Modeling And Control For New Type Of Direct-drive Motor Pump Cylinder Servo System Based On T-S Model

Because of the fast response speed, large control power law, big load stiffness, stronganti-jamming capability advantages of the hydraulic servo technology, so it has beenwidely used in many fields such as civil and national defense. Currently the populardirect-drive type hydraulic servo system is by changing the speed of the motor to changequantitative pump output flow, so that achieve the purpose of adjusting the speed ofexecutive element. It improved the effect of energy saving significantly, and which hasbeen heavily promoted by the experts and scientific research institutes at home and abroad.At present, many well-known companies and research institutions at home and abroadhave carried out in view of the motor and hydraulic pump integration productdevelopment and application, and obtained some achievements. In this paper, the authorstudies on hydraulic pump is based on the Yanshan university professor Gao Dianrong ofthe axial piston pump was studied, such as products, the plunger type electro-hydraulicpump adopts the quantitative pump variable speed motor is in this way, in the realizationof the expected performance at the same time. It has the advantage of simple structure,light quality, and low energy loss, which has high research value and application prospect,is the future development direction of hydraulic power source.First of all, in this paper, the pump controlled cylinder servo system workingprinciple and system composition are analyzed. Traditional mechanism analysis modelingmethod is adopted to establish the model of the system, combining with the actualparameters of the system, and based on the model of the system stability analysis, theresults show that the system has good stability.Secondly for pump controlled cylinder servo system for highly nonlinear systems,time-varying, strong coupling, and uncertain parameters. Based-on adaptive fuzzyclustering is discussed of T-S model to approximate the system identification method. Thispaper introduces the overall process of T-S fuzzy modeling, modeling method in view ofthe past to set the number of clustering problem, on the basis of the improved fuzzyclustering segmentation algorithm, adaptive selection method is gave to the identification algorithm of clustering number c, and the parameter adaptive fuzzy clustering algorithmwas proposed. Combining with the recursive least squares method to construct T-S fuzzyidentification algorithm, the simulation shows that the identification method has higherrecognition accuracy.Then, this paper studies the T-S fuzzy system as the controlled object, based onLyapunov stability criterion principle, adopt the parallel distributed compensationcontroller design method and the linear matrix inequality (LMI) technique, the T-S fuzzysystem for stability analysis and controller design, the simulation results verified thesuperiority and effectiveness of the method.Finally, this paper putforward a kind of fuzzy generalized predictive control for pumpcontrolled cylinder servo system based on T-S model, and the feasibility of this methodhas been proved by MATLAB simulation software.