Questions tagged [signal-processing]
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0answers
8 views
Probabilities associated to the two-dimensional Markov chain of the Gilbert-Elliot model
I was wondering how you would Show that the probabilities associated to the two-dimensional Markov chain of the Gilbert-Elliot model can be derived as function of the SNR for a Rayleigh fading ...
0
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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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1answer
18 views
classify ECG signal using neural network
I am looking to classify ECG signal using with neural network. I have never done signal analysis before.
From the samples of data I have, I have noramlised, transformed using the FFT , get the pics, ...
0
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1answer
16 views
Operating a load cell below excitation voltage
I currently have this load cell, which has a 10V excitation voltage. However, there is a very nice/convenient load cell amplifier that works with an excitation voltage of 5 VDC.
What are the ...
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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 ...
0
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1answer
59 views
what is 1P frequency in rotor (wind turbine)?
In wind turbine, Is the number of revolution taken in 1s is called 1P frequency? If not, is it possible to find the 1P rpm from rpm measured for 1 hour (that is, I have 60 rpm data points from ...
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0answers
8 views
How to best add an equation to raw data for a combined loading scenario?
I have a crane boom that I have worked out a damping equation for when the boom comes to a stop after rotating (it looks similar to the image below). This represents the force applied at the slew gear ...
1
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1answer
39 views
What are the conditions for a signal to be an energy signal and a power signal?
I know how to find the power and the energy of a signal. What I have a problem with is knowing whether a signal is an energy signal or a power signal.
According to my teacher, a signal is a power ...
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0answers
19 views
Cosine Sum Identity vs In phase and Quadrature
I've come across a problem with my understanding of phasors it seems.
I keep getting two different answers for $\cos(A+B)$. The first method just uses a trig identity and the second with a phasor ...
2
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0answers
21 views
How to control an underactuated platform with a single servo
What's the best way to control the following type of platform so that it remains balanced and upright?
It's a box supported by a single leg that can pivot at the foot (F) and at the hip (H). The foot ...
0
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1answer
47 views
dB/s/Hz in spectrum efficiency
Here is link of research paper in which spectrum efficiency is given in terms of dB/s/Hz. How can we define it?
https://jwcn-eurasipjournals.springeropen.com/articles/10.1186/s13638-016-0792-0
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0answers
15 views
Re-scaling signal intensity in image in relation to their spatial position
Hi I have a 1D radial profile of a sample across a pipe (fig_1). One data point (along the orange straight line) is acquired at each "band" from the image. The resolution (x,y,z) of each data point is ...
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0answers
144 views
How to use VBA on Aspen Hysys? [closed]
I am trying to write a program on Aspen Hysys. Hysys has a script manager to write scripts using Visual Basics for Applications syntax. Having no background in VBA, I'd like some help to:
Import the ...
0
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0answers
30 views
Detecting potholes through Vibrations
To begin with, please excuse my little knowledge, I'm currently a data science student and unfortunately have very little knowledge of physics, engineering, DSP but I am willing to learn.
Currently, ...
1
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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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3answers
73 views
PED or DSP for mechatronic student [closed]
I am doing mechatronics engineering and i am to choose an elective module. We have the choice of taking up Digital Signal Processing or Power Electronics and Drive. Majority of my friends are taking ...
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0answers
23 views
Why does Experimental Modal Analysis need a reference signal?
I need to conduct a vibration experiment with 3 accelerometers for a gear box. I'm reading the theory of mainly how to perform the vibration analysis but I don't understand why EMA needs a reference ...
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2answers
955 views
How to get natural frequencies from accelerometer measurements?
I will be performing some tests and measuring the vibrations of a planetary gearbox. The accelerometer I will be using stays attached to the gearbox and saves the data into a log, which is available ...
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0answers
107 views
How does smartphone VR positioning work? [closed]
I've recently came across Google's cartboard VR headset, which allows you to use your smartphone as a virtual reality device.
The headset basically splits the screen in your left and right eyes, ...
-1
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1answer
50 views
Designing a simple measurement system [closed]
I am trying to get a better understanding of measurements and instrumentation before starting an online class next week. I have been reading a text book and came across a concept question I am stuck ...
2
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1answer
271 views
What happens when very bright coherent light and weaker incoherent background light passes through doubly cascaded diffraction gratings?
Double diffraction is where a light beam passes through an grating with distance D1 between ridges and then passes through an grating with distance D2 The image after passing through diffraction ...
4
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0answers
23 views
Pearson correlation of neural responses with it's linear estimation
I am trying to anderstand the following fact from this article (page 13):
How can single neurons predict behavior
Suppose I have a linear estimation of a stimulus:
$ \hat{s} = \mathbf{w}^T(\mathbf{r} ...
0
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1answer
112 views
Is it possible to make a tunable coherent light filter with 1.8 nanometer bandwidth for visible light?
On January 1991, the esteemed Swedish professor of optics filed a patent titled "Coherence filter", that blocks coherent light regardless of laser light wavelength using destructive interference and ...
5
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2answers
88 views
Finding the sampling period to avoid loss of signal
We have:
$$ s(t) = 4u(t)−u(t−1)−2u(t−2)−2u(t−3.5)+2u(t−4) $$
where $u$ is the Heaviside function.
I had to draw the graph and find the minimum sampling period so we wont have loss of signal. I have ...
1
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1answer
67 views
Are there any methods to work out what appliances are running in my home from an aggregate power consumption sampled 6 times a minute?
I recently got a gizmo installed at home that samples my electricity usage once every 10 seconds. I've become a little transfixed watching the graph update as various appliances in my home turn on and ...
2
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2answers
257 views
Acoustical Design considerations for Active Noise Cancellation Project for Air vent [closed]
I am working on ''Active noise cancellation for air vent'' project. I am using NI myRIO1900 it has FPGA module(Xylinx Z-7010) , Audio Technica ATR 3350 omni directional microphones and Tevion ...
9
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1answer
233 views
Response of a system to a step function (Heaviside function)
I'd like to compute the response to a step function of a electrical/thermal system. Generally I can "easily" compute the transfer function $H$:
$$H(\omega) = \frac{V_{out}(\omega)}{V_{in}(\omega)}$$
...
12
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2answers
321 views
Does a Faraday cage effectively act as a notch filter?
In reading about Faraday cages, I have found that most "real world" designs incorporate multiple layers of mesh. For example, this article from the National High Magnetic Field Lab discusses several ...
5
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3answers
141 views
How can I filter out a signal while extracting only the desired one?
I know that my input signal contains a main sinusoidal signal, and I know its frequency but not its amplitude.
Until now, I have been successfully using the least-squares method to generate a ...
