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91.发明公开METHOD FOR PREVENTING WINDUP IN PID CONTROLLERS EMPLOYING NONLINEAR GAIN 有权方法避WINDUP IN PID的控制器通过非线性增益
公开(公告)号：EP1004060A1
公开(公告)日：2000-05-31
申请号：EP98942075.7
申请日：1998-08-17
申请人： Honeywell Inc.
摘要： A method of preventing windup in a PID controller when using a nonlinear gain parameter is disclosed that is used in the PID controller of a process control system. The PID controller is arranged to produce within a current execution cycle a Control Variable (CV) to a device that is controlling a process responsive to an input Process Variable (PV), a setpoint (SP), and a gain parameter (K). The present invention receives the PV, the SP, and the K and generates a proportional, integral, and derivative component of the deviation of the PV from the SP. The components so generated are used to calculate an incremental output CV for the current execution cycle. A current value of gain is next calculated by subtracting the value of the gain for the current cycle from the value of the gain from the previous cycle. Testing for a linear or nonlinear gain parameter is done next and, responsive to a nonlinear gain parameter, a nonlinear gain change component is calculated and added to the incremental output CV. An output CV is generate for the current execution cycle by adding the incremental ouput CV modified by the nonlinear gain change component to the CV value of the previous execution cycle. The accumulated sum of proportional, integral, and derivative components of previous execution cycles are updated with the proportional, integral, and derivative components generated by the current execution cycle. These accumulated values will be used in calculating the nonlinear gain change component in the next cycle. However, if the testing identifies a linear gain parameter, the nonlinear gain change calculation is skipped and the output CV is generated by adding the incremental output CV to the CV value of the previous execution cycle.
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93.发明公开Method and apparatus for limiting a critical variable of a group of compressors or an individual compressor 审中-公开的方法和装置，用于限制的压缩机组中的临界尺寸或单个压缩机
公开(公告)号：EP0932091A2
公开(公告)日：1999-07-28
申请号：EP99400128.7
申请日：1999-01-20
发明人： Mirsky, Saul , Staroselky, Naum
IPC分类号： G05B23/02
摘要： This invention discloses a method for limiting a critical variable (such as, discharge pressure or suction pressure or pressure ratio) of either a compressor station or an individual compressor when these machines are subjected to large, fast disturbances. Each configuration, whether a station or an individual compressor, is equipped with two PID controllers: (1) a main controller for compressor critical variables and (2) a limiting controller that participates in modulatiag recycle valves. At the onset of sudden, large changes of mass flow at a compressor's or station's discharge, the effectiveness of the two controllers (acting independently) may be insufficient to prevent discharge pressure from reaching the shutdown set point which, in turn, disrupts the process supported by the compressors, and the longevity of the drivers is diminished. For these reasons, this disclosure relates specifically to a technique that combines the functions of the main and limiting controllers. Because of the complementary (synergistic) interaction of the controllers, an earlier and faster opening of the antisurge valves is initiated, and pressure at the discharge header is effectively limited.
摘要翻译： 本发明盘松的方法，用于限制的关键变量（：如，排出压力或吸入压力或压力比）无论是压缩站的或在各个压缩机当合成机进行大，几乎扰动。 每个结构中，无论是台或单个压缩机，装有两个PID控制器：（1）压缩机关键的变量，（2）一个限流控制器的主控制器没有参与modulatiag再循环阀。 在质量流量的突然的，大的改变在压缩机的或站的放电开始时，两个控制器（作用unabhängig）的有效性可能不足以防止到达关闭设定点，这反过来，破坏支持过程排出压力 通过压缩机和驱动器的寿命减少。 用于合成的原因，本发明特别涉及一种技术，确实结合了主要和限制控制器的功能。 因为对防喘振阀的更早更快开口被启动，并且压力在排放头中的控制器上的互补（协同）相互作用的是有效地限制。
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94.发明公开Compensation method for control systems, namely with high delay, and corresponding compensation control system 失效为补偿控制系统，特别是具有高的延迟和对应的补偿控制系统的方法
公开(公告)号：EP0898373A1
公开(公告)日：1999-02-24
申请号：EP97830425.1
申请日：1997-08-18
发明人： Dati, Angelo , Bietti, Ivan
摘要： The invention relates to a control signal compensation method particularly intended for an analog/digital processing system provided with a control loop, including in turn a controller (5) and a monitoring (4) circuit, characterised in that it comprises the following steps:
storing the corrections made by the controller;
fast processing such corrections in advance of the transmission of the corrections throughout the control loop;
generating a compensating signal (014) for the latency effects of the controller, by the use of a negative feedback loop provided at the monitoring circuit level.
