磁存储读写通道伺服Burst信号采样模型的优化与仿真分析  

Optimization and Emulational Analysis on Sampling Model of Serve Burst Signal in Read/Write Channel of Magnetic Storage

作　　者：吴非[1] 袁宏志[2] 王庆东[1] 谢长生[1] 

机构地区：[1]华中科技大学计算机学院教育部外存储国家专业实验室,武汉430074 [2]湖北工业大学,武汉430064

出　　处：《计算机科学》2008年第11期54-55,103,共3页Computer Science

基　　金：国家自然科学基金(60303031);国家“973”重点基础研究发展计划(2004CB318203)资助

摘　　要：在伺服系统中,为了计算出伺服位置误差信号(PES),需对伺服burst信号进行高精度采样并通过FFT计算。但目前大多数公司为了降低成本,使用带硬盘控制器芯片88i6310作为伺服读写通道控制芯片,其读写通道伺服系统都采用6位ADC转换器,并且伺服系统和数据信号共用采样电路。由于采样时会产生量化噪声干扰,因此对伺服burst信号来说6位分辨率的ADC转换器显然是不够的,经过FFT计算后burst信号会产生较大的误差。首先依据采样量化误差模型分析了现有的伺服系统过采样模型,并提出了改进型的伺服系统过采样模型。通过仿真得知,改进型采样方案将平均量化误差由原来的0.38LSB降到了0.14LSB,ADC转换器的分辨率由原来的7.5bit提高到8.8bit。In order to calculate the serve position error signal （PES） in the serve system, it is necessary to make high definition sampling and FFT calculation for the burst signal. Based on the reference, for reducing cost purpose, most designers adopt 6-digit ADC convector in the read-write channel serve system of hard drive controller chip 88i6310, and both serve system and signal system share the sampling circuit. Because of the quantitative noise disturbing during the sampling process, it is not enough to use 6-digit ADC converter for the serve burst signal, and significant deviations exist for the burst signal with the FFT calculation. This article quantitative error model first, and provided the enhanced serve enhanced solution reduces the average quantitative error from ADC convector from 7.5 bits to 8. 8 hits. analysed the existing serve sampling statistic model by system sampling model. The simulation shows that, the 0. 38LSB to 0. 14LSB, and improves the resolution of

关 键 词：读写通道 伺服信号 重采样 数据存储 

分 类 号：TP274.2[自动化与计算机技术—检测技术与自动化装置] TM921.541[自动化与计算机技术—控制科学与工程]