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꼬리날개 없는 곤충모방 날갯짓 초소형 비행체: 현황 및 전망
박훈철,판호앙부,이정호 제어·로봇·시스템학회 2019 제어·로봇·시스템학회 논문지 Vol.25 No.11
This paper provides a review and perspective of an insect-mimicking tailless flapping-wing micro air vehicle (FW-MAV), beginning with identifying key differences between bird-like FW-MAVs and insect-like tailless FW-MAVs. Unlike bird-like FW-MAVs, insect-like FW-MAVs have no control surfaces on a tail; thus, flapping wings must produce flight force and control movement simultaneously. Since the objective of insect-like FW-MAVs is to fly in a nearby area and gather information, they must hover and perform agile maneuvering. In the sense that rotary-wing MAVs (RW-MAVs), also known as multi-rotor drones, can hover, insect-like FW-MAVs and RW-MAVs may have similar mission profiles. Due to the technical difficulty of designing and building a tailless FW-MAV, RW-MAVs are much more popular in the current application of MAVs. However, tailless FW-MAVs have more research challenges than RW-MAVs. Thrust enhancement, efficiency consideration, gust response, noise reduction, and agile maneuverability should be the focus of research on real-world applications of tailless FW-MAVs. The advantages of tailless FW-MAVs over RW-MAVs might be revealed through such research, despite the popularity of RW-MAVs.
박훈철,아디아타마 판지,이호용,Park, Hoon Cheol,Adyatama, Panji,Lee, Ho-Yong 한국세라믹학회 2013 한국세라믹학회지 Vol.50 No.6
Piezoelectric PMN-29PT single crystal multilayer actuators [100 $mm^2$ in cross section and 22 mm in length] are designed and fabricated by stacking square plates [$10{\times}10{\times}0.5(t)\;mm^3$] of PMN-29PT single crystals having a $d_{33}$ of about 1,500 pC/N. The characteristics of PMN-29PT multilayer actuators are compared with those of P-025.40P multilayer PZT ceramic actuators [490 $mm^2$ in cross section and 60 mm in length] produced by PI in Germany. Even though the total volume of the PMN-29PT single crystal multilayer actuator is only about 7.5% of that of the P-025.40P ceramic multilayer actuator, PMN-29PT single crystal multilayer actuators are expected to show very similar properties to P-025.40P ceramic actuators in terms of static stroke and blocking force. Therefore, on the basis of their smaller mass and volume compared to the conventional PZT ceramic multilayer actuators, piezoelectric PMN-29PT single crystal multilayer actuators have significant potential regarding the development of various high performance actuators for aerospace subsystems.