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首页> 外文会议>18th International Conference on Adaptive Structures and Technologies(ICAST 2007) >Adaptive Mount Approaches for Helicopter Seat Vibration Control
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Adaptive Mount Approaches for Helicopter Seat Vibration Control

机译：用于直升机座椅振动控制的自适应安装方法

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Helicopter aircrews are exposed to high levels of vibration and noise during flight. This paper presents the investigation of adaptive seat mount approaches to reduce vibration on the helicopter seat. A flight test on a helicopter with typical pilot configurations showed that the vibration spectra on the pilot's helmet not only included the dominant N/rev harmonic peaks of the rotor speed, but also consisted of a low frequency resonant peak in the frequency range of human abdominal and spine resonant frequencies. Long-term exposure to this vibration may lead to occupational health issues such as damage to pilot spine and neck. In order to address this issue, a novel adaptive seat mount concept was developed to mitigate the vibration levels transmitted to the aircrew. As a proof-of-concept demonstration, a miniature modal shaker was installed between the cabin floor and the seat bottom as the adaptive mount that provided the actuation authority. The objective was to reduce the vertical vibration transmitted to the aircrew helmet in order to decrease aircrew neck and spine injuries cause by the transmitted vibration. Extensive closed-loop control test have been conducted on a full-scale helicopter seat with a mannequin with varying physical properties. A 10,0001b(f) mechanical shaker was used to provide representative helicopter vibration profiles to the seat. Significant vibration reductions on the N/rev vibration peaks were achieved, and the low frequency resonant peak was also suppressed simultaneously.
机译：直升机机组人员在飞行过程中会遭受很高的振动和噪音。本文介绍了自适应座椅安装方法的研究，以减少直升机座椅上的振动。在具有典型飞行员配置的直升机上进行的飞行测试表明，飞行员头盔上的振动谱不仅包括旋翼速度的主要N / rev谐波峰，而且还包括人体腹部频率范围内的低频共振峰和脊柱共振频率。长期暴露于这种振动下可能会导致职业健康问题，例如飞行员脊椎和颈部受损。为了解决这个问题，开发了新颖的自适应座椅安装概念以减轻传递到机组人员的振动水平。作为概念验证的演示，在驾驶室地板和座椅底部之间安装了一个微型模态振动器，作为提供操纵权的自适应支架。目的是减少传递到机组人员头盔的垂直振动，以减少机组人员因传输的振动而引起的颈部和脊柱受伤。已经在具有各种物理特性的人体模型的全尺寸直升机座椅上进行了广泛的闭环控制测试。使用10,0001b（f）机械振动器向座椅提供代表性的直升机振动曲线。在N / rev振动峰上实现了显着的减振，同时还抑制了低频共振峰。

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