MATLAB MODEL PREDICTIVE CONTROL TOOLBOX - S Specifikace stáhnout pdf (Strana 122)

4 Designing Controllers Using the Command Line

4-12

figure(2)

plot(tsave,usave(:,3));

title('Coolant Temperature')

CSTR Results and Discussion

The plotted results appear below. Note the following points:

• The setpoint is being ramped from the initial concentration to the desired final value

(see the step-wise changes in the reactor concentration plot below). The reactor

concentration tracks this ramp smoothly with some delay (see the smooth curve), and

settles at the final state with negligible overshoot. The controller works equally well

(and achieves the final concentration more rapidly) for a step-wise setpoint change,

but it makes unrealistically rapid changes in coolant temperature (not shown).

• The final steady state requires a coolant temperature of 305.20 K (see the coolant

temperature plot below). An interesting feature of this nonlinear plant is that if

one starts at the initial steady state (coolant temperature = 298.15 K), stepping

the coolant temperature to 305.20 and holding will not achieve the desired final

concentration of 2. In fact, under this simple strategy the reactor concentration

stabilizes at a final value of 7.88, far from the desired value. A successful controller

must increase the reactor temperature until the reaction “takes off,” after which

it must reduce the coolant temperature to handle the increased heat load. The

relinearization approach provides such a controller (see following plots).

1 2 ... 117 118 119 120 121 122 123 124 125 126 127 ... 165 166

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Fujitsu SCANPARTNER 620C Manual de usuario (26 paginas)

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User's Manual

Table of Contents

1. INTRODUCTION

2. INSTALLATION

SCSI ID Selector

SCSI Termination

3. MAINTENANCE

Feeding Roller

4. TROUBLESHOOTING

ADF Paper Chute

Document

ADF Unit

5. SPECIFICATIONS

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MATLAB MODEL PREDICTIVE CONTROL TOOLBOX - S Specifikace Strana 122

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MATLAB MODEL PREDICTIVE CONTROL TOOLBOX - S Specifikace Strana 122

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