The Mechanism Design And The Research Of Control Strategy For Concentric Dual Soft Shaft

The paper has designed the testing control system for the circuit breaker long delayperformance. The testing platform involves computer, internet, multi-media and othertechnologies. It improves the method that is the use of manual test experience. Theequipment adapt to the needs of the market growth and development of the intelligentequipment industry research depth.First, the paper introduces the overload delay check theory of the circuit breaker andthe thermal bimetallic strip heating mechanism. Through analyzing the basic equation ofheat conduction, the heat, electrical and mechanical coupling model of the thermalbimetallic strip cantilever beam and the dynamical model of the concentric dual soft shaftare established. Second, through researching the thermal bimetallic strip deformationtrajectory, the concentric dual soft shaft is designed based on the image visual positioningsystem. The thermal bimetallic strip deformation trajectory can be followed in real timewith the system. Third, the small distributed control system is designed. It includesintelligent data operating layer, process control system, and field control system. Theintelligent data operating layer is responsible for dealing with the image positioninginformation and communicates with process control system with the OPC (OLE forProcess Control). The process control system is responsible for dealing with the Power onself Module, axial movement module and screw nut control module with the PLC(Programmable Logic Controller). The field control system is the action mechanismactuator.In the system, the loop control system with the Torque and speed double quantitativedouble is built to alternative torque sensor. The stepper motor and magnetic grid are usedto accurate positioning.The adiusting positioning error is less than0.2mm. At last, the paper simulated the testing. The testing time of one breaker could be reduced by30%, andthe result was satisfied.