Optimal disturbance rejection in missile autopilot design using projective controls

A projective controls approach is used to design a normal acceleration command missile autopilot. Projective controls are used to retain the eigenstructure of an H/sup infinity / optimal state feedback controller using a low-order output feedback compensator, but retaining the performance, robustness, and disturbance attenuation properties of the state feedback design. A free parameter matrix used in the projective control design is optimized to minimize the Frobenius-Hankel norm of the error dynamics between the optimal state feedback reference solution and the projective control. >

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