Optimal controllers for bank-to-turn CLOS guidance

Linear quadratic optimal control theory is applied to the problem of bank-to-turn control in a CLOS guidance system. Both stationary and moving targets are treated, and the trade-off between controller complexity and autopilot realisability examined. The optimality of conventional control ideas is assessed. Finally, simulation results using a practical autopilot model confirm that these new controllers give improved guidance accuracy and reduced susceptibility to pitch-yaw crosscoupling.