Feedforward adaptive control of flexural vibration in a beam using wave amplitudes
Feedforward adaptive control of flexural vibration in a beam using wave amplitudes
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使用波幅对梁弯曲振动进行前馈自适应控制
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
B. Mace
中科院分区：
文献类型：
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作者：
C. Halkyard;B. Mace
本文涉及波幅的实时估计及其随后在梁弯曲振动的自适应主动控制中用作成本函数的用途。通过对传感器阵列的输出进行滤波来估计从控制位置向下游传播的波的幅度。与传统方法相比，最小化波幅具有显着的优势，在传统方法中，某些点的速度被最小化。对于包含远场中的两个传感器的阵列的情况，找到了滤波器的理想频率响应的表达式。这些过滤器是非因果的。描述了使用直接方法和延时方法设计的 FIR 实现，后者提供了一些实质性优点。讨论了实际性能考虑因素，包括滤波器长度、频率范围、近场效应、群延迟、精度和交叉灵敏度。进行模拟和实验测量并进行比较。
This paper concerns the real-time estimation of wave amplitudes and their subsequent use as a cost function in adaptive active control of bending vibrations in a beam. The amplitude of the wave propagating downstream from the control location is estimated by filtering the outputs of an array of sensors. Minimizing this wave amplitude has significant advantages over the more conventional approach in which velocity at some point is minimized. Expressions for the ideal frequency responses of the wave filters are found for the case of an array comprising two sensors in the far field. These filters are non-causal. FIR implementations designed using direct and time-delay methods are described, the latter offering some substantial advantages. Practical performance considerations are discussed, including filter length, frequency range, effects of near fields, group delays, accuracy and cross-sensitivity. Simulations and experimental measurements are performed and compared.