The electro-hydraulic position servo system has the advantages of high control accuracy, fast response speed, large output power, flexible signal processing, and easy realization of various parameter feedback. Therefore, it has spread to various technical fields of the national economy and military industry. In recent years, new requirements have been put forward for the control performance of the electro-hydraulic position servo system, such as rapidity, stability, and accuracy. As the core controller of the electro-hydraulic position servo system, it plays a more critical role. At present, embedded microprocessors have been widely used in the field of industrial control with their small size, special purpose, portability, and high reliability, such as industrial processes, remote monitoring, intelligent instruments and meters, robot control, CNC systems, etc. Embedded microprocessors embedded in real-time operating systems can overcome the shortcomings of the traditional single-chip control system\'s insufficient functions and the non-real-time nature of the PC-based control system. Its performance and reliability can meet the control requirements of the electro-hydraulic position servo system, and have broad application prospects in the control field. This paper takes the electro-hydraulic position servo system in the laboratory as the research object. According to the control requirements of the system, a scheme is proposed to control the electro-hydraulic position servo system with a controller based on the ARM9 (S3C2410) microprocessor, and a new electro-hydraulic position servo controller based on the ARM9 (S3C2410) microprocessor is designed. In the development and design of the system controller, on the basis of the controller with the ARM9 (S3C2410) microprocessor as the core, the system controller has rich hardware resources through external expansion, and the A/D conversion circuit, D/A (PWM) conversion circuit, servo amplifier circuit, serial interface and other circuits are developed. At the same time, in order to make the program code of the controller have strong readability, maintainability and scalability, the operating system is used. The uC/OS-Ⅱ real-time kernel is selected through comparison and successfully transplanted to the ARM9 (S3C2410) microprocessor, and the A/D, digital filtering, D/A (PWM) and other software programs are written. After compilation, debugging and verification, the program runs normally. In the selection of control strategy for the electro-hydraulic position servo system, three control strategies, namely PID, sliding mode variable structure and fuzzy self-learning sliding mode, were used for simulation comparison. It was found that the fuzzy self-learning sliding mode control strategy is more conducive to system control.
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