Block Diagram Reduction - Control System

Topic: Engineering
Thread starter ldlchds
Start date May 17, 2020
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Block Block diagram Control Control system Diagram Reduction System

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3 replies · 3K views · last reply May 17, 2020

ldlchds

Thread starter
May 17, 2020

Homework Statement: Reduce the block diagram to the canonical form:

Relevant Equations: Am I moving right? I am not sure. Do you have any idea how should I do?

Block diagram of a position-control system with a sensor K_s, preamp K, power amplifier K_1 and 1/(R_a + L_a s), torque gain K_t, 1/(J_s s + B_t) load, 1/s and gear ratio N, plus back-EMF K_b, current feedback K_2 and tachometer feedback K_t.

Hand-annotated control system block diagram: R(s) enters a summing junction, then G1(s), G2(s), a third summing junction, and a block labelled G3.G4.G5.G6 over 1 + G4.G5.G6.H2, then G7(s), G8(s), output Y(s). Feedback paths include H3(s), H4(s) and H1 over G5.G6.

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cnh1995

Homework Helper

Gold Member

May 17, 2020

You are on the right track.
You are now left with three feedback loops in the diagram. Reduce them one by one, starting from the rightmost summing point.

ldlchds

May 17, 2020

Okay, delete please this post.I solved.Thanks

berkeman

Admin

May 17, 2020

ldlchds said:

Okay, delete please this post.I solved.Thanks

LOL, no. That's not how the PF works. This is not "cheating.com"

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Block Diagram Reduction - Control System

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