Recent content by David J

Write 4 balanced equations for this system Feed F = Top Product (T) + Bottom Product (B) (Equation 1) X-balance 0.6qF=0.99qT + 0.10qB (Equation 2) Y-balance 0.4qF=0.01qT + 0.90qB (Equation 3) Heat Balance Heat in = Heat Out (Equation 4) Identify where any constitutive equations may be...

Good Morning, please remind me of the TMA number for this as its been some time since I completed the study.

Hello Jason This was marked as correct. Its a long time ago now. I had actually submitted this for marking before Jim pointed out about the proportional but thinking back I did ask about this and was told it was not required

Very sorry to hear this

Which question are you looking at? is it 2 (ii) The answer to this is disguised in one of the lessons but I basically answered as below (ii) Identify where any constitutive equations may be required for the modeling process. As per the lesson constitutive equations are used to better...

I submitted my suggestions from post number 11 in this thread and was given a correct answer for it Feed F = Top Product (T) + Bottom Product (B) (Equation 1) X-balance 0.6qF=0.99qT + 0.10qB (Equation 2) Y-balance 0.4qF=0.01qT + 0.90qB...

I struggled with this in the beginning but if you follow all of the posts in this thread the correct method is explained. I used ##T=T\infty+a*e^(\frac{-t}{\tau})## ##T\infty## is the final limit which in the case of this question is 10 ##a## is the difference between ##To## which is 50 and...

Fully understood now, thanks again for your help. I will mark this as solved now

Thanks for your help with this one, its most appreciated. I just have a quick question about this, I have spent this afternoon going through the partial fraction part again, trying to get an understanding of it When I run ##\frac{12}{s^2(4s+1)}## through the partial fraction software it gives...

##u(t)=4t## ##u(s)=4\frac{4}{s^2}## ##y(s)=[\frac{3}{4s+1}]u(s)=[\frac{3}{4s+1}][\frac{4}{s^2}]## ##y(s)=\frac{12}{s^2(4s+1)}## I didn't quite understand how you applied the partial fractions but with the help of a software package I use I managed to get an idea of it. I won't post it on...

I am just looking at this question part (i) Is it not just asking for 4 basic equations Equation 1 Overall balance = Top Product + Bottom product Equation 2 X Balance 0.6F = 0.99T + 0.1 B Equation 3...

I see that mistake, yes. I have removed that first section from this post as I was getting confused with past attempts. ##u(t)=4t## so ##u(s)=\frac{4}{s^2}## The transfer function for this ramped output is ##\frac{4}{s^2}## ##G(s)=\frac{u(s)}{\tau s+1}## = ##\frac{\frac{4}{s^2}}{\tau s +1}##...

Ok here goes for attempt number ? This is taken from my lesson where it explains the partial fraction method. I have posted this to work out if this is the correct way to work out this problem. I think this is what you are relating to. ##u(t)=4t## ##u(s)=4*\frac{1}{s^2} or \frac{4}{s^2}##...

Good Morning I attached a copy of the step response example I was given in my lessons. I thought it was just a case of changing ##\frac{1}{s}## to ##\frac{1}{s^2}## but I am not sure it is so straight forward now. The attachment is good for step response but I am now assuming that as part of...

I am getting slightly confused now as I have followed the lesson for the step function exactly as it is explained, I thought I just needed to change for the ramp function. I had a look at the tables online and it shows the ramp function as I have used. Whilst I dig into this again can you...