测量了多旋转机无人机系统在悬浮和巡航期间的声音排放的差异)
Jonas Meister1,2, Jonas Jäggi1, Timothy Van Renterghem2
1Empa-Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600 Dübendorf, Switzerland.
The Journal of the Acoustical Society of America
|March 13, 2026
概括
无人驾驶飞行系统 (UAS) 在悬浮和巡航飞行期间产生不同的声音. 空气动力学变化,而不是转子速度,在某些巡航速度时会导致噪声突然增加,影响噪声模型的准确性.
科学领域:
- 声学 声学 在声学方面
- 空气动力学 在空气动力学.
- 无人驾驶飞行系统 (UAS) 无人驾驶飞行系统 (UAS) 是一种无人驾驶飞行系统.
背景情况:
- 了解多旋转机无人机系统 (UAS) 的噪声排放对于它们融入各种环境至关重要.
- 现有的声学模型可能无法准确地反映巡航飞行期间的UAS噪声,这可能导致低估声音水平.
研究的目的:
- 调查和量化多旋转无人机系统中悬浮和巡航飞行状态之间的声音排放差异.
- 为了确定影响飞行模式之间的过渡期间噪声变化的空气动力学因素.
主要方法:
- 在两种不同类型的无人机上进行了车载声学测量,它们具有多个螺旋配置.
- 分析包括固定发射角度的传统声学指标和精神声学参数.
- 用光谱分析来识别空气动力学调节变化.
主要成果:
- 在悬浮状态和巡航状态之间观察到声音排放的显著差异.
- 某些UAS配置显示,在特定巡航速度以上的声音水平增加了4dB.
- 噪音,响度和粗度的突然增加超过了2-4米/秒,与空气动力学转换有关,而不是转子速度.
结论:
- 仅基于悬浮数据的噪音和声化模型可能在巡航条件下不准确.
- 空气动力学因素,特别是刀片-wake/刀片-vortex相互作用,是巡航期间噪音变化的关键驱动因素.
- 为了准确的预测和缓解,需要对不同飞行模式的UAS噪声特征进行进一步研究.
相关概念视频
01:24Absolute Motion Analysis- General Plane Motion
663
Visualize a drone, with its propellers spinning rapidly, hovering mid-air. The fascinating movements and operations of this drone can be comprehended by applying the principle of general plane motion.
As the drone's propellers rotate, an upward force is generated that counteracts the force of gravity, enabling the drone to lift off from the ground. This initial movement of the drone is along a straight path, representing a form of translational motion. In this phase, every point on the...
As the drone's propellers rotate, an upward force is generated that counteracts the force of gravity, enabling the drone to lift off from the ground. This initial movement of the drone is along a straight path, representing a form of translational motion. In this phase, every point on the...
663
01:22Multi-input and Multi-variable systems
455
Cruise control systems in cars are designed as multi-input systems to maintain a driver's desired speed while compensating for external disturbances such as changes in terrain. The block diagram for a cruise control system typically includes two main inputs: the desired speed set by the driver and any external disturbances, such as the incline of the road. By adjusting the engine throttle, the system maintains the vehicle's speed as close to the desired value as possible.
In the absence of...
In the absence of...
455
01:06Forced Oscillations
8.2K
When an oscillator is forced with a periodic driving force, the motion may seem chaotic. The motions of such oscillators are known as transients. After the transients die out, the oscillator reaches a steady state, where the motion is periodic, and the displacement is determined.
8.2K
01:11Buoyancy and Stability for Submerged and Floating Bodies
3.6K
In fluid mechanics, buoyancy and stability are key concepts for understanding the behavior of submerged and floating bodies. When a stationary body is fully or partially submerged in a fluid, the fluid exerts a force on the body known as the buoyant force. This force acts vertically upward through a point called the center of buoyancy, which is the center of the displaced fluid volume. According to Archimedes' principle, the magnitude of the buoyant force is equal to the weight of the fluid...
3.6K
01:12Rocket Propulsion In Empty Space - II
3.6K
The motion of a rocket is governed by the conservation of momentum principle. A rocket's momentum changes by the same amount (with the opposite sign) as the ejected gases. As time goes by, the rocket's mass (which includes the mass of the remaining fuel) continuously decreases, and its velocity increases. Therefore, the principle of conservation of momentum is used to explain the dynamics of a rocket's motion. The ideal rocket equation gives the change in velocity that a rocket...
3.6K
01:13Rocket Propulsion in Empty Space - I
3.9K
The driving force for the motion of any vehicle is friction, but in the case of rocket propulsion in space, the friction force is not present. The motion of a rocket changes its velocity (and hence its momentum) by ejecting burned fuel gases, thus causing it to accelerate in the direction opposite to the velocity of the ejected fuel. In this situation, the mass and velocity of the rocket constantly change along with the total mass of ejected gases. Due to conservation of momentum, the...
3.9K