A controller is designed for an aircraft to autonomously fly
formation during aerial refueling. Requirements for a refueling
autopilot are stated. A six-degree-offreedom model is developed for
an F-16 lead aircraft and a Learjet LJ-25 wing aircraft. Bare
airframe stability of both aircraft is investigated, and stability
augmentation is performed. A Matlab Simulink simulation is built to
reproduce the sensor inputs that will be available to the wing
aircraft in flight, including disturbances. Control frames are
investigated to determine the optimum presentation of the error
vector for control during the task of air refueling. Control laws
are developed from the initial premise of
proportional-plus-integral control on position error only, and made
more complex until desired performance is achieved. Tanker flight
profiles are designed for the lead aircraft, and simulations are
accomplished to estimate controller performance. Stability and
robustness are investigated through the addition of noise,
turbulence, and time delays while exploring the capability limits
during increasingly aggressive profiles. Modifications for flight
test are described, and flight test results are reviewed from 7
formation flights of a USAF C-12 and a Learjet LJ-25 under fully
autonomous control in an operationally representative refueling
environment. Actual controller performance is analyzed and compared
to predictions, and suggestions are made for future controllers.
General
Imprint: |
Biblioscholar
|
Country of origin: |
United States |
Release date: |
November 2012 |
First published: |
November 2012 |
Authors: |
Steven M. Ross
|
Dimensions: |
246 x 189 x 15mm (L x W x T) |
Format: |
Paperback - Trade
|
Pages: |
284 |
ISBN-13: |
978-1-288-31956-5 |
Categories: |
Books >
Social sciences >
Education >
General
|
LSN: |
1-288-31956-8 |
Barcode: |
9781288319565 |
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