公开(公告)号：US4669040A

公开(公告)日：1987-05-26

申请号：US652181

申请日：1984-09-19

申请人： John W. Pettit ,  Douglas M. Carr

发明人： John W. Pettit ,  Douglas M. Carr

IPC分类号： G05B13/02 ,  G05B15/02 ,  G05B13/00

CPC分类号： G05B15/02 ,  G05B13/024

摘要： Method and apparatus for self-tuning a Proportional Integral-Derivative controller for controlling at least one load characteristic to a predetermined setpoint from calculated values of Proportional Band (PB), Integral Time Constant (ITC) and Derivative Time Constant (DTC) by application of power to the load, establishing a cut-off point to remove power to the load, determining the slope of a measured value of the at least one load characteristic and starting an integral time counter upon detection of the power cut-off point, determining at least one value X.sub.min at which the value of the measured value decreases by a fixed percentage, determining the maximum value X.sub.max of the at least one load characteristic, calculating the values of the PB, ITC and DTC by determining the rise X.sub.r =X.sub.max -X.sub.min and determining PB and ITC from a stored table relating X.sub.r to PB and the value incremented in the integral counter, determining the DTC value from the value incremented in the integral counter, storing the values of PB, ITC and DTC in a non-volatile storage and controlling the load with the aforementioned calculated values of PB, ITC and DTC.

摘要翻译： 用于自调谐比例积分微分控制器的方法和装置，用于通过应用比例带（PB），积分时间常数（ITC）和微分时间常数（DTC）从计算的比例带（PB），计算的值来控制至少一个负载特性到预定的设定点 确定负载特性的测量值的斜率，并在检测到断电点时启动积分时间计数器，确定在 至少一个值Xmin，其中测量值的值降低固定百分比，确定至少一个负载特性的最大值Xmax，通过确定上升Xr = Xmax-Xmin计算PB，ITC和DTC的值 并从存储的关于Xr到PB的表和在积分计数器中递增的值确定PB和ITC，从在积分计数器中增加的值确定DTC值 在非易失性存储器中使用PB，ITC和DTC的值，并用PB，ITC和DTC的上述计算值控制负载。