PSet_10

PSet_10 - * d1 . Then use the specific cases: + = + = + = +...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Spring 2003 10.450 Process Dynamics, Operations, and Control Problem Sets - 10 Marlin gives transfer functions for closed loop cascade and feedforward systems. He also gives examples in which numerical simulation was done for disturbance response. Let’s examine how the cascade and feedforward loops respond to the OTHER disturbance, the one that’s not measured. Given this process: x d2 * x m * x d1 * y * G m2 G d2 G d1 G m1 x i * presume that cascade or feedforward loops are placed on disturbance x * d2 . For each scheme, write the general transfer functions for the response of y * to x
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: * d1 . Then use the specific cases: + = + = + = + = + = + = s T K G s T K G s K G s K G s K G s K G i c c i c c m m m m d d d d 2 2 2 1 1 1 2 2 2 1 1 1 2 2 2 1 1 1 1 1 1 1 1 1 1 1 to write the Laplace domain expression for response to a step change in x * d1 . What conclusions can you draw comparing cascade to feedforward? (Of course, you must derive your own feedforward controller transfer function.) 1...
View Full Document

Ask a homework question - tutors are online