Acc的顺序抗混叠滤波器是什么？

大家好，
 
 我对LSM9DS1有类似的问题：
 1.加速度ODR选择下降到10 Hz，但带宽选择（可能是抗混叠滤波器）限制为50Hz。因此，当在10Hz或50Hz下以50Hz的带宽选择进行采样时，预期会出现严重的混叠。有没有办法避免这种情况？
 2.没有正确记录加速度数字滤波器操作。 “高分辨率”指的是什么？如何选择LPF或HPF？



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Hi all,

I have similar questions regarding the LSM9DS1:
1. The Acceleration ODR choices go down to 10 Hz, however the bandwidth selection, presumable an anti-aliasing filter, is limited to 50Hz. Thus, when sampling at 10Hz or 50Hz with a bandwidth selection of 50Hz severe aliasing is to be expected. Is there a way to avoid this?
2. The accelerometed digital filter operation is not documented properly. What dow ''high resolution'' refer to? How is LPF or HPF selected?

嗨阿米尔，
 
 
请参阅可从ST网页下载的AN4650应用说明的第2.6章和第2.7章：
 
http://www.st.com/resource/en/application_note/dm00157511.pdf
 
感谢你并致以真诚的问候，
切赫



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Hi Amir,


please refer to the Chapters 2.6 and 2.7 of the AN4650 Application Note downloadable from ST web pages:

http://www.st.com/resource/en/application_note/dm00157511.pdf

Thank you and best regards,
Petr

我没有看到AN4650中的那些章节，或者任何回答问题的章节：抗锯齿滤镜的顺序是什么。我还有一个问题：陀螺抗锯齿滤波器的截止频率和阶数是多少？
担



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I don't see those chapters in AN4650, or anything that answers the questions: what is the order of the antialias filters. I have another question: what is the cutoff frequency and order of the gyro antialias filter?
Dan