The Study Of Digital Valve's Controller Based On DSP

The thesis deals with the application of stepper motor as electrical-to-mechanical interface, combining subdivided drive and digital feedback. The study is aimed at improving overall performances the digital valve's controller, including the frequency response characteristics and resolution.Fluid transmission and control in the areas of fluid control technology and electronic components-a combination of mechanical components conversion electro-hydraulic control components fluid control devices will become an important trend of development. Stepper motor is a principle role will be using electromagnetic signals into mechanical movement of the motor, it is the combination of fluid control devices pose a number of electro-hydraulic control system.Chapter 1: Based on the hybrid stepping motor characteristics, the sine wave drive stepper motor and position feedback combined with each other to put forward stepper motor vector control algorithm for the design of the digital valve drive. Experiments show that the method can effectively improve the system frequency response and resolution. This paper mainly content as follows: Chapter 2: Integrate literature on the subject of this paper summarizes research. This chapter introduces the digital valve type, highlighted by a stepper motor control incremental digital valve, and then expounded the common stepper motor control. On this basis, the paper raises an issue of the purpose of the study and innovation.The chapter describes the characteristics of stepper motor, principle and the typical control mode. In addition, the calculation of the moving parts of the moment of inertia and momentum of the impact of the system so that the frequency response of the load with the impact can be ignored.Chapter 3: Introduces the DSP-based digital valve controller hardware design and implementation.TMS320F2812 focuses on the internal resources and position sensor interface hardware, power driver board, as well as the specific software design methods.Chapter 4: Introduces the principle of Sine Waves and procedures to achieve. The experiments show that the sensor with high accuracy, good repeatability, through the position of the experiments show that the closed-loop vector control system can increase the frequency response characteristics at the same time to ensure high-resolution system.Chapter 5: Summary and look for the follow-up prospects.