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首页> 外文会议>AHS 59th Annual Forum Proceedings Vol.1 May 6-8, 2003 Phoenix, Arizona >VIBRATION ATTENUATION THROUGH THE USE OF ACTIVE FRAHMS
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VIBRATION ATTENUATION THROUGH THE USE OF ACTIVE FRAHMS

机译：通过使用主动帧进行振动衰减

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摘要

Active vibration control for helicopters is attractive because it provides good performance with lower weight compared to passive alternatives. Their superior performance is attributed to their ability to be adaptive to an ever-changing vibration environment. This paper provides an overview of the active vibration control system (AVCS), also known as active frahm system, developed by Lord Corporation for the Advanced Light Helicopter (ALH) of the Hindustan Aeronautics Limited (HAL). The three stages of the development process used by Lord Corporation are identified and discussed. In the first stage, helicopter transfer functions are obtained and fuselage vibrations at various flight conditions are measured. In the second stage, this data is used to optimize the system by defining the location and force capacity of the actuators (active frahms) and, location of the accelerometer. In the third stage, the AVCS is installed on the helicopter and performance is demonstrated through flight test. This paper also provides the overview of the main components of Lord Corporation's active vibration control technology. Performance of various system configurations developed for the ALH is presented. Accuracy of Lord Corporations analytical capability is demonstrated by comparing the flight test data with the numerical predictions.
机译：直升机的主动振动控制之所以具有吸引力，是因为与被动替代方案相比，它具有重量轻，性能好的特点。它们出色的性能归因于其适应不断变化的振动环境的能力。本文概述了由印度斯坦航空有限公司（HAL）的先进轻型直升机（ALH）的Lord Corporation开发的主动振动控制系统（AVCS），也称为主动frahm系统。确定并讨论了Lord Corporation使用的开发过程的三个阶段。在第一阶段，获得直升机传递函数，并测量各种飞行条件下的机身振动。在第二阶段中，此数据用于通过定义执行器（主动框架）的位置和受力能力以及加速度计的位置来优化系统。第三阶段，将AVCS安装在直升机上，并通过飞行测试演示其性能。本文还概述了Lord Corporation主动振动控制技术的主要组成部分。介绍了为ALH开发的各种系统配置的性能。通过将飞行测试数据与数值预测进行比较，可以证明Lord Corporation分析能力的准确性。

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