In this paper, active control of flexible structures, e.g., weapon systems, using feedback and feedforward compensation is considered. Specifically, dynamic feedback design utilizing signals from the accelerometer mounted on the structure is discussed. Furthermore, utilization of adaptive input precompensators in conjunction with nonlinear controllers for flexible structures is proposed. The flexible pointing system considered here is the test-bed at the Army Research Development Engineering Center (ARDEC) at Picatinny Arsenal, which ...