The Design of Aircraft Automatic Ride-Smoothing Systems Using Direct-Lift Control

摘要

This report shows how a direct-lift motivator can be used to alleviate the response to vertical turbulence of a rigid, combat-type aircraft. Optimal-control and parameter-optimisation techniques are used to design both 'open' and 'closed' loop control systems. Alternative criteria other than simply reducing the normal acceleration response are discussed. The effects of system nonlinearities such as position and rate limits are explored. Both discrete and continuous models of turbulence are used in the analysis. Some nonlinear control solutions are discussed. (Author)