physical constant or essentially the same

According to the feedback principle: in order to maintain a , it should be cited in this physical quantity and constant comparison, the formation of closed-loop system. We want to maintain a constant pressure, so pressure must be introduced with a given value of the feedback value compared to the formation of Bop Control System . However, the control system is characterized by non-linear, large inertia of the system, and PID control is now a combination of methods, the pressure fluctuations in the use of fuzzy control, in order to speed up response; a smaller range of pressure used in the PID to maintain static accuracy .

This smart meter can be added by the Rotary Drilling Hose when the algorithm is now, while the PLC is programmed to pump at work to switch between the frequency and frequency. Practice has proved that using this method is feasible and cost is not high. To maintain constant pressure water supply network, based on feedback Theorem in the Waste Water Pumpmanagement as a pressure transmitter installed on the feedback components, as the water supply system piping length, diameter large, pressurized pipe network are slow, so system is a large time delay system, difficult to directly control using PID controller, while the use of PLC in a controlled manner to achieve the regulatory role of the control system.

While the Choke and kill manifold is running at low speed, motor current small. However, when the user's frequent water changes, the motor will be in frequent-liter, spin-down state, and l, deceleration of the current can be slightly more than the motor rated current, causing the motor to overheat. Therefore, the motor thermal protection is required. As for the frequent rise, deceleration and accumulated temperature rise, the inverter of the electronic thermal protection function is difficult to play a protective role, it should be used for motor thermal relay thermal protection.Posted byxu shirleyat7:04 PM

View the Original article