Modeling and simulation of virtual NOx

sensor based on sliding mode control

 

 

FENG Xueli

 

(Hangzhou Polytechnic, Hangzhou 311402, China)

 

 

Abstract: In order to solve the problems of reducing the content of Nox in theatmospheric NOx, the content of NOx was defecting, The sliding mode control theory was applied to the design of virtual NOx in sensor, After the analysis of the principle of sliding mode control, the relationship between the design of sliding mode control theory and virtual NOx sensor was established. A method was presented to build the virtual NOx sensor design by using Simulink′s Matlab modulemodel, And it was simulated.The simulation result and the ideal signal were comparison tested, The experimental results show that the virtual NOx sensor signal and the ideal signal display high coincidence, which indicated that the virtual NOx sensor is practical in theory.

 

Key words: sliding mode control; virtual NOx sensor; simulation