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    • 5. 发明申请
    • HEATER AND MOTOR CONTROL
    • 加热器和电机控制
    • US20110118856A1
    • 2011-05-19
    • US13001899
    • 2009-06-22
    • Mark J. Brudevold
    • Mark J. Brudevold
    • G05B13/02
    • G05B11/36
    • The control method uses the following scheme: Control Value (CV)=Proportional Value (PV)+Derivative Value (DV)+Derivative Correction (DC), where PV goes from 0 to MAX and operates over a very narrow band—in a temperature control example plus or minus 1 degree C. from the setpoint and is used to stabilize CV and enforce the setpoint. DV goes from −MAX to MAX and is exponentially decayed over a time constant to weigh the most recent values heavier than older values. This allows the control to see the real derivative despite a large step size which might otherwise mask it and within a small time window. DC goes from −MAX to MAX and makes this scheme work for any situation. The desired derivative is defined based on the graph. This then adjusts to compensate when the slope is not following the ideal definition.
    • 控制方法使用以下方案:控制值(CV)=比例值(PV)+微分值(DV)+微分校正(DC),其中PV从0到MAX,并在非常窄的频带内工作 控制范例从设定值加或减1摄氏度,用于稳定CV并执行设定值。 DV从-MAX变为MAX,并在时间常数上呈指数衰减,以衡量比旧值重的最近值。 这允许控制看到真正的导数,尽管大的步长可能会掩盖它,并在一个小的时间窗口内。 DC从-MAX到MAX,使得该方案适用于任何情况。 所需的导数基于图形定义。 然后调整以补偿斜率不符合理想的定义。