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Unknown disturbance estimation for vibration systems using distributed piezoelectric sensors

机译:使用分布式压电传感器的振动系统未知的扰动估计

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摘要

Vibration is usually caused by external disturbances, which may lead to structural damage. Vibrations can be significantly suppressed by taking disturbances into account. However, in many cases disturbances are unknown or difficult to be measured directly. In order to estimate external unknown disturbances, this article develops a proportional-integral (PI) disturbance observer with measurement noises for smart structures using multiple distributed piezoelectric sensors. For simulation purpose, a dynamic finite element model of piezoelectric bonded smart structure is presented. This disturbance observation method is validated by estimating various kinds of unknown disturbances using piezoelectric measurements. Furthermore, the measurement numbers and the position of measurements are investigated.
机译:振动通常由外部干扰引起,这可能导致结构损坏。 通过考虑干扰,可以显着抑制振动。 然而,在许多情况下,扰动是未知的或难以直接测量的。 为了估计外部未知干扰,本文使用多个分布式压电传感器开发具有测量噪声的比例积分(PI)干扰观测器,用于智能结构。 对于仿真目的,提出了一种压电键合智能结构的动态有限元模型。 通过使用压电测量估计各种未知的干扰来验证该干扰观察方法。 此外,研究了测量数和测量的位置。

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