Estimation of Unsteady Aerodynamic Characteristics of Airplanes Using Remotely-Piloted Research Vehicles

本研究的目的是开发一套简单的遥控飞行器（RPRV）飞行实验系统，用于研究飞机的非定常气动特性。为此，进行了以下硬件开发：设计和制造通用的试验台车辆。低动压空气数据传感器的研制。机载数据采集系统、下行系统和地面控制系统的研制。简单光学跟踪器的研制。此外，还开发了以下软件：一种控制飞行实验进程的计算机语言，称为菜单控制语言。利用跟踪器数据分析飞行轨迹和姿态。飞行数据的转换、校正和非量纲化。航迹重建（FPR）分析用直接法辨识气动力和力矩模型。研究表明，利用简单的rprv进行非定常气动特性的研究是非常实用的。此外，一架带有细长三角翼的原型机的飞行测试表明，当与一个简单的滚动减震器结合时，这些飞行器可以作为无动力的RPRV飞行。

The objective of this research was to develop a system of simple RPRV (Remotely-Piloted Research Vehicle) flight experiments to study the unsteady aerodynamic characteristics of airplanes.For this purpose, following hardware developments have been made :A. Design and manufacture of a generic, testbed vehicle.B. Development of airdata sensors that can be used with low dynamic pressure.C. Development of the on-board data acquisition system, the downlink system, and the ground control system.D. Development of simple optical trackers.Also, following software have been developed :A. A computer language for controlling the progress of the flight experiment, called the Menu Control Language.B. Analysis of flight path and attitude using the tracker data.C. Conversion, correction, and nondimensionalization of the flight dataD. FPR (Flight-Path Reconstruction) analysis.E. Identification of models for aerodynamic forces and moments by a direct method.It has been shown that the study of unsteady aerodynamic characteristics using simple RPRVs is quite practical. Moreover, flight tests of a prototype vehicle with slender delta-wings showed that these vehicle can be flown as a powerless RPRV when combined with a simple roll-damper.