Research On Electro-hydraulic Position Servo Control System Based On Arm Microprocessor

Electro-hydraulic position servo system has a lot of trait,such as high control accuracy,quick response speed,big output power,flexible signal process and easy realization feedback of various quantity etc,Therefore it has already spread over each technique realm of national economy and military industry.In recent years,some new requests in the Electro-hydraulic position servo system control aspect are brought forward,such as speediness,stability,accuracy.In order to realize those points,the controller is regarded as the core of Electro-hydraulic position servo system,control function is more key.Currently,Embedded Microprocessors with miniaturization,special use,convenient hold and high dependable characteristics have already gotten extensive application in the industry controlled realm,such as industrial process,long distance supervision,intelligence instrument,robot control and numerical control system etc.Real time operate system is embedded in the Embedded Microprocessors,it can overcome function shortage based on MCU control system and the weakness of non-real time based on PC control system. Its capability,dependability can satisfy control request of Electro-hydraulic position servo system,It will have extensive applied foreground in the control realm.Electro-hydraulic position servo system in the laboratory is regarded as research object,according to control request of system,a control scheme is brought forward in the thesis.that is to say,Electro-hydraulic position servo system is controlled by the core of Embedded system and a new Electro-hydraulic position servo system controller core is designed based on ARM9 microprocessors.In the development design of system controller,on the basis of ARM9(S3C2410)microprocessor,system controller has abundant hardware resources through exterior expandability,such as ADC circuit,DAC (PWM)circuit,servo enlarged circuit,serial interface circuit,at the same time,operate system is chosen in order to make procedure code stronger readability,maintenance and expandability,uC/OS-Ⅱis chosen through comparison and is transplanted ARM9(S3C2410)microprocessor successfully, then A/D collection In fixed time,the numeral filter wave,D/A(PWM)program etc are written,those procedure Pass edit,debugging,verification and run normally.In the choice process of control means,PID,sliding mode and fuzzy self-learning sliding mode are compared through the analysis result of three kinds of control means,fuzzy self-learning sliding mode is displayed to advantage in control system.