The invention also concerns a compensation control system implementing the above method, and an analog/digital processing system incorporating such a compensation control system.摘要翻译： 本发明涉及特别用于提供与控制回路上的模拟/数字处理系统，进而包括一个控制器（5）和监视（4）电路，它DASS包括以下步骤的控制信号补偿方法，包括：存储 由控制器进行了更改; 几乎处理求修正预先校正在整个控制环的传输; 产生用于控制器的延迟效应的补偿信号（014），通过使用在监视电路级提供一个负反馈环路。 因此本发明涉及一种补偿控制系统实施上述方法，并进行模拟/数字处理系统结合寻求补偿控制系统。
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95.发明公开Regelsystem zur Regelung wenigstens einer Variablen eines Prozesses sowie Anwendung eines solchen Regelsystems 失效用于控制这样的控制系统的处理中的至少一个变量，以及应用控制系统
公开(公告)号：EP0890888A1
公开(公告)日：1999-01-13
申请号：EP97810463.6
申请日：1997-07-11
申请人： Asea Brown Boveri AG
IPC分类号： G05B5/01
CPC分类号： G05B5/01
摘要： Bei einem Regelsystem zur Regelung wenigstens einer Variablen (TIT m ) eines Prozesses, welche wenigstens eine Variable (TIT m ) aus einer Mehrzahl von gemessenen Prozessgrössen (TAT m , p Cm ) berechnet wird, wobei die gemessenen Prozessgrössen (TAT m , p Cm ) jeweils über zugehörige Messstrecken (18, 19) gemessen werden, deren Uebertragungsfunktionen (G 2 (s), G 1 (s)) ein unterschiedliches Zeitverhalten aufweisen, wird eine Verbesserung insbesondere bei transienten Vorgängen dadurch erreicht, dass zur Vermeidung von Instabilitäten Korrekturmittel (21) vorgesehen werden, welche die verschiedenen Zeitverhalten der einzelnen Messstrecken (18, 19) ausgleichen.
摘要翻译： 系统计算来自测量量中通过相关联的测量部分（18,19）所测量的过程（XM，TATM，PCM）较大部分的变量（YM，TITM）。 其传递函数（G1（S）G2（2））具有不同的时间响应。 纠正方法（21）防止不稳定性和拉平各测量部分的不同时间响应。 校正程序包括一个或多个纠正步骤（21），设置在测量部分后面以校正各测量段的时间响应。 每个纠正步骤（21）的传递函数（GMI（S），G3（S）），与该传递函数的工作（G1（S）G2（S））相关联的测量部和创建一个主传递函数 （戈瑞（S），G3（S）* G2（S））约等于进程中的所有数量来衡量。
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公开(公告)号：EP0597086B1
公开(公告)日：1999-01-07
申请号：EP93914244.4
申请日：1993-05-28
IPC分类号： G05B21/02
CPC分类号： G05B21/02 , F25B9/14 , F25B2309/001 , F25B2500/13 , G05B5/01
摘要： An adaptive control includes a digital error correction system (DECS) (51) to reduce control system error to near zero by anticipating a problem and feeding forward in time a correction to deal with the problem before it happens. The adaptive control is used in a controlled system of the kind which is cyclical in operation and which operates in response to repetitive cycle commands so that the operation of the system is substantially predictable for a significant number of cycles of operation. The adaptive control is incorporated in a refrigerator system in which two Stirling cycle refrigerators are mounted in opposition to one another. The adaptive control permits accurate control of the command waveform frequency and shape, enables the refrigerator system to be more thermodynamically efficient, and enables the two refrigerators to exactly cancel each other's vibration.
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97.发明公开Increased bandwidth for plants with resonant modes using nonlinear notch filters 失效增加了对使用非线性的陷波滤波器具有共振模式的设备的带宽
公开(公告)号：EP0817377A3
公开(公告)日：1998-08-26
申请号：EP97110425.2
申请日：1997-06-25
发明人： Fuller, James W. , Nett, Carl N.
IPC分类号： H03H11/04
CPC分类号： G05B5/01
摘要： A control system includes a plant 56 having resonant modes and a controller 5 which receives plant input signals on lines 14,24 from the plant 56 and provides a controller output signal I, related to a filter output signal V, which controls the plant 6. The controller is provided with a non-linear notch filter 30 which receives a filter input signal x related to the plant input signals and provides the filter output signal V. The notch filter has at least one notch frequency near one of the resonant modes so as to attenuate one of the modes by a predetermined amount and has a phase lag a decade below the lowest notch frequency of said notch filter which is less than that of a corresponding linear notch filter, thereby allowing the control system 7 to exhibit faster time response and increased bandwidth than a system employing linear notch filters.
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公开(公告)号：EP0631212B1
公开(公告)日：1998-07-15
申请号：EP93402082.7
申请日：1993-08-23
申请人： LG ELECTRONICS INC.
发明人： Wang, Bo-Hyeun , Kim, In Taek , Roh, Young Hoon
IPC分类号： G05B5/01
CPC分类号： G05B5/01
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100.发明公开
公开(公告)号：EP0657042A1
公开(公告)日：1995-06-14
申请号：EP93921269.0
申请日：1993-08-31
申请人： HONEYWELL INC.
发明人： JELINEK, Jan
CPC分类号： G05B5/01 , G05B11/32 , G05B13/048
摘要： This invention describes a way of controlling a plant with multiple inputs and multiple outputs but allowing an operator to direct the control as if each controlled variable had a direct connection to operator controlled variables. An interference network cross fertilizes information from multiple subcontrollers amongst themselves, to allow for enhanced control based on user defined criterion.
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