SDN controller is the core of SDN network and one of the key factors to determine the efficiency of SDN network.The main way for SDN controller to manage network is to deal with all kinds of messages sent by switching devices, so how to deal with messages efficiently becomes the key to design SDN controller.Based

DCS field controller based on Programmable Logic Controller (PLC) principle adopts dual-core redundancy fault-tolerant technology. When a single fault or random error occurs, the field controller can automatically correct the error and realize continuous and uninterrupted control. The controller also integrates powerful redundant bus network and high-speed operation function of PLC. The HPLC programming tool

Bluemix is IBM’s Cloud Foundry-style platform as a service based on SoftLayer, which adds Continuous Delivery and places IT personnel at the center of the ability to configure and view custom and pre-configure toolsets to help develop and operate. For example, the example toolchain might support GitHub as a code repository and problem tracker, Orion

At present, with the continuous improvement of people’s quality of life, thermostatic element people also put forward more requirements for the control of household appliances. This paper mainly makes a comprehensive analysis and Research on the design of remote controller for household appliances, and puts forward the following contents on this basis, hoping to provide

A micro Four-rotor flight controller is designed by using the inertial sensor MPU6050 and STM32 microcontroller. The attitude of the aircraft is controlled by double closed-loop PID. The system is stable and has strong anti-jamming ability. Micro-quadruple-rotor aircraft not only has the advantages of small size, simple structure and low cost, but also can take

According to the test requirements of a missile rudder controller component and its components, an automatic test system based on virtual instrument technology is designed. The hardware part is composed of industrial computer, power supply, measuring instrument and regulating circuit. The industrial computer is used to collect and analyze data and control the measuring instrument

For a class of large time-delay and time-varying systems, this paper mainly puts forward the basic theoretical knowledge of fuzzy control in variable universe, and analyses the means of adaptive fuzzy PID controller control. Relevant researchers organically combine the advantages of conventional fuzzy IPD controller and relevant variable universe fuzzy controller. Up to now, using

In order to meet the requirements of the times, Shandong Vocational and Technical College of Labor has carried out a systematic curriculum reform of programmable controller technology based on working process. Four typical projects about programmable controller technology are selected. Each project is divided into four steps based on the working process. The relevant theoretical

Fracturing truck is an important engineering vehicle in oil field, which can complete the work of fracturing stimulation. Fracturing truck mainly consists of chassis, platform engine, gearbox and high-pressure pump. Combining with the actual use of fracturing truck, the transmission shift control is optimized, and the fuzzy control design is adopted to improve the overall

As a part of the nuclear power feed water system, the normal operation of the feed water pump speed control system is of great significance to the safe operation of the entire nuclear power plant. 　　The excellent speed controller of the cooling feed water pump in the nuclear power plant is of great significance to