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The major hardware components, namely: water pump Water tank. Thaeng water. System control circuit open-closing device. Cooling fan temperature sensor level sensor and control the PID through Lab View by it will pump water into thaeng. Water pump is a part of the input (input), which serves the water pump by using the control. When the pump into water, thaeng voltage to the sensor level. The sensors will control the operation of the interface circuit to circuit interface works by going to the control system and control circuit will leave the water to lower the water level in the section software, the system will start with reading the data values from the sensors measure the level, and then send the measure to the value cycle.The input interface. Access to the PID control, which has a first choice with 2 is processed automatically, the program automatically calculates the average minimum error of the Kp, the second is Kd, Ki work by hand instead, automation. The performance test experiment set to Auto adjust set enough. Start at 5cm-14cm, from which the results of the experiment showed that 14 cm. An older brother was born over a specific set of possible tightness tanoi this trial. The first term entered Kp by Ki and Kd constant increment Setpoint high up to be faster, but the feedback that will be occurring over the same tightness tamak! The second input term given Ki Kp and Kd constant can also cause over Shu. The system is a higher Order and may make the system is the result of unsolicited responses. The third input Kd term set to Ki and Kp constant. This term can be reduced as a result of the response over Shu. PID are clear enough to point the set 14 cm Motors because the graph of a PID with minimal Overshoot occurs. In this trial, so it is easier to learn.
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