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基于DSP的数字阀控制器的研究
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摘要
本文主要工作是将步进电机正弦驱动和数字式位置反馈相互结合,目的在于提高系统的频响和分辨率,设计出应用于数字阀的控制器。
     在流体传动及控制技术领域将流体控制元件与电-机械转换元件组合构成电液控制元件将成为流体控制元件的重要的发展趋势。步进电机是一种利用电磁作用原理将电信号转换成机械动作的电机,它与流体控制元件相结合构成了电液数字控制系统。本文根据混合式步进电机的特点,将步进电机的正弦波驱动与位置反馈相互结合,提出了步进电机的矢量控制算法,设计了数字阀的驱动器。实验证明,该方法能有效的提高系统的频率响应和分辨率。本文主要内容如下所示:
     第一章结合国内外的文献,对本论文研究的主题进行综述。本章首先介绍了数字阀的种类,着重介绍了采用步进电机控制的增量式数字阀,接着阐述了步进电机的常用的控制方式。在此基础上,提出了课题的研究目的以及创新点。
     第二章本章介绍了步进电机的特点、工作原理及典型的控制方式。着重介绍了在典型控制方式下电机驱动的优缺点,提出了基于位置反馈的正弦波驱动控制方式。另外,计算了运动部件的转动惯量和液动力的影响,从而说明了系统是否带负载对频率响应的影响可以忽略。
     第三章主要介绍了基于DSP的数字阀控制器的硬件设计和实现。着重介绍了TMS320F2812的内部资源以及与位置传感器的接口的硬件实现,功率驱动板的具体设计以及软件实现方式等。
     第四章介绍了正弦波的原理和程序实现,着重阐述了传感器芯片AS5045进行了动态与静态的测试,并进行了位置闭环的实验。实验表明,该传感器具有较高的精度和良好的重复性,通过位置闭环实验表明矢量控制能提高系统的频率响应,同时能保证系统具有较高的分辨率。
     第五章全文总结并作后续展望。
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.
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