Sliding mode control of a solenoid actuator for SCR system

Abstract

Electromechanical solenoid actuators are widely used in industrial applications that require fast and linear motion. High velocities can be achieved in small stroke lengths consequently the motion results with high-velocity impacts, which may cause excessive noise and create mechanical damage to the parts. In this thesis, the solenoid actuator of a prototype urea injector was controlled with sliding mode control (SMC) to archive soft landing to provide a longer life span to the product. To do that, various test setups were created to understand the urea injector system's behaviors and control them accordingly. Soft landing was achieved with the prototype urea injector while preserving the capability of spraying pressurized uid.

Elektromekanik sarmal eyleyiciler h zl ve do grusal harekete ihtiya c duyan end ustriyel uygulamalarda s k ca kullan lmaktad r. K sa mesafede cok y uksek h zlara c kabilen sarmal bobin pistonu; y uksek g u cl u darbeler ureterek, y uksek sese ve par calar uzerinde mekanik hasara sebep olabilir. Bu tezde, ilk ornek ure enjekt or un un eyleyicisi kayan kipli kontrolc u sayesinde yava s ini s yapt r larak enjekt or sisteminin mekanik omr un un uzat lmas sa glanm st r. Bunu yapmak i cinse bir cok test d uzene gi kurulmu s ve ure enject or u sisteminin davran slar g ozlenerek buna g ore kontrol edilmesi sa glanm st r. Enjekt or i gnesinin yava s ini si, enjekt or un sprey kapasitesi kaybedilmeden ba sar lm st r.