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1. 发明授权

US5483439A Digital servo control system 失效
标题翻译：数字伺服控制系统
公开(公告)号：US5483439A
公开(公告)日：1996-01-09
申请号：US132611
申请日：1993-10-06
申请人： Hiroyuki Ono , Koichi Ikarugi
发明人： Hiroyuki Ono , Koichi Ikarugi
IPC分类号： G05B13/02 , G05B11/42 , G05B13/04 , G05B17/02 , G05D3/12
CPC分类号： G05B11/42 , G05B13/04
摘要： In a digital closed loop servo control system, state variables of a plant are input to an inverse system having an opposite characteristic to an internal model, and the output of the inverse system is input to the internal model. If the state variables of the plant cannot be directly observed, a state estimator is used. In that case, the inverse system receives input and output of the plant and provides output thereof to the state estimator. Input of the internal model may be inputted to the state estimator instead of inputting the input of the plant to the inverse system. In this manner, it is possible to provide a digital servo control system in which the number of bits required in calculation (dynamic range) does not depend on the amplitude of the target value.
摘要翻译：在数字闭环伺服控制系统中，工厂的状态变量被输入到具有与内部模型相反的特性的逆系统，并且逆系统的输出被输入到内部模型。如果不能直接观察到工厂的状态变量，则使用状态估计器。在这种情况下，逆系统接收工厂的输入和输出，并将其输出提供给状态估计器。可以将内部模型的输入输入到状态估计器，而不是将工厂的输入输入到逆系统。以这种方式，可以提供一种数字伺服控制系统，其中计算所需的位数（动态范围）不依赖于目标值的幅度。

2. 发明授权

US5502565A Method and apparatus for measuring the flying height of a magnetic head above a disk surface at three wavelengths 失效
标题翻译：用于在三个波长处测量磁盘表面上方的磁头的飞行高度的方法和装置
公开(公告)号：US5502565A
公开(公告)日：1996-03-26
申请号：US293010
申请日：1994-08-19
申请人： Tadashi Fukuzawa , Teiji Hisano , Tetsuji Morita , Koichi Ikarugi
发明人： Tadashi Fukuzawa , Teiji Hisano , Tetsuji Morita , Koichi Ikarugi
IPC分类号： G11B5/455 , G01B11/14 , G11B5/60 , G11B21/21 , G11B33/10 , G01B9/02
CPC分类号： G11B5/6005 , G01B11/14 , G11B33/10
摘要： This invention provides a method and apparatus for accurately measuring the flying height of a magnetic head at high speed by using a white lamp and a color CCD camera. The invention entails substituting tentative refraction coefficients and extinction coefficients representative of colors in theoretical equations expressing the relationship between interference light intensity and flying height, thereby optimizing the parameters by non-linear regression. The flying height of a magnetic head is measured by using the coefficient thus determined. Also, this invention enables determination of flying height at very high speed through effecting the above optimization in consideration of constants associated with the shape of the head under consideration, and adapting the above theoretical equations.
摘要翻译：本发明提供了一种通过使用白色灯和彩色CCD照相机来高精度地测量磁头的飞行高度的方法和装置。本发明需要代替表示干涉光强度和飞行高度之间关系的理论方程中的颜色的暂定折射系数和消光系数，从而通过非线性回归优化参数。通过使用如此确定的系数来测量磁头的飞行高度。另外，本发明能够通过考虑与所考虑的头部的形状相关联的常数进行上述优化，并且适应上述理论方程，能够以非常高的速度确定飞行高度。

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