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Helicopter Manufacturer Tests Blade Performance with Self-Contained Data Collection System

机译：直升机制造商使用独立的数据收集系统测试叶片性能

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Vertical Aviation Technologies has designed a five-bladed helicopter rotor that makes one-third less noise than conventional three-hladed helicopters. To gain FAA approval, Vertical Aviation Technologies had to prove that stresses on the five blades were equal to, or less than, those on a three-bladed system. Our engineers faced the common problem of acquiring data from a rotating object. Rather than using telemetry or slip rings, they attached a SoMat Model 2100 Field Computer System directly to the rotor head. The Model 2100 rotated along with the strain gages on the blades, collecting data unattended during 10-min test flights. Test results showed that individual blades in a five-bladed system experienced 40% lower stresses than blades in the three-bladed system. Substantial reduction in vibration also resulted in changing from a three- to a five-bladed rotor system.
机译：垂直航空技术公司设计了一种五叶片直升机旋翼，其噪音比传统的三刃直升机低三分之一。为了获得FAA的批准，Vertical Aviation Technologies必须证明五个叶片上的应力等于或小于三叶片系统上的应力。我们的工程师面临着从旋转物体获取数据的常见问题。他们没有使用遥测或滑环，而是将SoMat 2100型现场计算机系统直接连接到了转子头上。 2100型与叶片上的应变仪一起旋转，在10分钟的试飞过程中收集了无人看管的数据。测试结果表明，五叶系统中的单个刀片所承受的应力比三叶系统中的刀片低40％。振动的显着降低还导致了从三叶到五叶的转子系统的变化。

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