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Optimal placement of triaxial accelerometers for modal vibration tests

机译:用于模态振动测试的三轴加速度计的最佳放置

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Proper pretest planning is a vital component of any successful vibration test. An extremely important part of the pretest exercise is the placement of sensors, usually in the form of accelerometers. The accelerometers must be placed such that all of the important dynamic information is obtained during the course of the test. The resulting sensor configuration must be optimal in some sense such that test resources are conserved. The state-of-the-practice is to select individual sensor location/directions from a candidate set based upon one of several available criteria. Triaxial accelerometers are then placed at the corresponding locations. In general, this results in the non-optimal placement of many of the accelerometers. This paper presents a new technique, based upon Effective Independence, that places triaxial accelerometers as single units in an optimal fashion. The technique is applied and compared with standard approaches using the X-33 vehicle.
机译:正确的预测试计划是任何成功的振动测试的重要组成部分。预测试练习中极为重要的部分是传感器的放置,通常以加速度计的形式。必须放置加速度计,以便在测试过程中获得所有重要的动态信息。在某种意义上,最终的传感器配置必须是最佳的,以便节省测试资源。实践状态是基于几种可用标准之一从候选集中选择各个传感器的位置/方向。然后将三轴加速度计放置在相应的位置。通常,这导致许多加速度计的非最佳放置。本文提出了一种基于有效独立性的新技术,该技术以最佳方式将三轴加速度计作为单个单元放置。该技术已应用,并与使用X-33车辆的标准方法进行了比较。

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