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题名	光盘伺服读出系统的设计与研究
作者	朱路
学位类别	硕士
答辩日期	2011
授予单位	中国科学院上海光学精密机械研究所
导师	阮昊
关键词	新一代多功能光盘 伺服控制 滑模变结构控制 HF信号读出
其他题名	The research for Optical Disc servo control and HF signal read-out System
中文摘要	高密度光存储设备作为一种存储媒质，具有密度高，体积小且携带方便等诸多优点，广泛地应用于影音娱乐、音像出版、计算机存储等领域。随着新一代多功能光盘NVD（Next-generation Versatile Disc）在物理格式上的不断革新，与传统的光存储设备相比，其存储容量得到了很大的提升。在满足市场对大容量数据存储需求的同时，也对相关领域内的关键技术提出了更加苛刻的要求。 高密度光存储技术的组成比较复杂，对各个部件的质量均有较高的要求。而其中的伺服控制部件和HF信号读出系统的质量尤为关键。光存储伺服、读出系统的性能优劣，在一定程度上决定了光存储数据的容量和读取能力。新型的光存储设备在物理格式上进行了有效革新，可以进一步压缩数据坑点的密度，扩展其存储范围。相应的，也要求光学头伺服控制具有更高的响应速度和更加稳定的伺服性能；其HF信号读出系统要求具备较优的容错能力，可以纠正由物理格式改变、外部干扰等引起的码间串扰等误差。 以上述两点作为基本出发点，本文主要分为四部分。首先文章说明了光存储伺服读出系统的基本框架。在详细阐述各部分结构，引入伺服调试平台的基础上，文章对伺服读出系统做具体介绍。其次，本文介绍一种新型的伺服控制器，该控制器以滑模变结构控制理论为基础，设计了内、外环控制器，并给出仿真结果，讨论该新型伺服控制器与传统伺服控制器的性能区别。再次，文章给出了光存储伺服平台调试的实验结果，分别讨论了该平台以及其他光存储测试平台之间针对DVD5、DVD9以及NVD12G盘片的读盘效果。最后，本文搭建HF信号读出系统，设计各功能模块：HF信号预处理、同步帧甄别、通道码恢复、数据格式转换以及数据比对。通过该系统可以读出HF信号并恢复出原始数据 ，同时也验证了伺服效果。
英文摘要	As a storage medium, High-density optical storage device is with large capacity, little size and convenience to transportaion. Therefore, this device is long-range applicated in many fields such as entertainment, publication and computer storage. The Next-generation Versatile Disc (NVD) makes effort to innovate in physical format. Compared to the classic optical storage device, its capacity is larger and could meet the market-demand for high capacity data storage. Meanwhile，it raised rigorous requirements in the related technical fields. The system of high density optical storage device is complex and the quality of each component must meet the strict definition. Servo control and HF signal read-out system are especially important among all of the optical storage components which could determine the capacity and the speed of reading the data recorded on the disc. NVD makes the effort to comprise the recording pit length, track pitch and expand the recording zone. This innovation requires higher responding speed and more stable stability of servo system. What is more, the HF signal read-out system should bear better performance of error correction to solve the problem of intervel signal interface (ISI). Base on the two basic topics mentioned above, this paper is consisted in four parts. Firstly, the main structure of Optical Disc servo control and read-out system are introduced and the component details such as servo debug platform and HF signal processing structure are elaborated. Secondly, a new servo controller based on Sliding-mode variable structure control theory which is consisted of inner loop and outer loop controller is designed. With the simulation results, this paper analyses thedifferences of servo performance between the new controller and the classic controller. Thirdly, the paper discusses the experiment results of three different optical discs which are DVD5, DVD9 and NVD12 applicated on different platforms between the Optical Disc servo platform and the optical storage tester. In the end of this thesis, the HF signal read-out system is introduced. By means of framing the functions of pre-equlization, channel bit recovery, data format convention and data comparison, the original user data could be recovered from the HF signal. At the same time, it could verify the servo performance.
语种	中文
内容类型	学位论文
源URL	[http://ir.siom.ac.cn/handle/181231/16691]
专题	上海光学精密机械研究所_学位论文
推荐引用方式 GB/T 7714	朱路. 光盘伺服读出系统的设计与研究[D]. 中国科学院上海光学精密机械研究所. 2011.

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