Design Of Network Control System Of Engin VVT Manufacturing Workshop

Facing the trend of global network industrial manufacturing, network controltechnology is more and more used in industrial manufacturing applications, and theconstant development of Ethernet and field bus technology, network has been appliedmore widely in the workshop.Because the manufacturing division is complex, thedifferent manufacturing process and different objects need to adopt different measuresto optimize manufacturing methods and improve manufacturing efficiency.This paper is based on the VVT system production workshop of a company inNingbo, a detailed analysis of the VVT system in the OCV valve and actuatorproduction process, the workshop is divided into three parts,there are monitoringequipment,production line, test line. According to the requirement of the enterpriseproduction and management, this paper design the VVT engine manufacturing plantnetwork control system.The system uses control method of the network platformbased on the Ethernet technology and CAN bus technology,, the Ethernet is mainlyused for workshop production information collection, monitoring the implementationof each link in the production. The CAN bus control system is mainly used forworkshop equipment, realize the function of a device. Completion of the systemhardware and software design on the basis of the project analysis, hardware designmainly includes the design of production line and testing line control module, thedesign of data acquisition module and CAN network interface. The software designincludes the design of CAN driver design,scheduling algorithm.Through actual operation system platform,this paper make the analysis andoptimization of the reliability of the network control system, real-time performanceand scalability.First of all,use of the fault tree and Monte Carlo method to reliabilitysimulation of workshop system, analyzes and compares the two situation:use ofredundancy and unuse of redundancy technology. Put to use the CAN transceiverredundancy scheme to enhance system reliability.Secondly, on the basis of networkstructure plant system, specific comparison time windows scheduling algorithm andRM-EDF scheduling algorithm, and the RM, EDF and RM-EDF algorithm simulationwere compared by using Truetime toolbox.Using Stateflow toolbox, design the VVT manufacturing process flow chart.On the basis of the chart,making the real-timesimulation for RM, EDF and RM-EDF mixed scheduling algorithm, and the real-timecurve, analysis determined using the hybrid scheduling algorithm to improve thereal-time of the system.Finally, considering the manufacturing capacity of futureascending, on the situation of transverse expansion in limited, using the verticalexpansion to increase CAN gateway to improve the scalability of the system.Throughoptimization, reliability of the system and the real-time performance is improved,which in different bit error rate, reliability is improved by about2.5times, the loadratio under different circumstances, real-time performance is improved by about3times.