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82 条记录 (耗时 0.024 秒)

    Closed-loop scaling for discrete-time servo controller in a disc drive
    51.
    发明授权
    Closed-loop scaling for discrete-time servo controller in a disc drive 有权
    磁盘驱动器中离散时间伺服控制器的闭环缩放

    公开(公告)号：US06414827B1

    公开(公告)日：2002-07-02

    申请号：US09475523

    申请日：1999-12-30

    申请人： Peter M. Young ,  John C. Morris ,  Mike E. Baum

    发明人： Peter M. Young ,  John C. Morris ,  Mike E. Baum

    IPC分类号： G11B5596

    CPC分类号： G11B5/59616 ,  G11B5/5552

    摘要： A method of configuring a discrete-time servo controller in a fixed-point digital signal processor (DSP) for controlling a servo actuator in a disc drive includes obtaining a stable, closed-loop representation of the servo controller and the servo actuator. Bounds on the controller states are derived from the stable closed-loop representation. The controller states are scaled based on the controller state bounds, and the servo controller is configured in the DSP based on the scaled controller states.

    摘要翻译： 在用于控制盘驱动器中的伺服致动器的定点数字信号处理器（DSP）中配置离散时间伺服控制器的方法包括获得伺服控制器和伺服致动器的稳定的闭环表示。 控制器状态的界限源自稳定的闭环表示。 控制器状态根据控制器状态范围进行缩放，伺服控制器根据缩放的控制器状态在DSP中进行配置。

    Polyesters of trans-4,4'-stilbenedicarboxylic acid, ethylene glycol, and 1,4-butanediol
    58.
    发明授权
    Polyesters of trans-4,4'-stilbenedicarboxylic acid, ethylene glycol, and 1,4-butanediol 失效
    反式-4,4'-二苯二甲酸，乙二醇和1,4-丁二醇的聚酯

    公开(公告)号：US4728720A

    公开(公告)日：1988-03-01

    申请号：US27

    申请日：1987-01-02

    申请人： John C. Morris ,  Winston J. Jackson, Jr.

    发明人： John C. Morris ,  Winston J. Jackson, Jr.

    IPC分类号： C08G63/54 ,  C08G63/52

    CPC分类号： C08G63/54

    摘要： The polyesters of trans-4,4'-stilbenedicarboxylic acid, 95 to 60 mol % 1,4-butanediol, and 5 to 40 mol % ethylene glycol can be injection-molded to give shaped objects having exceptionally high heat resistance. Many of the polyesters also have excellent hydrolytic stability and chemical resistance. The polyesters of this invention can be molded, extruded into film, or spun into fibers having these properties.

    摘要翻译： 反-4,4'-二苯二甲酸的聚酯，95〜60摩尔％的1,4-丁二醇和5〜40摩尔％的乙二醇可以注射成型，得到特别高的耐热性的成型体。 许多聚酯还具有优异的水解稳定性和耐化学性。 本发明的聚酯可以被模制，挤出成膜，或者纺成具有这些性质的纤维。

    Stabilized polyester compositions suitable for outdoor applications
    59.
    发明授权
    Stabilized polyester compositions suitable for outdoor applications 失效
    稳定的聚酯组合物适用于户外应用

    公开(公告)号：US4525504A

    公开(公告)日：1985-06-25

    申请号：US544034

    申请日：1983-10-24

    申请人： John C. Morris ,  Joseph S. Zannucci

    发明人： John C. Morris ,  Joseph S. Zannucci

    IPC分类号： C08G63/199 ,  C08K5/00 ,  C08K5/3435 ,  C08K5/3462 ,  C08L33/20 ,  C08K5/34 ,  C08K5/07 ,  C08K5/10

    CPC分类号： C08K5/3435 ,  C08G63/199 ,  C08K5/005 ,  C08K5/3462 ,  C08L33/20

    摘要： Disclosed are stabilized polyester compositions having significantly improved weatherability, said polyesters consisting of homopolyesters derived from a dicarboxylic acid component wherein at least a major portion of which is 1,4-cyclohexanedicarboxylic acid (or ester) having a trans isomer content of at least 65% and a glycol component wherein at least a major portion of which is 2,2,4,4-tetramethyl-1,3-cyclobutanediol and copolyesters thereof with modifying aliphatic glycols and/or aliphatic dicarboxylic acids, said polyesters being stabilized with the combination of at least one ultraviolet light stabilizing compound compatible with said polyester and at least one hindered amine light stabilizer having the formulae ##STR1## the groups shown as R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each independently selected from various substituents.

    摘要翻译： 公开了具有显着改善的耐候性的稳定的聚酯组合物，所述聚酯由衍生自二羧酸组分的均聚酯组成，其中至少大部分是具有至少65％的反式异构体含量的1,4-环己烷二羧酸（或酯） 和二醇组分，其中至少大部分为2,2,4,4-四甲基-1,3-环丁二醇及其与改性脂族二醇和/或脂族二羧酸的共聚酯，所述聚酯通过 与所述聚酯相容的至少一种紫外线稳定化合物和具有式I或II的至少一种受阻胺光稳定剂，所示的R1，R2，R3和R4所示的基团各自独立地选自各种取代基。

    Polyesters of trans-4,4'-stilbenedicarboxylic acid, terephthalic acid or 2,6-naphthalenedicarboxylic acid, 1,2-propanediol and 1,3-propanediol
    60.
    发明授权
    Polyesters of trans-4,4'-stilbenedicarboxylic acid, terephthalic acid or 2,6-naphthalenedicarboxylic acid, 1,2-propanediol and 1,3-propanediol 失效
    反-4,4'-二苯二甲酸，对苯二甲酸或2,6-萘二甲酸，1,2-丙二醇和1,3-丙二醇的聚酯

    公开(公告)号：US4468510A

    公开(公告)日：1984-08-28

    申请号：US551395

    申请日：1983-11-14

    申请人： John C. Morris ,  Winston J. Jackson, Jr.

    发明人： John C. Morris ,  Winston J. Jackson, Jr.

    IPC分类号： C08G63/54 ,  C08G63/18

    CPC分类号： C08G63/54

    摘要： This invention relates to polyesters of high molecular weight useful as films, fibers and molding plastics. It is particularly concerned with copolyesters comprising repeating units from trans-4,4'-stilbenedicarboxylic acid, optionally 0-40 mol % of terephthalic acid or 2,6-naphthalenedicarboxylic acid, and 1,2-propanediol, the polyesters having an inherent viscosity of about 0.3 or more and a flexural modulus of at least 900,000 psi.This invention is also concerned with copolyesters comprising repeating units of trans-4,4'-stilbenedicarboxylic acid, at least 10 mol % of one or more components selected from the group consisting of an aromatic dicarboxylic acid, aliphatic dicarboxylic acid or aliphatic glycol, and 1,3-propanediol. The polyesters have unobviously low gas permeability properties.

    摘要翻译： 本发明涉及可用作膜，纤维和模制塑料的高分子量聚酯。 特别涉及包含来自反式-4,4'-二苯乙烯二羧酸，任选0-40摩尔％对苯二甲酸或2,6-萘二甲酸的重复单元和1,2-丙二醇的共聚酯，该聚酯具有特性粘度 为约0.3或更大，弯曲模量为至少90万psi。 本发明还涉及包含反式-4,4'-二苯乙烯二羧酸的重复单元，至少10mol％的选自芳族二羧酸，脂族二羧酸或脂族二醇的一种或多种组分的共聚酯，以及 1,3-丙二醇。 聚酯具有非常显着的低透气性。