Multiple-degree-of-freedom sinusoidal vibration generation based on a hexapod platform

Multiple-degree-of-freedom sinusoidal vibration generation based on a hexapod platform
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基于六足平台的多自由度正弦振动产生

DOI:
10.1177/0959651814552718
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发表时间:
2015-02
影响因子:
1.6
通讯作者:
Li, Weipeng
Li, Weipeng
中科院分区:
计算机科学4区
文献类型:
--
作者:
Wang, Haiqiang;Huang, Hai;Zhang, Ze;Li, Weipeng

文献摘要

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本文提出了一种利用六足平台作为激振器产生多自由度正弦和扫频正弦振动的主动控制策略。与激振器控制器的典型频域控制方法相比,该策略在时域实现,避免了迭代,减少了调整控制信号所需的时间。该策略由两部分组成:首先,基于系统辨识设计了36个有限脉冲响应滤波器,对多输入多输出系统进行补偿;然后采用自适应干扰抵消方法,获得高精度正弦振动。通过扩展所设计的补偿滤波器实现扫描正弦振动的产生。实验验证了该控制策略的有效性。结果表明,时域误差小于1 mg,基本保持在环境噪声水平。
This article presents an active control strategy for generating multiple-degree-of-freedom sine and swept-sine vibration by using a hexapod platform as a shaker. In contrast to the typical frequency domain control approach of shaker controllers, the presented strategy is implemented in time domain, which brings an advantage of avoiding iteration, reducing the time required to adjust control signal. The novel strategy is combined by two parts: first, 36 finite impulse response filters are designed based on system identification, which compensate the multiple-input multiple-output system; then adaptive disturbance cancellation method is used, acquiring high-precision sine vibration. Swept-sine vibration generation is implemented by expanding the designed compensating filters. Experiments were carried out to evaluate the validity of this control strategy. The result showed that the time domain error is less than 1 mg, essentially being kept in the level of environment noise.
DOI: --
发表时间: 2001-09
期刊: --
影响因子: --
作者:
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