Resource for wind tunnel tests of smart helicopter rotorblade system

直升机不能更广泛地使用，因为旋翼机产生的外部噪音和振动水平很高。直升机旋翼的非定常气动力是直升机噪声和振动的主要来源。低频振动主要是由后退叶片中的动态失速产生的，而高频噪声主要是在机动和下降飞行状态下，当转子叶片与前叶片尖端脱落的涡流相互作用时产生的。旋翼机领域的最新研究集中在开发集成主动控制系统，以执行更有效的控制旋翼桨叶产生的噪声和振动。在过去，由于缺乏能够承受表征直升机旋翼环境的载荷的致动器，这些系统不能被开发。在实现有效控制的新解决方案中，那些涉及固态致动器-“智能”-或自适应结构的解决方案是最有前途的。最近在欧洲和美国进行的实验表明，噪音和振动只能同时减少很少，尽管有报告说每一个都有显着的减少。2005年6月，一家主要制造商首次成功地飞行了带有主动旋翼桨叶系统的旋翼。由NSERC和MMO资助的卡尔顿大学成功地吸引了另一家欧洲主要制造商的注意，并将于2007年有机会在意大利的风洞试验中展示一种独特的“智能”直升机桨叶系统概念，其目标是首次同时衰减噪音和振动。所要求的设备（一套六个特殊的高电流放大器）将允许在计划的风洞试验中全面验证这种新颖的和完全加拿大的概念，并保持工业合作伙伴的支持，目标是在未来几年内进行全面的飞行试验。

Helicopters cannot be used more extensively due to the high levels of exterior noise and vibration generated by rotorcraft. The most important components of noise and vibration produced in helicopters are originated in the main rotor from the unsteady aerodynamics. Low-frequency vibration is mostly generated by dynamic stall in the retreating blades, whereas high-frequency acoustic noise is produced mainly in manoeuvring and descent flight regimes when the rotor blades interact with the vortices shed by the tips of the preceding blades. The state-of-the-art research in the area of rotorcraft is focused in developing integrated active control systems to perform more efficient control of noise and vibration produced by rotorblades. In the past, these systems could not be developed due to the lack of actuators able to withstand the loads that characterize the helicopter rotor environment. Among the new solutions to achieve efficient control, those that involve solid-state actuators - the "smart" - or adaptive structures are the most promising. Recent experiments performed in Europe and the United States indicated that both noise and vibration could only be reduced marginally at the same time, although significant reductions of each individually were reported. One of the major manufacturers has successfully flown for the first time a rotor with an active rotorblade system in June 2005. Carleton University funded by NSERC and MMO managed to attract the attention of another major European manufacturer and will have the opportunity in 2007 to demonstrate in wind tunnel tests in Italy a unique concept developed in-house for a "smart" helicopter blade system with the objective of attenuating noise and vibration simultaneously for the first time. The requested equipment (a set of six special high-current amplifiers) will allow the full validation of this novel and totally Canadian concept in the planned wind tunnel tests and keep the support of the industrial partner, aiming at full-scale flight tests within the next few years.