Mastering Block Diagram Reduction: Tips and Techniques | Transfer Function Guide

AI Thread Summary
The discussion focuses on reducing a leapfrog block diagram to find its transfer function. The user is struggling with the leapfrog portions after successfully reducing feedback loops G1 and G4. A suggestion is made to write simultaneous equations for each summing node, similar to using Kirchhoff's Current Law in circuit analysis. There is also a request for a MATLAB example, specifically mentioning the use of the sym function and inquiring about the ode45 function. Overall, the conversation emphasizes techniques for block diagram reduction and MATLAB application.
pnjbi
Messages
6
Reaction score
0
Hi,

I'm having some trouble reducing a leapfrog block diagram shown in the attachment. I want to find the transfer function but I don't know how to reduce the portions which "leapfrog". I can reduce the feedback loops G1 and G4 but not too sure on where to go from there.

Any help is appreciated.
Thanks!
 

Attachments

  • leap_frog_block_diagram.jpg
    leap_frog_block_diagram.jpg
    9.1 KB · Views: 574
Engineering news on Phys.org
Sorry that I'm not much help on this one, but it would seem that you would need to write simultaneous equations for each summing node, and solve the system of equations. Kind of analogous to using the KCL to solve for the behavior of a circuit.
 
Thanks for the response Berkeman.
I think you might be right. Could you show a quick example of how I can proceed using matlab?
I was thinking of using the sym function but I've also been told that I could use ode45 functions (although I'm not familiar with ode45 functions).

Thanks.
 
type "help ode45"
 

Thread 'What happens if shielded cable has short to the shield?'

While I was rolling out a shielded cable, a though came to my mind - what happens to the current flow in the cable if there came a short between the wire and the shield in both ends of the cable? For simplicity, lets assume a 1-wire copper wire wrapped in an aluminum shield. The wire and the shield has the same cross section area. There are insulating material between them, and in both ends there is a short between them. My first thought, the total resistance of the cable would be reduced...
View full post »

Thread 'Underwater piezoelectric sensor array receive sensitivity'

Hi all I have some confusion about piezoelectrical sensors combination. If i have three acoustic piezoelectrical sensors (with same receive sensitivity in dB ref V/1uPa) placed at specific distance, these sensors receive acoustic signal from a sound source placed at far field distance (Plane Wave) and from broadside. I receive output of these sensors through individual preamplifiers, add them through hardware like summer circuit adder or in software after digitization and in this way got an...
View full post »

Thread 'Question about bonding ground and neutral'

I am not an electrical engineering student, but a lowly apprentice electrician. I learn both on the job and also take classes for my apprenticeship. I recently wired my first transformer and I understand that the neutral and ground are bonded together in the transformer or in the service. What I don't understand is, if the neutral is a current carrying conductor, which is then bonded to the ground conductor, why does current only flow back to its source and not on the ground path...
View full post »

Similar threads

Oven controller block diagram, transfer function and temperature calcs
Replies
24
Views
5K
I Pole Identification Using Block Diagram Reduction
Replies
4
Views
4K
Engineering Determine the transfer function of the block diagram
Replies
4
Views
1K
Understanding the PLL Block Diagram & Stable Point of Operation
Replies
3
Views
2K
What is the Well-Known Feedback Expression for Block Diagram Manipulation?
Replies
3
Views
3K
How can I reduce a controller with block reduction and find a transfer function?
Replies
4
Views
2K
Free Body Diagram of Mass-Spring System
Replies
5
Views
1K
PID control and block reduction
Replies
5
Views
2K
Block Diagram Reduction - Control Systems Engineering
Replies
2
Views
7K
Control theory: block diagram, problem (detailed below)
Replies
4
Views
3K

Hot Threads

Recent Insights

Back
Top