A nonlinear approach to the design of jet engine control systems

This paper uses a multiple time scaling analysis of jet engine dynamics to derive a non-linear minimum time control law. The ideas are based on concepts taken from singular perturbation theory. Further reductions in model order are permitted by this approach, which results in a feedback form for the control solution. Numerical results are given which compare the accuracy of the solution with open-loop solutions obtained using conjugate gradient and dynamic programming methods.