Research On Methods Of Observing The State Of Nonlinear Systems And System Design

Nonlinear systems are ubiquitous in various disciplines and fields.At present,there are a lot of researches on nonlinear systems,and the observation of these systems or signals is also a research hotspot.This paper mainly introduces the research on the methods of observation system,including the traditional observation methods and some new observation methods.Based on the study of these methods,a new observation method,namely effective extremum method,is proposed in this paper.Based on the equilibrium point theory,the definition of effective extremum method is given and the definition of effective extremum is proved theoretically.For Lorenz system,the effective extremum method is verified by simulation.In order to apply this method to practical application,this paper applies USB data acquisition card combined with Lab VIEW program design of the upper computer to establish an observation system that can automatically identify the state of nonlinear system.Observation system can reflect the phase diagram and the system trajectory at the same time it can achieve effective extremum method of automatic identification system signal state,The experiences to nonlinear signals after testing and debugging of observation system,the test results show the correctness and accuracy of this observation system.