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Vibration Compensation of Gravity Sensing Inclinometers in Windtunnel Models

机译：风洞模型中重力感应测斜仪的振动补偿

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This paper describes a remarkably simple technique for compensating the output ofgravity sensing inclinometers for bias errors due to centrifugal accelerations. These inclinometers are commonly used in windtunnel models for measuring angle of attach (AOA). The required accuracy is .01 deg, which is no problem under static conditions. However, during wind-on aerodynamic excitation of the vibration modes of the model-balance-sting-support combination cause errors due to centrifugal accelerations which can exceed the required accuracy by one or two orders of magnitude. It is shown in the paper that by including a few extra accelerators in the model, combined with appropriate signal processing, it is possible to compute an accurate compensation in real-time, irrespective of the number of simultaneous modes. The paper includes a theoretical analysis, some results of experimental verification during actual windtunnel testing and a discussion in implementation.

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