Robust Control of a Two-Axis Gimbaled Seeker Using Loop Shaping Design Procedure

A two-axis gimbaled seeker must stabilize the gimbal axis in the inertial plane from the missile body motion disturbances. The missile guidance performance to the aiming target in the terminal homing phase depends significantly on the control performances of a two-axis gimbaled seeker. A two-degree of freedom robust control formulation is suggested for improving the control performances of a two-axis gimbaled seeker. The simulation results confirm the validity of the two-degree of freedom robust control formulation by evaluating several control performances of the two-axis gimbaled seeker. The suggested two-degree of freedom robust controller achieves the best control performances and robust stability among controllers to be introduced for comparison.