What do you think of these types of UV diffraction gratings?
http://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=1122
Where can I find them cheaper?
thanks
I will go for diffraction. What type of diffraction do you think is best for one photodiode?
I will try to design the optical stage to get the best signal to noise ratio from the photodiode to get the best measurements. Regarding the photodiode, i will either use one sensitive to uv or else...
Hi,
I am working on my thesis which is going to be uv instrumentation using photodiodes.
I had in mind to extract the UV from the whole solar spectrum at sea level. I know that the UV band is narrow compared to visible and IR. I also wish to experiment with the various components like...
Homework Statement
I have a sixth order system with two complex dominant poles shown in the root locus plot attached. This is done using sisotool. I have requirements of 5% overshot and 1.5sec settling time which I have to satisfy. These are shown as border lines with yello shading on the...
Homework Statement
I have this system (attached) which I need to model using simulink (attached).
Homework Equations
My available variables/constants are: y, y', tita, tita dot, tita double dot, m=0.1, c=0.1, k=300, l=0.3.
I derived the following equations from the free body diagrams;
y =...
I cannot assume this. The system has to remain non linear that is why it will be simulated via simulink. Dont worry, I will not be working any calc with a non linear system.
Do you mean y-y_{o} ? Then how would the differential equation be?
Homework Statement
I have the following difference equation;
y[n] -1.7y[n-1] -0.72y[n-2]=x[n]
with aux conditions; y[-1]=1, y[-2]=-2
input; x[n] = (0.7)^{n}u[n]
I used the recursive method to get 5 consecutive values of the impulse response of the system and also 5 consecutive values of...
I need to investigate some tight control on an open loop modelling of a servo motor linked with a spring mass damper system.
The linkage with spring mass damper is stable with a counterbalance on the other side. The aim is to shift the mass (by the servo) of the s-m-d system and eliminate...
From this mechanical part (attached), I need to derive a differential equation relating mass 'x' position to hinge 'y' position.
\ddot{x}m + b\dot{x} + cx = F
The link l would be rotating. I am confused about considering the displacement of x with reference to y. Would this change the...
You were right on the square root, I will correct it. Please find attached what I have tried so far. There are about 2 full A3, but I wrote down what I thought makes sense.
thanks any help
I am asked to derive a formula from the diagram attached. I should end up with this equation:
f=1/2\pi (k/(M+I/R^2))
I tried really hard relating linear quantities with rotational (T=Fr, T=I*alpha etc.) ones but it was all in vain.
Any help would be really appreciated.
thanks
the thing is that I need to derive an equation to the one given and explain the steps involved, I will try to upload a more clear copy of the question.
Hi folks,
In a tutorial I was given this problem on which I've been trying to solve these last 2 day with non luck. The Problem is attached with a diagram. I tried to take the torque as being T=mg-mR\alpha^{2} but it was all in vein. Any help would be much appreciated
Thanks...