微型压电扑旋翼动态特性及气动弹性耦合的增效机理研究

项目名称： 微型压电扑旋翼动态特性及气动弹性耦合的增效机理研究

项目编号： No.11302027

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 贺媛媛

作者单位： 北京理工大学

项目金额： 30万元

中文摘要： 基于仿生概念的扑旋翼研究是发展高效高机动性微型飞行器极有前景的方向之一。本项目针对目前压电扑旋翼研究中存在的扑动幅度和气动力不足、动态特性的影响以及气动效率和高效扑翼运动模式不明确的问题，拟层层递进地开展从压电放大机构到扑旋翼系统的研究。建立并基于实验结果完善研究对象的动力学模型以及电-机和气动效率分析模型，明确系统的关键特征参数包括压电激振形式、翼结构布局与振动模态以及非定常气动特性对扑旋翼动态特性、响应运动模式和幅值的影响，揭示气动弹性耦合效应对扑旋翼增效作用的机理。为确定压电扑旋翼最优运动模式及相应的系统特征参数并有效利用气动弹性效应提高系统效率提供理论依据和分析模型，为发展高效微型飞行器探索有效分析方法和系统模型。

中文关键词： 扑旋翼；微型飞行器；动态特性；拍动模式；压电驱动

英文摘要： The bionics-based flapping wing rotor (FWR) concept is one of the most potential research directions for developing micro aerial vehicles (MAV) of high efficiency and maneuverability. In the current study of piezoelectric FWR MAV, there are number of challenges especially the lack of flapping amplitude and aerodynamic lifting force, unclear influence of dynamic characteristics on the performance, and uncertainty of the aerodynamic efficiency and flapping motion kinematics. To meet those challenges, we propose to carry out a systematic study starting from piezoelectric （PZT）actuation and mechanical amplification to the whole FWR system. The structural and aeroelastic model of the PZT FWR system and its electro-mechanical and aerodynamic efficiency analysis models will be established and validated by experiment. Investigation will include the effect of the FWR system key parameters including the actuation exciting force type, wing structure layout, modal behavior and the unsteady aerodynamic force on the FWR dynamic characteristics, response and motion kinematics. Effort will be made to disclose the mechanism of efficiency enhancement due to FWR aeroelastic effect. The research will provide theoretical base and analytical models to maximize the system efficiency, and determine the desirable motion kinematics and k

英文关键词： Flapping wing rotor；MAV；dynamic characteristics；flapping kinematics of motion；piezoelectric actuation