective mitigation provide assistance or automatic recovery under
bad conditions, and provide effective situational awareness and decision
support to the crew
 Vehicle health management (VHM) systemmust be developed for continually
assessing and predicting the health of the airframe, propulsion system, and
avionics systems in real-time

8.  Flight safety assurance (FSA) system must be developed to provide the
capability of continually assessing and predicting the impact of hazard
conditions on vehicle flight safety, and to provide resilient guidance and
control capabilities under advrese conditions.
 Effective crew-system interface technologies must be developed for
providing improved situational awareness and crew response under off-
nominal conditions.

9.  Remote sensing system must be developed for avoidance of external hazards
and disturbances.
 Validation and verification (V&V) system must be developed for the
comprehensive evaluation of these technologies, and to enable the
identification of system limitations and constraints as well as boundaries
between safe and unsafe operating conditions.

12. Control System Used:
The control systems ( Technologies) included in
this research are comprised of following
technologies:
 Modeling and simulation system
 Vehicle health management system
 Flight safety management system
 Resilient control system
 Crew interface system

13. If an inappropriate crew response did occur ?
Then
1- The flight safety management and
2- Resilient control systems
would immediately detect risk associated with the action (or inaction), and
would mitigate their effects to restore flight safety while preventing a vehicle
upset or damage.

14. Source:
 Christine M. Belcastro NASA Langley Research Center, Hampton, VA, 23681
 Steven R. Jacobson† NASA Dryden Flight Research Center, Edwards, CA, 93523