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首页> 外文会议>AD-vol.69; American Society of Mechanical Engineers(ASME) International Mechanical Engineering Congress and Exposition; 20041113-19; Anaheim,CA(US) >PZT-ACTUATED IN-FLIGHT DEICING WITH SIMULTANEOUS SHEAR AND IMPULSE FORCES
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PZT-ACTUATED IN-FLIGHT DEICING WITH SIMULTANEOUS SHEAR AND IMPULSE FORCES

机译：PZT驱动的同时具有剪切力和脉冲力的飞行除冰

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摘要

Piezoelectric actuations for simultaneous generation of shear and impulse forces for effective and energy efficient deicing applications are proposed. Aircraft leading edge structures is considered for the analysis. Adhesive shear bond between the ice layer and the substrate, which is more than ten times weaker than the normal bond, is targeted to achieve deicing. Piezoelectric actuators consisting of high normal to shear coupling factor(d15) are considered at the inner surface of the leading edge at the locations where highest amount of ice accretion is occurred. Simultaneous shear and impulse force generation can be achieved with actuators consisting of two sets of electrodes, one arranged in parallel to the poling direction and the other perpendicular to the poling direction to generate shear forces and normal forces respectively. Appropriate piezoelectric material configuration is chosen, so that enough shear forces are generated to weaken the bond of the ice-substrate interface which is weak in shear. Once the shear bond is weakened, applied normal impulses force the ice layer come off the surface. Finite element model of the leading edge structure with ice accretion layer and piezoelectric actuators are constructed. Simulations of the deicing process are performed and the actuator locations, electric charge applied and impulse duration are optimized. This method employs single actuator for both shear and impulse generation and consumes far less power than any existing in-flight deicing methods.
机译：提出了用于同时产生剪切力和脉冲力的压电致动，以用于有效和节能的除冰应用。分析飞机前缘结构。冰层和基材之间的粘合剪切粘结力比普通粘结力弱十倍，目的是实现除冰。压电致动器由高法向剪切耦合系数（d15）组成，被认为是在前缘的内表面处发生了最大的积冰现象。利用由两组电极组成的致动器可以实现同时产生剪切力和脉冲力，一组电极平行于极化方向布置，另一组垂直于极化方向布置，以分别产生剪切力和法向力。选择适当的压电材料配置，以便产生足够的剪切力以削弱抗剪力较弱的冰-基底界面的结合力。一旦剪切力减弱，施加的法向脉冲将迫使冰层脱离表面。建立了具有积冰层和压电致动器的前缘结构的有限元模型。进行除冰过程的仿真，并优化执行机构的位置，施加的电荷和脉冲持续时间。这种方法采用单个致动器来产生剪切力和脉冲，并且比任何现有的机上除冰方法消耗的功率要少得多。

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