Recent content by axe34

Homework Statement Hello I have a video that is 30 fps according to the video information (when i right click on the file). It is stated that the videos were filmed in slow motion at 1/10 of normal speed. I'm using a standard version of MATLAB to plot points (actual position) on a moving...

The explanations given in the attached document (the first post in this thread) are poor in my opinion. Here is how I interpret it: when the valve closes, it seems to imply that a piezometer at the valve with show height H + ΔH Thus, if we define positive direction to the right, ∑forces on...

Just read the passage again, it says the fluid is frictionless

I hope you are able to see the book page ok on the attachment. When the valve closes, it seems to imply that a piezometer at the valve with show height H + ΔH Thus, if we define positive direction to the right, ∑forces on the fluid in horizontal pipe = m.a (ρgH + ρ0) - (ρg(H+ΔH) + ρ0) =...

Homework Statement I am trying to understand a problem that I made for myself (although this is based on other problems I've encountered). We have a tank (reservoir) 2.9534 m in height and a head loss of 2.88 m from beginning to end; the loss is due to friction etc. There is discharge to...

I've drawn so many diagrams and simply cannot show that delta H = H - Hf!

Hello, please see attached text below - this concerns ''rigid column theory''. When a valve is closed, the pressure rises at the valve; the pressure rises above the reservoir pressure by ΔP with a height increase ΔH above H. When the valve is opened, this right hand pressure will disappear and...

Hello Please see attached page from a textbook. Can someone explain why H = 4f.le.vo^2/2d.g and why delta H is given by the expression in the book? Note that the figure it mentions is on the top of the page. I have tried for days here. Thanks

Homework Statement Hi I am trying a question from an old textbook. I am required to find the transfer function with respect to the input frequency and the output frequency. Homework Equations For a closed-loop TF, then TF = G/(1+GH) but this does not involve additional inputs as in this...

Homework Statement m = 1 kg, l = 1 m, theta 1 and 2 are small I want to work out the natural frequencies (2) of this 2 DOF system through taking torques about the fixed point on the ceiling. I've done it using numerous fixed points and just cannot get the right answer.[/B] Homework...

KpKaGcGp / (n + KpkaGcGp) is the answer supposedly but I don't know how this was derived.

No I do not.

Homework Statement [/B] I need to work out the open loop transfer function of the above. I've drawn it on word so it's not great; the + and - represent a summing junction. Homework Equations Everywhere I read, I find a different definition of open loop transfer function. I see G*H is an oft...

No, it's not a ''school project''. The actuators are irrelevant to this question, but they are a combi of DC's and steppers. Switches are micro switches. Oh how I love the unhelpful responses on this forum. I'm sure if it was a simple ''school'' project then you'd give me a simple ''school''...

Hi I'm undertaking a mechanical project whereby I wish to send an object (crate etc.) to an array of shelf spaces. Each space will have a button, so that when the object is put into the space, the button will be pressed by the weight of the object. So, I want to start from having all shelves...