REG: Equipment to Modernize a Subsonic Wind Tunnel for Gust Simulation and Measurment

REG：用于阵风模拟和测量的亚音速风洞现代化设备

• 批准号: 9212953
• 负责人: Earl Dowell
• 金额: $ 1.95万
• 依托单位: Duke University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-09-01 至 1994-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9212953&HistoricalAwards=false
• 关键词: REG; Equipment; Modernize; Subsonic; Wind

A subsonic wind tunnel for gust simulation and measurement will be modified and regimented with a new control system. The gust generator employed is a novel device based upon a recently patented concept, the rotation slotted cylinder. The control system and equipment will have wide applications for nonlinear aeroelastic investigations for aircraft and rotorcraft, especially for the application of aerodynamic feedback techniques to reduce aircraft and rotorcraft response. There is also the potential for the use of this gust generator and associated control system to provide a novel and improve aerodynamic or wind excitation source for scaled models of bridges and buildings. By means of a wind-tunnel gust generator, the harmonic components of aerodynamic loads acting on a rotating blade can be simulated on a non-rotating blade model. Higher harmonic control (HHC) concepts for reducing blade vibration response can therefore be investigated using the gust generator to produce aerodynamic excitation of the model at specified harmonics of a rotor blade system. The rotor blade model feedback control system will be based either on a PC-based controller similar to that planned for the gust generator system or on a simple analog feedback controller. Regardless of the controller, the system software will provide the ability to enter a simple control law algorithm or coefficients.*** //

用于阵风模拟和测量的亚音速风洞将使用新的控制系统进行修改和管理。所采用的阵风发生器是一种基于最近获得专利的概念（旋转开槽气缸）的新颖装置。该控制系统和设备将广泛应用于飞机和旋翼飞机的非线性气动弹性研究，特别是应用气动反馈技术来降低飞机和旋翼飞机的响应。使用这种阵风发生器和相关控制系统还有可能为桥梁和建筑物的比例模型提供新颖且改进的空气动力学或风激励源。借助风洞阵风发生器，可以在非旋转叶片模型上模拟作用在旋转叶片上的空气动力载荷的谐波分量。因此，可以使用阵风发生器来研究用于减少叶片振动响应的高次谐波控制 (HHC) 概念，以在转子叶片系统的指定谐波下产生模型的气动激励。转子叶片模型反馈控制系统将基于类似于阵风发电机系统的基于 PC 的控制器，或者基于简单的模拟反馈控制器。无论使用何种控制器，系统软件都将提供输入简单控制律算法或系数的能力。*** //