The Operation Controlling of Agitator using Closed Loop Control System
Keywords:
viscosity estimation, agitator, closed-loop control system, motor torque, substances mixingAbstract
This research was conducted to design, build, and test the efficiency of an agitator using a closed-loop control system. The microcontroller was used as the main control, and it can measure the electrical energy used with the AC Digital Power Energy Meter Module--PZEM-004T. The system of control of the stirrer was studied, and the viscosity was assessed using the basic formula of the rotary viscometer. The constructed agitator can display viscosity in real time. The operation of the machine was based on the principle of motor operation under steady state. When the motor was rotated, a damping torque occurred on the impeller surface, and the resulting torque was proportional to the viscosity of the mixture. The results showed that a closed-loop or feedback control system can keep the mixing speed constant throughout the mixing period. The test of the stirring efficiency of the sample found that when mixed with shampoo in a volume of 10 liters, the constructed machine takes in the production process in the range of 45 to 55 minutes. Compared to using the same volume of commercial mixers, it takes 1 hour and 30 minutes. In addition, the viscosity assessment of the product samples revealed that the viscosity assessment of the shampoo mix had an average percentage tolerance of 0.75% and a maximum tolerance of 3.15% compared to a Brookfield standard viscometer, which had values that were within acceptable standards.
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