Voltage (V) 9 8 7 6 3 2 1 0 0 50 100 150 Open Loop Time (s) -Vq Vh 200 250 300 350 h qin dout Vm Va Vn A Cq Km Ка Kn Figure 4 - Open loop system is the height of the water in the tank is the flow rate into the tank (proportional to the voltage applied to the pump, Vm) is the flow rate out of the tank (dependent on the manual valve position) is the voltage delivered to the motorised variable speed pump is the voltage returned by the flow rate sensor (proportional to the flow rate in, qin) is the voltage returned by the water level sensor (proportional to the water height, h) is the cross sectional area of the tank = 9.35 × 10-³ m² -3 is the linearised flow constant of the manual valve (flow is assumed proportional to h and the characteristic of the valve is linearised) = ?? (cm³/min)/m is the constant of proportionality for the pump = 500 (cm³/min)/V is the constant of proportionality for the flow rate sensor = 0.00227 V/(cm³/min) is the constant of proportionality for the water level sensor = 40 V/m

Voltage (V) 9 8 7 6 3 2 1 0 0 50 100 150 Open Loop Time (s) -Vq Vh 200 250 300 350 h qin dout Vm Va Vn A Cq Km Ка Kn Figure 4 - Open loop system is the height of the water in the tank is the flow rate into the tank (proportional to the voltage applied to the pump, Vm) is the flow rate out of the tank (dependent on the manual valve position) is the voltage delivered to the motorised variable speed pump is the voltage returned by the flow rate sensor (proportional to the flow rate in, qin) is the voltage returned by the water level sensor (proportional to the water height, h) is the cross sectional area of the tank = 9.35 × 10-³ m² -3 is the linearised flow constant of the manual valve (flow is assumed proportional to h and the characteristic of the valve is linearised) = ?? (cm³/min)/m is the constant of proportionality for the pump = 500 (cm³/min)/V is the constant of proportionality for the flow rate sensor = 0.00227 V/(cm³/min) is the constant of proportionality for the water level sensor = 40 V/m

Understanding Motor Controls

4th Edition

ISBN:9781337798686

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter54: The Operational Amplifier

Section: Chapter Questions

Problem 3RQ

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