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首页> 外文会议>Sensors for Propulsion Measurement Applications >EMBEDDABLE STRUCTURAL SENSORS FOR SHM OF SOLID ROCKET MOTOR GRAINS
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EMBEDDABLE STRUCTURAL SENSORS FOR SHM OF SOLID ROCKET MOTOR GRAINS

机译：固体火箭发动机颗粒SHM的可嵌入结构传感器

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Structural Health Monitoring is essential in that any event that may compromise the solid rocket motor must be detected. The magnitude, position and time of any imposed event that may damage the propellant grain, bonding system or integrity of the case must be detected and identified for safe operation of the motor. The current embedded sensor technology has been developed to monitor the effect of these events on the propellant grain. Normal bond stress and temperature can be measured using DBST sensors and the output interpreted to confirm integrity. It has been shown that the presences of de-bond and cracks can be determined. Current work is in progress to establish if these embedded sensors can be used to determine position and size of such defects. The stress distribution in a typical propellant grain also has a shear component particularly near the ends and around any flaps, slots or stress relieving devices. This can be the critical stress under certain loads and in complex geometries. Therefore, a recent addition to the range is a sensor to measure shear stress in the same body as the DBST. Motors can be stored for long periods before being used so the sensor system must also be reliable and stable for at least twenty years of operation. Similar sensors stored for ten years have shown little change and tests are being undertaken to establish the confidence that the sensor system will last the life of the motor. This paper will review the recent development and testing of these embeddable sensors, and results to date will be discussed.
机译：结构健康监测至关重要，因为必须检测到可能损害固体火箭发动机的任何事件。必须检测并确定任何可能损坏推进剂颗粒，粘结系统或壳体完整性的事件的大小，位置和时间，以确保电动机的安全运行。目前已开发出嵌入式传感器技术来监视这些事件对推进剂颗粒的影响。可以使用DBST传感器测量正常的粘结应力和温度，并解释输出以确认完整性。已经表明，可以确定脱胶和裂纹的存在。当前的工作是确定这些嵌入式传感器是否可用于确定此类缺陷的位置和大小。典型的推进剂颗粒中的应力分布还具有剪切分量，特别是在端部附近以及任何襟翼，缝隙或应力消除装置周围。在某些载荷下和复杂的几何形状中，这可能是临界应力。因此，该范围最近增加了一种传感器，用于测量与DBST处于同一物体中的剪切应力。电动机在使用前可以长期存放，因此传感器系统还必须在至少二十年的运行中可靠且稳定。存储了十年的类似传感器几乎没有变化，并且正在进行测试以建立对传感器系统将使电机寿命持续的信心。本文将回顾这些嵌入式传感器的最新开发和测试，并讨论迄今为止的结果。

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