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    • 36. 发明授权
    • Robust process identification and auto-tuning control
    • 强大的过程识别和自整定控制
    • US06697767B2
    • 2004-02-24
    • US09978547
    • 2001-10-18
    • Qing-Guo WangTong-Heng LeeYong ZhangYu ZhangXue-Ping Yang
    • Qing-Guo WangTong-Heng LeeYong ZhangYu ZhangXue-Ping Yang
    • G06F1300
    • G05B11/42G05B13/042
    • This invention provides a novel process identification and control package for high performance. For process identification, a simple yet effective and robust identification method is presented using process step responses to give a continuous transfer function with time-delay without iteration. A new relay, called cascade relay, is devised to get more accurate and reliable points on the process frequency response. For controller tuning, the internal model principle is employed to design single-loop controller PID or high-order types with best achievable control performance. The process identification and control design parts can be easily integrated into control system auto-tuning package. Further, a general control scheme for disturbance rejection is given which can significantly improve disturbance rejection performance over conventional feedback systems with time delays. Practical issues such as noises, real-time implementation and tuning guidelines are also provided. The invention covers both open-loop and closed-loop testing, and single and multivariable cases.
    • 本发明提供了一种用于高性能的新型工艺识别和控制封装。 对于过程识别,使用过程步骤响应呈现简单而有效和鲁棒的识别方法,以在没有迭代的情况下给出具有时间延迟的连续传递函数。 设计了一种称为级联继电器的新继电器,以获得更准确可靠的点处理频率响应。 对于控制器调谐,采用内部模型原理来设计具有最佳可实现控制性能的单回路控制器PID或高阶类型。 过程识别和控制设计部件可以轻松集成到控制系统自动调整包中。 此外,给出了用于干扰抑制的一般控制方案,其可以显着地改善具有时间延迟的常规反馈系统的干扰抑制性能。 还提供了实际问题,如噪音,实时执行和调整指南。 本发明涵盖开环和闭环测试以及单变量和多变量情况。
    • 37. 发明授权
    • Optical circulators
    • 光学循环器
    • US06445499B1
    • 2002-09-03
    • US09476610
    • 1999-12-31
    • Kok-Wai ChangKejian GuanYong Zhang
    • Kok-Wai ChangKejian GuanYong Zhang
    • G02B530
    • H04B10/61G02B27/283G02F1/093
    • An optical circulator having a dual fiber collimator and a single fiber collimator is described. The circulator provides a non-reciprocal functionality that directs input signals from a first fiber of the dual fiber collimator to the single fiber collimator. Input signals from the single fiber collimator are directed to a second fiber of the dual fiber collimator. The circulator includes birefringent wedges that change the angle of signals from the single fiber collimator to direct the signals to the second fiber of the dual fiber collimator. Because the circulator includes two collimators rather than three collimators, the circulator is more compact than a circulator having three collimators.
    • 描述了具有双光纤准直器和单光纤准直器的光循环器。 循环器提供了将来自双光纤准直仪的第一光纤的输入信号引导到单个光纤准直器的不可逆功能。 来自单个光纤准直器的输入信号被引导到双光纤准直器的第二光纤。 循环器包括改变来自单个光纤准直器的信号的角度以将信号引导到双光纤准直器的第二光纤的双折射楔形。 因为循环器包括两个准直器而不是三个准直器,所以循环器比具有三个准直器的循环器更紧凑。