Comparison of vibration control schemes for a smart antenna

Two active vibration control schemes, positive position feedback (PPF) and active vibration absorber (AVA), were experimentally implemented with an eight ribbed smart antenna. Mounted on five of the eight ribs are collocated piezoceramic sensor/actuator pairs creating a multi-input multi-output (MIMO) control structure. A single-input single-output (SISO) pole zero model of one of the antenna ribs is identified. The design parameters for the AVA and PPF controllers are numerically optimized from simulations of the SISO model. The design parameters found in the SISO simulations are then implemented in the MIMO structure. Theoretical stability bounds for collocated and non-collocated control for both the PPF and AVA control schemes are also presented.<
>