Recent content by Cyclops

Electricity is a very broad topic. However, the fundamental thing to remember is that it is an electro-magnetic wave - i.e. it travels quickly. Energy is transferred from point a to point b by this electro-magnetic wave. For electricity to travel there must be a ring or circuit. This is because...

Dear Trambolin, After a couple of hours work this weekend and another go at it this morning I have come up with some sort of MATLAB state space model which will give the same output as the MATLAB integro-differential model. Thanks for your help as it always helps to have someone to work off...

Dear Trambolin, I have shown all my workings for the equations on a document herein inclosed. Your state space equations create two first order equations from a second order equation. Using the state variables as inductor current and capacitor voltage should also be correct because as far as...

Dear trambolin, Using your equations, the state variable x2 is the inductor current in the circuit. I am trying to use integrators to solve the first order differential equation represented by the bottom line of your state space equation. This does not seem to work as it gives a different...

Dear trambolin, How do you implement the observation of the current in Matlab using integrators for the state space equation. The result should be the same as for the first circuit First circuit.mdl which observes the current by solving directly from the integro-differential equation. When I...

Dear Trambolin, I am trying to obtain the circuit circuit by both methods. The two outcomes should be the same in MATLAB and they are not. The state variable for circuit current is x1 in my working out shown in PDF. I enclose a zip file with two simulink files and a pdf which shows my...

Hello, I enclose a jpeg of the circuit and two simulink jpeg files. The first mdl file - First Test circuit sucessfully models the circuit. The second one where I attempt to model the circuit from its state space equation does not. Can anyone help me to create a correct state space model...

This question seems to bring us to all sorts of issues on generation of electricity. For any electricity to flow there must be a ring from the source and back to the source. In the middle is a load which the source 'sees' as resistance. The return wire does not have to be at 0 Volts but there...

EnumaElish - it was just the way the assignment was written. The solution of the problem is straightforward - just plug in the values to the lagrange equation. My concern was how to imagine the solution space of the problem. I have found a book which in effect states that the solution space is...

The F is just to state that it is function. F1(P1) means the function of P1

Your question I believe is about voltage and current. Kirchoff law states that the sum of currents going into and from a point/node is zero. The current flowing to the load and away from the load will be completely the same. However loads consume power so if the current is the same then the...

Where is the current coming from. Generators - at the moment burners - burn something - heat water and make steam to turn a turbine around. A magnet moving next to a wire induces current.The energy from the steam is turned into electricity by this simple movement.We transform mechanical energy...

I am trying to minimise P1, P2,P3. F1&F2&F3 are cost functions. P1, P2 and P3 must be within the limits above and they must add up to 850. The question set is a lagrangrian multiplier question for generation despatch. What I question is, to visualize this problem - does each function have its...

I am not sure how to visualize the following three equations F1(P1)= 561 + 7.92 P1+ 0.00156 P1^2F2(P2)= 310 + 7.85 P2 + 0.00194 P2^2F3(P3) = 78 + 7.97 P3 + 0.00482P3^2 150 <= P1 <= 600 100 <= P2 <= 400 50 <= P3 <=200 P1+P2+P3 = 850 This is an optimisation problem with limits. Do I...