Development Of Hardware In The Loop Real-time Simulation Platform For Continuous Stirred Tank Reactor

Continuous stirred tank reactors are widely used in chemical,pharmaceutical,fermentation and other fields as an important equipment for chemical production.On account of the reaction process often involves high temperature,high pressure and toxic and hazardous substances,the new control technology and control scheme cannot be directly applied to the system before it is verified.Otherwise,equipment damage or even casualties may occur due to immature technology or operational errors.In order to enhance the safety of the experiment,reduce the experimental cost,overcome the abstraction of the whole digital simulation,and improve the realism of the operator's operation,this topic is based on the Hardware in the loop simulation technology,and independently designed a set of hardware for continuous stirring tank reactor in real-time simulation platform.On the basis of in-depth analysis of the requirements of the hardware in the loop simulation platform,the overall design scheme of the platform is proposed at first.That is to say,the dangerous process response is realized by a digital simulation server,and the actual operating devices(such as switches,PLC,Regulating valve,touch screen,etc.)are added to the platform in the form of physical ontology.In this paper,we briefly introduced the structure and process flow of continuous stirred tank reactor,systematically analyzed the working principle of the reactor.At the same time,taking the actual chemical reaction as an example,according to the established non-linear differential equation of the reactor,using MATLAB/Simulink to build the digital simulation system(server).Through the multi-functional rapid development environment Quarc and Q4 data acquisition card.Realized real-time communication between digital simulation system and peripheral hardware.Secondly,introduced the hardware and software of the monitoring system.The functions of real-time acquisition,real-time monitoring and data archiving are realized.Finally,we successfully validate a typical advanced control algorithm-the fuzzy control algorithm is validated on the real-time simulation platform.Then,according to the Monitor System,all digital simulation system,peripheral hardware the electrical signal does not match the problem,we design the signal conditioning module,ensured the communication barrier between the three.In view of the shortcomings of the pointer look-up table method,according to the fuzzy rules and fuzzy reasoning,the ladder diagram is used to realize the fuzzy control algorithm in Step7.The experimental results show that the self-developed hardware in the loop simulation platform works well and can simulate the process of the reactor well.At the same time,the actual physical ontology added in the simulation loop can truly restore the actual operating environment and give people a sense of reality,and the platform can effectively verify the real-time performance of the controller.Besides,because of the implementation process of the controller and control algorithm in the simulation system is consistent with the real system,the related control technology can be easily transplanted from the simulation system to the actual project,greatly improving the efficiency of the development of the control system,so it can be used as the development platform of the control technology and control scheme.