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Questions tagged [electronic-filters]

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1answer
31 views

how to filter model-free observations (e.g. Kalman filter)

Before asking a question, I have no background knowledge of engineering. So I have no idea about these issues like control or signal engineering. (Also, I'm not good at using English. sorry for that.) ...
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2answers
67 views

What is a Butterworth filter?

What is a Butterworth filter? I have raw X, Y, Z acceleration sensor data that I need to smooth them from noise. I have read that a Butterworth filter is one of the most appropriate for the specific ...
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0answers
12 views

How do you find the attenuation of a filter?

I've always been told that the filter attenuates at a rate of -20 or -60 per decade past the cutoff frequency or something similar to that based on the order of the filter. But, how do you calculate ...
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0answers
39 views

Question about color filters for a liquid crystal display

I'm not sure if 'engineering' is the right place to post this question. I'm studying how color filters for a liquid crystal display are fabricated. I found a table on the web which compares pros and ...
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2answers
65 views

Filtering Long-duration Signal

I have a long-duration EMG signal (~4 hours long) with a sampling frequency of 1 kHz. If I want to filter the data with a low-pass filter in 10 Hz in MATLAB, should I filter the signal with ...
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0answers
50 views

Measurement of grinding wheel waviness [closed]

I have done experiments on a grinding machine and have collected the data of grinding wheel profile (using a laser sensor). The raw data consists of info on grinding wheel profile, waviness and ...
1
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1answer
1k views

PT1 Filter without Derivative

I am currently integrating a C-Code (written by a third person) in a Simulink model. In the C-Code various sensor signals are filtered, using a PT1 filter with the following equation: $$y(t) = \dfrac{...
3
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0answers
165 views

3D matrix for staggering 5 ten degree wide bands of angle of incidence shifted by target wavelength and optical path difference in arithmetic series

Today, we came up with the idea of creating a 3 dimensional matrix where I simultaneously stagger 3 times 5 times 5 Fabry Perot band-reject interferometeric filters with ten degree wide bands of ...
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3answers
2k views

Is there a mechanical equivalent to a hi/low pass filter (as in electrical engineering)?

I have been wondering if there are certain media (for instance glass, air, foam, etc.) which are peculiar given their chemical composition and/or structure allowing them to filter out mechanical waves ...
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0answers
105 views

Electromagnetic compatibility (EMC) filter and power line filter leakage

I have some questions regarding Electromagnetic compatibility (EMC) filtering and power line filter leakage. What will be the effect of leakage current of power line filter (2A) when both power ...
1
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1answer
270 views

EMC filter selection and installation while there is power line filter leakage current

I am working in telecom company which is willing to install EMC telephone line filters and EMC power line filters on single facility that has all the equipment. I have been reading about filters issue ...