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1. 发明申请

WO1997027588A1 MAGNETIC DISK APPARATUS 审中-公开
标题翻译：磁盘设备
公开(公告)号：WO1997027588A1
公开(公告)日：1997-07-31
申请号：PCT/JP1996000095
申请日：1996-01-22
申请人： HITACHI, LTD. , YAMAGUCHI, Takashi , TSUNETA, Katsuhiro , ONOYAMA, Katsumoto , ARAI, Tsuyoshi , FUJII, Yoshikatsu , NUMASATO, Hidehiko , HAMADA, Yosuke , KOBAYASHI, Masahito
发明人： HITACHI, LTD.
IPC分类号： G11B21/10
CPC分类号： G11B5/553
摘要： A sector servo magnetic disk apparatus comprising a sensor, such as an accelerometer (17), for detecting the state of a magnetic head or a magnetic head indication member at intervals equal to and shorter than the sampling period of a servo signal (14) converted to an output voltage proportional to a position by a demodulation circuit. The acceleration signal (19) and the servo signal (14) are inputted through A/D convertors (18 and 19), respectively, to a microprocessor (12) including a state estimation device (30) for estimating the state quantity of a control object. The output signal from the microprocessor (12) is supplied to the control object (25) through a feedback transfer function (28), a D/A convertor (15) and a buffer amplifier (16) while the servo signal (14) is inputted to a compensator (29), so that a main arithmetic loop is formed. According to this construction, the accelerometer (17) is fitted to the magnetic head or the member for indicating the magnetic head such as a carriage to detect the acceleration quantity. Accordingly, the occurrence of mechanical resonance of the carriage, for example, can be reduced, and detection accuracy of a speed signal can be improved. In this way, control performance of the servo control system can be improved.
摘要翻译：一种扇区伺服磁盘装置，包括诸如加速度计（17）的传感器，用于以等于和短于转换的伺服信号（14）的采样周期的间隔检测磁头或磁头指示部件的状态到由解调电路与位置成比例的输出电压。加速度信号（19）和伺服信号（14）分别通过A / D转换器（18和19）输入到微处理器（12），微处理器（12）包括用于估计控制的状态量的状态估计装置目的。来自微处理器（12）的输出信号通过反馈传递函数（28），D / A转换器（15）和缓冲放大器（16）被提供给控制对象（25），同时伺服信号（14）是输入到补偿器（29），从而形成主运算环路。根据这种结构，将加速度计17安装到磁头或用于指示诸如滑架的磁头的构件以检测加速度。因此，例如可以减少滑架的机械谐振的发生，并且可以提高速度信号的检测精度。以这种方式，可以提高伺服控制系统的控制性能。

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