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公开(公告)号：US5674194A
公开(公告)日：1997-10-07
申请号：US548126
申请日：1995-10-25
CPC分类号： G05B11/42 , G05D16/202
摘要： A process control system according to the present invention uses analog control circuitry in which a differential amplifier stage is incorporated into the feedback path rather that the feedforward path to enable the control of highly non-linear processes that may also exhibit high levels of hysteresis. Such processes often have superior performance characteristics that conventional control circuitry cannot exploit. The present invention additionally incorporates an automatic control circuit which varies the gain of various stages the control circuitry when the output of the process is within a predetermined range. An embodiment of the present invention is used to control a nonlinear proportional valve with severe hysteresis. The valve regulates the pressure within pressure-driven ophthalmic surgical instruments, which must be controlled extremely precisely to enable successful eye surgery.
摘要翻译： 根据本发明的过程控制系统使用模拟控制电路，其中将差分放大器级并入到反馈路径中，而不是前馈路径，以使得能够控制也可能呈现高水平滞后的高度非线性处理。 这样的过程通常具有优异的性能特征，其传统的控制电路不能利用。 本发明还包括一种自动控制电路，当过程的输出处于预定范围内时，该控制电路改变控制电路的各个级的增益。 本发明的实施例用于控制具有严重迟滞的非线性比例阀。 瓣膜调节压力驱动的眼科手术器械中的压力，这必须非常精确地控制，以使眼科手术成功。
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2.发明授权公开(公告)号：US07266488B1
公开(公告)日：2007-09-04
申请号：US10379977
申请日：2003-03-05
CPC分类号： G06F17/5022
摘要： A technique for performing signal integrity analysis of a system includes providing a stimulus pattern and a model of the system and performing analog simulation of the model utilizing the stimulus pattern. The stimulus pattern includes sequences of signal transitions with associated transition times and the sequences of signal transitions conform to a bus protocol and the associated transition times are according to characteristics of the system. The stimulus pattern is generated by initializing each of the sequences of signal transitions to an initial signal value and the associated transition times to an initial time, generating subsequent signal values and subsequent transition times by applying protocol rules and calculating timing adjustments for each of a list of transactions; the subsequent signal values and subsequent transition times to be added to the sequences of signal transitions.
摘要翻译： 用于执行系统的信号完整性分析的技术包括提供系统的刺激模式和模型，并且利用刺激模式来执行模型的模拟仿真。 激励模式包括具有相关联的转换时间的信号转换序列，并且信号转换序列符合总线协议，并且相关联的转换时间根据系统的特性。 通过将信号转换的每个序列初始化为初始信号值和相关联的转换时间到初始时间来产生刺激模式，通过应用协议规则并计算每个列表的时序调整来产生后续信号值和随后的转换时间 的交易; 随后的信号值和随后的转换时间被添加到信号转换序列。
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公开(公告)号：US06276900B1
公开(公告)日：2001-08-21
申请号：US09558904
申请日：2000-04-26
IPC分类号： F04B4106
CPC分类号： G06F1/20 , F04D29/661
摘要： A multiple fan system including at least two simultaneously operated fans. Each of the fans are operable as a constant speed fan and as an oscillating speed fan. Not more than one of the fans is operated as a constant speed fan. Each fan not being operated as a constant speed fan is operated as an oscillating speed fan. A fan controller operates each oscillating speed fan in a mode whereby a respective acoustic emission having a range of frequency different than any other oscillating speed fans is produced.
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公开(公告)号：US06349269B1
公开(公告)日：2002-02-19
申请号：US09209795
申请日：1998-12-11
IPC分类号： G01K112
CPC分类号： G05D23/1951 , G01K7/42
摘要： A thermal management of a computer system may be advantageously obtained by predicting temperature variations based upon past temperature readings. Such a system may, in preferred embodiments, filter the past temperature data to provide a more precise value, allow for a floating trip level that will change with the rate of temperature change and even allow for prediction of the amount of time left before a system shutdown may occur.
摘要翻译： 可以通过基于过去的温度读数来预测温度变化来有利地获得计算机系统的热管理。 在优选实施例中，这样的系统可以过滤过去的温度数据以提供更精确的值，允许将随着温度变化率而改变的浮动跳闸电平，并且甚至允许预测系统之前剩余的时间量 可能会发生关机。
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公开(公告)号：US06270319B1
公开(公告)日：2001-08-07
申请号：US09558903
申请日：2000-04-26
IPC分类号： F04B4106
CPC分类号： G06F1/20 , F04D29/661
摘要： A multiple fan system including at least two simultaneously operated fans. Each of the fans are operable as a constant speed fan and as an oscillating speed fan. Not more than one of the fans is operated as a constant speed fan. Each fan not being operated as a constant speed fan is operated as an oscillating speed fan. A fan controller operates each oscillating speed fan in a mode whereby a respective acoustic emission having a range of frequency different than any other oscillating speed fans is produced.
摘要翻译： 包括至少两个同时操作的风扇的多风扇系统。 每个风扇都可以作为恒速风扇和摆动风扇使用。 不超过一个风扇作为恒速风扇运行。 每个不作为恒速风扇运行的风扇都作为摆动风扇运行。 风扇控制器以这样的模式操作每个振荡速度风扇，由此产生具有与任何其它振荡风扇不同的频率范围的各个声发射。
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6.发明授权公开(公告)号：US06257832B1
公开(公告)日：2001-07-10
申请号：US09245145
申请日：1999-02-04
IPC分类号： F04B4106
CPC分类号： G06F1/20 , F04D29/661
摘要： A multiple fan system including at least two simultaneously operated fans. Each of the fans are operable as a constant speed fan and as an oscillating speed fan. Not more than one of the fans is operated as a constant speed fan. Each fan not being operated as a constant speed fan is operated as an oscillating speed fan. A fan controller operates each oscillating speed fan in a mode whereby a respective acoustic emission having a range of frequency different than any other oscillating speed fans is produced.
摘要翻译： 包括至少两个同时操作的风扇的多风扇系统。 每个风扇都可以作为恒速风扇和摆动风扇使用。 不超过一个风扇作为恒速风扇运行。 每个不作为恒速风扇运行的风扇都作为摆动风扇运行。 风扇控制器以这样的模式操作每个振荡速度风扇，由此产生具有与任何其它振荡风扇不同的频率范围的各个声发射。
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