closed-loop_response

closed-loop_response - Closed-Loop Response 1 2 3 4 5 6 7...

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Closed-Loop Response 1. Introduction 2. Liquid level control system 3. Proportional control for setpoint change 4. Proportional control for disturbance change 5. PI control for disturbance change 6. PI control for integrating process 7. Simulink example
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Introduction Block diagrams » Convenient tool to represent closed-loop systems Closed-loop transfer functions » Derived directly from block diagram » Convenient tool to compute closed-loop responses and analyze closed-loop stability Closed-loop response » Dynamic response of the controlled output y ( t ) to a change in the setpoint y sp ( t ) or the disturbance input d (t) » Can be computed from the closed-loop transfer function by inverse Laplace transform
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Liquid Level Control System Control objective » Drive level ( h ) to setpoint ( h sp ) by manipulating the flow rate ( q 2 ) despite disturbances in the other flow rate ( q 1 ) Transfer function model [ ] RA R K s Q s Q s K s H R h A q A q dt dh q q q dt Ah d p p R h q = = + + = - + = - + = = τ τ ρ
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