Abstract
This paper presents the design of pitch channel
autopilot of aircraft using Generalized Predictive Control
with input constraint (CGPC). Due to inconsistent behavior
of pitch plane dynamics, estimation errors in vehicle
parameters and variation of flight conditions, a robust
controller is required to meet the stability constraints. For
this purpose CGPC is proposed, which is a predictive
control technique that explicitly utilizes the transfer
function based mathematical model, to predict the plant
output over a certain prediction horizon. CGPC generates a
set of future control signals in each sampling interval to
optimize the control effort of the controlled system by
minimizing a quadratic cost function. It uses receding
horizon principle in which only the first control signal from
a set of future control signals is implemented. The design
process also considers the constraints for amplitude and
rate of the input control signal. The efficiency of proposed
control scheme for pitch autopilot has been verified by the
simulations conducted using MATLAB. The presented
simulation results show the excellent performance and
capabilities of designed controller which effectively tracks
the desired trajectory.
Uzair Ansari, Syed Minhaj un Nabi Jafri. (2011) Constraint Generalized Predictive Control for Aircraft Pitch Autopilot , Journal of Space Technology , Volume 1, Issue 1.
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