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By operation of the distillation columns you are often interested to maintain output despite fluctuations in the composition, ex. feed composition and feed flow. One possible actuator-variable is here reflux (determined by the reflux ratio) or distillation stream. Modeling of distillation columns dynamic behavior is extensive, but often engineers trying to make simple models for columns dynamics, with parameters determined based on operational data (both static data and step responses). Column Dynamic expected approximately be described by the following transfer functions:
Y(s/D(s) = 2*exp(-20s)/95s+1
Y(s/F(s) = 1*exp(-30s)/2* 60s +1
1. Determine a static feedforward controller
2. Determine a dynamic feedforward controller
3. Determine a PI controller on the use of Direct Synthesis Method (use tau_c = 30)
4. Simulate the closed feedforward controller from 1 and 2nd
5. Repeat (4) using the combined feedforward and feedback loops
6 Which controller gives the best result?
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Air enters the compressor of an ideal air standard Brayton cycle at 100kPa, 250C with a volumetric flow rate of 8m3/s and is compressed to 1000kPa. The temperature at the inlet to
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A cantilever beam of 1800 mm length is subjected to point loads of 3.5 kN, 4.3 kN, 1.2 kN and 2.8 kN at distances of 400 m, 400 m, 400 m 300 m and 300 m, respectively from the fixe
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