An Instrumentation System Applied To Formation Flight Kiriti Rambhatla Thayalan Selvam Kelvin Ratnayake Viveknanthan Suganthan
Feb 25, 2016
An Instrumentation System Applied To Formation Flight
Kiriti RambhatlaThayalan SelvamKelvin Ratnayake
Viveknanthan Suganthan
References • 1) I.D Hummel, “The use of aircraft wakes to achieve
power reductions in formation flight”, presented at the advisory group of Aerospace Research & Development.
• 2)D.F Chichka and JL Speyer, “Solar-powered, formation-enhanced aerial vehicle systems for sustained endurance”,in Proc.Amer.Contr.Conf.
• 3) R.J Ray , B.R. Cobleigh, M.J. Vachon,and C.J St, Flight test techniques used to evaluate performance benefits during formation flight, NASA Dryden research centre.
• 4)www.nasa.gov• 5)www.site.uottawa.ca/~misbah/elg4392/index.html
What Is Formation Flight
Applications Of Formation Flights
Ground Based Systems
• Previously the information from the formation flight would reach ground based instruments and then to the flights back again .
• This lead to a number of accidents and failures in formations flights , hence NASA came up with an Instrumentation System called the Formation Flight Instrumentation System (FFIS).
• FFIS makes use of GPS , Extended Kalman filter and an interface .
BLOCK DIAGRAM FFIS
Extended KALMAN FILTER• The Kalman Filter is a recursive filter which
estimates the state of a dynamic system from a series of incomplete and noisy measurements.
• In this project an extended KALMAN filter is used along with GPS( FFIS) to eliminate the need for ground based systems information flight.
• We used MATLAB to simulate the results for the filter to estimate position, velocity and attitude of the next aircraft.
EXTENDED KALMAN FILTER EQUATIONS
Simulation Results
SIMULATIONS WITHOUT FILTER
0 1 2 3 4 5 6 7 8 9 100
0.5
1
1.5
2
2.5
3
3.5True angle
Time in Seconds
Rad
ians
0 1 2 3 4 5 6 7 8 9 10-2
-1.5
-1
-0.5
0
0.5
1
1.5
2Compass Measurement
Time in Seconds
Rad
ians
0 1 2 3 4 5 6 7 8 9 10-2
-1.5
-1
-0.5
0
0.5
1
1.5
2Tangential Accelerometer Measurement
Time in Seconds
Rad
ians
/Sec
2
SIMULATIONS WITH KALMAN FILTER
0 1 2 3 4 5 6 7 8 9 10-0.5
0
0.5
1
1.5
2
2.5
3
3.5Estimation of Angular position
Time in Seconds
Rad
ians
0 1 2 3 4 5 6 7 8 9 10-0.5
0
0.5
1
1.5
2
2.5
3
3.5 Estimation of Angular Velocity
Time in Seconds
Rad
ians
/sec
0 1 2 3 4 5 6 7 8 9 10-2
-1.5
-1
-0.5
0
0.5
1
1.5
2Estimation of Angular Acceleration
Time in Seconds
Rad
ians
/sec
2
STATE SPACE EQUATION FOR AIRCRAFT
BODY CO ORDINATE FRAME FOR AN AIRCRAFT
ANGLES OF OPERATION
SIMULINK MODEL OF AIRCRAFT (NON LINEAR SYSTEM)
PLOTS
THANK YOU
• Questions