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首页> 外文期刊>Mechatronics, IEEE/ASME Transactions on >Analytical Harmonic Method for Modeling High-Frequency Oscillation With Applications to Aircraft Piston Pump Vibration Analysis
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Analytical Harmonic Method for Modeling High-Frequency Oscillation With Applications to Aircraft Piston Pump Vibration Analysis

机译：用于对飞机活塞泵振动分析建模高频振荡建模的分析谐波方法

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摘要

Undesired oscillations are often encountered in controlled systems at steady state due to high-frequency (HF) periodic disturbance and/or feedback noises. This article presents a computationally efficient alternative to derive an analytical harmonic model (AHM) that expresses the oscillatory variable as a series of harmonic kernel vectors and a position-independent harmonic amplitude vector for identifying the dominant harmonic components of the undesired effects on the manipulated variables. Illustrated in the context of an aircraft pressure-controlled piston pump (PC-PP) where the pressure feedback pulsations and the torque disturbances from the piston/slipper assemblies lead to HF swash-plate (SP) oscillation at steady state, the AHM and its significance were investigated experimentally on a PC-PP test-rig capable of simultaneously measuring the HF feedback pressure and SP-angle. Good agreements between the experimental and numerical results validate the AHM, and reveal that the HF SP-oscillation is dominated by its fundamental harmonic component, and primarily contributed by the disturbance torque.
机译：由于高频（HF）周期性干扰和/或反馈噪声，在受控系统中常常在受控系统中遇到不期望的振荡。本文介绍了推导出一种分析谐波模型（AHM）的计算上有效的替代方案，该分析谐波模型（AHM）表示振荡变量，作为一系列谐波内核向量和位置无关的谐波幅度向量，用于识别对操纵变量的不期望的效果的主要谐波分量。在飞机压力控制的活塞泵（PC-PP）的上下文中示出，其中压力反馈脉动和来自活塞/拖鞋组件的扭矩干扰导致HF斜纹板（SP）振荡，稳定状态，AHM及其实验在PC-PP试验台上研究了重要性，其能够同时测量HF反馈压力和SP角。实验和数值结果之间的良好协议验证了AHM，并揭示了HF SP振荡由其基本谐波分量主导，主要由干扰扭矩贡献。

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