Nonlinear flight test trajectory controllers for aircraft

Flight test trajectory control systems are designed to enable the pilot to follow complex trajectories for evaluating an aircraft within its known flight envelope and to explore the boundaries of its capabilities. Previous design approaches were based on linearized aircraft models necessitating a large amount of data storage along with gain schedules. In this paper, the synthesis of nonlinear flight test trajectory controllers for a fixed-wing aircraft is described. This approach uses singular perturbation theory and the recently developed theory of prelinearizing transformations. These controllers do not require gain scheduling for satisfactory operation, can be used in arbitrarily nonlinear maneuvers, and are mechanized with a direct, noniterative analytic solution.

[1]  Bernard Etkin,et al.  Dynamics of Atmospheric Flight , 1972 .

[2]  Henry J. Kelley,et al.  Aircraft Maneuver Optimization by Reduced-Order Approximation* *The research was performed in part under Contract NAS 12-656 with NASA Electronics Research Center and Contract F 44620-71-C-0123 with USAF Headquarters, Office of the Assistant Chief of Staff for Studies and Analysis. , 1973 .

[3]  G. Meyer,et al.  A formal structure for advanced automatic flight-control systems , 1975 .

[4]  R. Brockett.  Nonlinear systems and differential geometry , 1976, Proceedings of the IEEE.

[5]  P. Kokotovic,et al.  A decomposition of near-optimum regulators for systems with slow and fast modes , 1976 .

[6]  Joe H. Chow,et al.  Two-time-scale feedback design of a class of nonlinear systems , 1978 .

[7]  G. Meyer,et al.  Total aircraft flight-control system - Balanced open- and closed-loop control with dynamic trim maps , 1979 .

[8]  L. Hunt,et al.  Control of nonlinear time-varying systems , 1981, 1981 20th IEEE Conference on Decision and Control including the Symposium on Adaptive Processes.

[9]  Hassan K. Khalil.  Linear Quadratic Gaussian Estimation and Control of Singularly Perturbed Systems , 1982 .

[10]  E. L. Duke,et al.  Experience with flight test trajectory guidance , 1983 .

[11]  N. Gupta,et al.  Flight test trajectory control analysis , 1983 .

[12]  L. Hunt,et al.  Global transformations of nonlinear systems , 1983 .

[13]  T. Dwyer.  Exact nonlinear control of large angle rotational maneuvers , 1984 .

[14]  George Meyer,et al.  Application of nonlinear transformations to automatic flight control , 1984, Autom..

[15]  R.A. Walker,et al.  Flight Test Trajectory Controller Synthesis with Constrained Eigenstructure Assignment , 1985, 1985 American Control Conference.

[16]  Sahjendra N. Singh.  Control of nearly singular decoupling systems and nonlinear aircraft maneuver , 1988 .

[17]  P. K. A. Menon,et al.  Aircraft flight test trajectory control , 1988 .

[18]  Min-Jea Tahk,et al.  Applications of plant inversion via state feedback to missile autopilot design , 1988, Proceedings of the 27th IEEE Conference on Decision and Control.

[19]  P. K. A. Menon,et al.  Flight-test maneuver modeling and control , 1989 .

[20]  J. V. R. Prasad,et al.  Nonlinear control of a twin-lift helicopter configuration , 1991 .