# Greg

### How to focus during online classes?

Hello,

I have been finding that during online classes, I tend to lose focus and become sidetracked with other distractions. I was hoping someone could give me some tips or advice on how to stay focused. Anything helps

Thanks

1 AnswerOther - Education1 week ago### Controls Homework Question?

Consider the system with the transfer function

G(s) = 4/(s^2+ (1 +α)s+ 4)

(a) For what range of α is the system is over-damped?

(b) For what range of α is the system is under-damped?

(c) What range ofαwill result in the system’s response having a time constant of 1second?

Need help with this problem, anything helps, Thanks

Engineering11 months ago### Control Systems Hw question?

Consider the system with the transfer function

G(s) = 4/(s^2+ (1 +α)s+ 4)

(a) For what range of α is the system is over-damped?

(b) For what range of α is the system is under-damped?

(c) What range ofαwill result in the system’s response having a time constant of 1second?

Need help with this problem, anything helps, Thanks

1 AnswerEngineering11 months ago### Electronics HW question?

During the day, the ac line voltage changes. This causes the unregulated 24-V output of the power supply to vary from 21.5 to 25 V. If the zener resistance is 14 V, what is the voltage change over the foregoing range?

can you please explain the steps to solving this as I could not find an example in the book and my professor didn't explain how to do this problem

anything helps, thank you

4 AnswersEngineering11 months ago### inverse Laplace transformation with matlab?

Calculate the inverse Laplace Transform of the following rational transfer function?(You need to use partial fraction expansion - MATLAB residue function can be used.)

F(s)= 5/(s^2-s-6)

so i plugged the formula above into Matlab and got r= 1 -1 p= 3 -2 and k = [ ], but I am a little confused on where to go from there

anything helps

1 AnswerMathematics12 months ago### Hw Question-Laplace Transformation?

Calculate the Laplace Transform of the following time functions (u(t) is the unit step input)? Please use Laplace transform table.

f(t)=5u(t)+3e^-2t

1 AnswerMathematics12 months ago### Control Systems HW question?

Please refer to picture, I don't understand this problem (with the exception of a), and would like an explanation of work/answer, anything helps!

(b) Using the equation above, find the transfer function from the input voltage vi(t)and the current i(t);

i.e. find I(s)/Vi(s).

(c) Assume that vi(t) = 0 for t >0 and i(0) =/= 0 . Does i(t) tend to zero as t→∞? Justify.

1 AnswerEngineering1 year ago### A control system described by a differential equation?

A system is described by the differential equation

y^(4)+y^(3)+ 5y^(2)+ 7y^(1)+y=u^(3)+ 2u^(2)+ 3u^(1)+ 7u.

Find the transfer function Y(s)/U(s) (Assume zero initial conditions).

2 AnswersMathematics1 year ago