Multivariable Closed-Loop Analysis and Flight Control Synthesis for Air-to-Air Tracking

摘要

A synthesis method based on optimal control techniques, closed-loop task-oriented design objectives, and an optimal control model of the human pilot was applied to augment the system dynamics in the air-to-air tracking task. Single and multi-axis analyses were performed. Single axis results, obtained for longitudinal pitch tracking with different sets of active sight display dynamics, indicate the optimum system dynamics were affected by numerator (or display) dynamics. Improved tracking performance was predicted, and the trends in augmented system dynamics (eigenvalues) were shown to agree with previous results. Moving-base simulation results obtained for a highly-banked flight condition were also used to establish a new multi-axis pilot model. This model is considered suitable for simultaneous control of the dynamically interacting longitudinal and lateral-directional axes of the vehicle/display system. The system augmentation, based on this model, again was predicted to significantly improve performance. The trends in system eigenvalues for various augmentation levels showed good agreement with the above longitudinal results. However, the lateral-directional axis was found to be much more important, and significant modification of the dynamics were predicted to lead to system improvements. (Author)