An actuator (10, 10&prime, 10&Prime) is disclosed. The actuator (10, 10&prime, 10&Prime) is connected to a structural ground (12, 12&prime, 12&Prime) of a forced oscillation technique device (100, 200, 300, 400, 500, 600, 700, 800, 900, 1000). The actuator (10, 10&prime, 10&Prime) includes an electrical power source (16, 16&prime, 16&Prime) a control device (17, 17&prime, 17&Prime) connected to the electrical power source (16, 16&prime, 16&Prime) a first portion (14a, 14a&prime, 14a&Prime) including active material connected to the electrical power source, and a second portion (14b, 14b&prime, 14b&Prime) including non-active, passive material connected to the first portion (14a, 14a&prime, 14a&Prime). The first portion (14a, 14a&prime, 14a&Prime) includes at least one plate-shaped member (18, 18&prime, 18&Prime). The second portion (14b, 14b&prime, 14b&Prime) includes a ring member (24, 24&prime, 24&Prime) connected to and circumscribing a mesh screen (26, 26&prime, 26&Prime). A forced oscillation technique device (100, 200, 300, 400, 500, 600, 700, 800, 900, 1000) is also disclosed.
