Recent content by Sam Smith

Yes I took this approach taking instantaneous readings. It was correct for some data but not another set. I am hoping to cross check them now so that I can be sure I can always get these values correct

I have data from a pendulum and I am using it to work out the radius of the pendulum. I have acceleration in the x and y directions and so thought this would be easy enough. Simply I determine the (velocity in the x direction)^2/acceleration in the y direction. However when I use python to give...

Well I am thinking more specifically of the rotating frame (I know in the inertial frame the radial acceleration changes direction) (ie fixed on the pendulum bob itself) So if you exclude gravity I am wondering what the acceleration trace would typically look like? Or perhaps its better known as...

I'm just trying to think how I would expect radial acceleration to look like in a pendulum. I would expect a sine wave of sorts but instead of oscillating around zero I would expect it to be around a positive number as this acceleration is always in the same direction. Also if I was to compare...

Just to add to this. I have researched a method known as Type_linear _acceleration but I am having difficult implementing this algorithm

Has anyone got any experience of this using a dual axis sensor on a pendulum? I have attempting to do itt however I am not completely satisfied that my method is successful

Well the original wave is a two sine waves put together each mirroring the other. The dip is in between them so instead of going back to zero the graph dips instead :)

I am carrying out FFT analysis to compare two waves. One looks very much like a sine wave the other has an extra dip occurring at half the frequency of the main wave. I have been thinking around how I might expect this to show up in the FFT analysis. At first i was expecting to see a smaller...

Yes I have measured with a ruler but if everything is working correctly the above equation should give me the correct value but it doesnt. At the moment I have decided to take the value where velocity is at the greatest so I have taken this instaneous value .^2/acceleration at this angle...

I am using that value at various points along the pendulum's path and I am also using the centripedal acceleration at the same points along the pendulum however my values for radius are changing and are not what I would be expecting

Yes what is confusing me is that centripedal acceleration = velocity^2/Radius if you then wnated to use velocity reading in the x direction and centripedal acceleration to find radius ie Velocity^2/centripedal acceleration then the radius would change how can I find the accurate reading for the...

I am curious, when you are swinging your arms back and forth whilst holding a glass of water as you would with a pendulum would it experience centripedal acceleration? I would assume that it would?

In terms of the pendulum oi I ignore the tension of the arm and consider simply the motion if for example I had a robotic arm and it was moving as a pendulum how would I expect it to look

Yes I think you may be write my accelerometer measures acceleration in terms of g. If that's the case have I described hwo I would expect the graph to look correctly.,

Possibly. How would you expect the acceleration curve to look for a ball being thrown and a pendulum? I would like to take a look at a graph so I can work through it but I can't find a simple graph of it. For example on my dual axis how would the vertical and horizontal graphs look?