基于FPGA的旋转变压器高精度高响应解码单元设计

发布时间：2018-03-03 04:17

本文选题：位置伺服系统　切入点：旋转变压器　出处：《中北大学》2017年硕士论文　论文类型：学位论文

【摘要】：在伺服控制系统中,位置伺服系统因其响应信号的物理变量为速度或加速度等一类变化快且较难跟踪的变化量,所以这类伺服系统结构比较复杂。当今伺服控制系统已被广泛应用于各个科研领域,其中对物体位置角度定位的精确性更是提出了较高要求。因此对高精度和高响应位置伺服系统的开发研究有较高的实际意义。电子设计自动化借助于可编程片上系统技术(SOPC)和电子设计自动化技术(EDA)日益成熟所提供的硬件支持,本文提出了以控制器与专用解码芯片为核心,配合外围工作电路的角位置解码方案。研究设计了一种基于FPGA为主控制器的旋转变压器角度位置测量系统,该系统可对360°范围内的角度位置信息进行解码。设计选用了高时钟频率的FPGA芯片和旋变专用解码芯片,保证了系统有较高的响应速度和准确的解码精度。在对整个解码系统的误差来源进行分析的基础上,提出了一种以软件干预为主,针对数字输出量的数据误差校正方法,将系统的解码精度控制在±0.01°的范围之内。系统的输出分为模拟信号和数字信号两种形式以实现不同的功能用途。论文从实际工程出发,搭建实验平台,选用光电编码器为参照依据,对两者角度解码数字量和模拟输出波形进行比对。实验结果表明,本文所设计的系统能够正常工作,在精确程度和响应速度方面基本达到设计要求。
[Abstract]:In the servo control system, the position servo system is difficult to track because the physical variable of the response signal is a class of changes such as speed or acceleration. So the structure of this kind of servo system is quite complicated. Nowadays, servo control system has been widely used in various fields of scientific research. Among them, the accuracy of position angle positioning of objects is also required. Therefore, the research and development of high precision and high response position servo system is of great practical significance. Electronic design automation is based on programmable chip. System technology (SOPC) and electronic design automation technology (EDAs) are becoming more and more mature to provide hardware support, In this paper, a scheme of angle position decoding based on controller and special decoding chip is proposed, which is combined with peripheral working circuit. An angle position measuring system of rotary transformer based on FPGA is studied and designed. The system can decode the angle position information in the range of 360 掳. The FPGA chip with high clock frequency and the special decoding chip for rotary transformer are used in the design. The system has high response speed and accurate decoding accuracy. Based on the analysis of the error source of the whole decoding system, a data error correction method, which is based on software intervention and is aimed at the digital output, is proposed. The decoding accuracy of the system is controlled in the range of 卤0.01 掳. The output of the system is divided into two forms, analog signal and digital signal, in order to realize different functional uses. The optoelectronic encoder is chosen as the reference to compare the digital signal decoded by the two angles and the analog output waveform. The experimental results show that the system designed in this paper can work normally. In the accuracy and response speed of the basic design requirements.
【学位授予单位】：中北大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM383.2

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