Showing papers on "Process variable published in 1979"
Patent•
23 May 1979TL;DR: In this article, the adaptive control of a process in which a feed forward control signal corresponding to a process demand is calculated according to a predetermined algebraic function, while a feedback correction signal is calculated on the basis of an error of the process feedback signal indicative of a controlled variable from a predetermined setting, and the controlled variable is controlled on the sum of these two signals.
Abstract: A system and method for the adaptive control of a process in which a feed forward control signal corresponding to a process demand is calculated according to a predetermined algebraic function, while a feedback correction signal is calculated on the basis of an error of a process feedback signal indicative of an error of a controlled variable from a predetermined setting, and the controlled variable of the process is controlled on the basis of the sum of these two signals. The adaptive control is such that, when a set point of the function deviates from the actual process demand, a value corresponding to the error appears in the feedback correction signal, and this value is used for automatically modifying the function itself to ensure the adaptive control of the process. A determination is made whether or not the process is in the steady state and when steady state operation is determined, the function of the feed forward control signal is modified.
43 citations
Patent•
09 Jan 1979
TL;DR: In this article, the authors provided a process control system with a deviation circuit for calculating a deviation of the process variable representing a state of a process to be controlled from the set-point value.
Abstract: There is provided a process control system having a deviation circuit for calculating a deviation of the process variable representing a state of a process to be controlled from the set-point value. And there is provided a process control system further including a differential circuit for differentiating a deviation, a controller for estimating a trend of a process on the basis of the two pieces of information and determining a proper controlling amount of the process variable in accordance with the process trend estimated.
20 citations
Patent•
16 Aug 1979
TL;DR: In this article, the authors proposed to reduce the load of the doctor for the pattern analyzing work, by measuring and recording the embryonic heart rate and the womb shrinking pressure of the pregnant woman and then comparing the specified variable constant calculated from these data with the fixed variable constant value for decision.
Abstract: PURPOSE: To reduce the load of the doctor for the pattern analyzing work, by measuring and recording the embryonic heart rate and the womb shrinking pressure of the pregnant woman and then comparing the specified variable constant calculated from these data with the fixed variable constant value for decision. CONSTITUTION: The heart rate signal and the womb shrinking pressure signal are supplied to the A/D converting part 4a from the heart rate detecting part 1 and the womb shrinking pressure dtecting part 2 each. Thus part 4a extracts these waveforms in the sampling cycle of, e.g., about 0.5 seconds. And these waveforms are then converted into the digital codes corresponding to the instantaneous waveheight value to be transferred to the data memory part 4b. The part 4b arranges and stores the digital codes corresponding to each waveheight value in the order of extraction and for the specified period of measurement, and then sends them to the temporary process parameter deciding part 4d 1 via the instantaneous process variable constant arithmetic process part 4c 1 and the periodical process variable constant arithmetic process part 4c 2 each to be compared with the fixed variable constant value. In this way, the load of the doctor can be reduced for the pattern analyzing work. COPYRIGHT: (C)1981,JPO&Japio
2 citations