“…The second configuration is a cantilevered plate with a fixed leading edge and a free trailing edge, aligned with the flow, referred to as an flag-type configuration. Many researchers have investigated the stability of such systems theoretically [15,11,19,17,35,2,33] and experimentally [31,7,41,40,12,42,29]; a thorough recent survey of the literature on these aspects is performed by Païdoussis [23]. A third configuration which has recently received attention due to potential applications in small scale flutter-based energy harvesting systems, is referred to as inverted-flag-type configuration, or inverted flag; as opposed to the flag-type configuration, the leading edge of the inverted flag is free while the the trailing one is fixed.…”