公开(公告)号：US06438431B1

公开(公告)日：2002-08-20

申请号：US09133161

申请日：1998-08-12

申请人： Qing-Guo Wang ,  Chang Chieh Hang ,  Qiang Bi

发明人： Qing-Guo Wang ,  Chang Chieh Hang ,  Qiang Bi

IPC分类号： G05B1302

CPC分类号： G05B13/042

摘要： Briefly, a preferred embodiment of the present invention includes an apparatus for tuning a regulator in a process controller. The digitized output from a standard relay and a parasitic relay are fed through digital to analog converter providing signals at 0.5&ohgr;c, &ohgr;c and 1.5&ohgr;c to the process, where &ohgr;c is the process critical frequency. The apparatus records the digitized relay output u′ and the digitized process output y′ until stationary oscillations are reached. The outputs u′ and y′ are then used to calculate the process frequency response at 0.50&ohgr;c, &ohgr;c and 1.5&ohgr;c. This data is then used to design the regulator, the output of which is converted to analog form and inputted to control the process.

摘要翻译： 简而言之，本发明的一个优选实施例包括用于调整过程控制器中的调节器的装置。 标准继电器和寄生继电器的数字化输出通过数字到模拟转换器提供，以0.5megac，ωgac和1.5omegac提供信号，其中omegac是过程临界频率。 该装置记录数字化继电器输出u'和数字化处理输出y'，直到达到稳定振荡。 然后输出u'和y'用于计算0.50omegac，ωgac和1.5omegac处理频率响应。 然后将该数据用于设计调节器，其输出转换为模拟形式并输入以控制过程。

公开(公告)号：US06697767B2

公开(公告)日：2004-02-24

申请号：US09978547

申请日：2001-10-18

申请人： Qing-Guo Wang ,  Tong-Heng Lee ,  Yong Zhang ,  Yu Zhang ,  Xue-Ping Yang

发明人： Qing-Guo Wang ,  Tong-Heng Lee ,  Yong Zhang ,  Yu Zhang ,  Xue-Ping Yang

IPC分类号： G06F1300

CPC分类号： G05B11/42 ,  G05B13/042

摘要： 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.

摘要翻译： 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。