公开(公告)号：US5214913A

公开(公告)日：1993-06-01

申请号：US704139

申请日：1991-05-22

申请人： Yukiyoshi Tani ,  Sadao Yanada ,  Takeshi Iwamiya ,  Takumi Kawai ,  Tadahiko Iijima

发明人： Yukiyoshi Tani ,  Sadao Yanada ,  Takeshi Iwamiya ,  Takumi Kawai ,  Tadahiko Iijima

IPC分类号： G05B9/03

CPC分类号： G05B9/03 ,  Y10T137/86614

摘要： A method of and apparatus for controlling a triple-coil servo valve arranged having a tripled control system each of which is composed of components of a coil, a servo amplifier and a controller, the method of and the apparatus for controlling the triple servo valve including means for specifying the abnormality of each of the components, servo amplifier output separation means, means capable of desirably combining the components and means for compensating the servo amplifier. If two control systems of the tripled control system are faulty in such a manner that at least one coil, at least one servo amplifier or at least one controller is abnormal, the triple-coil servo is operated by combining the normal components or by compensating the servo amplifier so that the continuation of the operation of the plant is enabled. Although the operation of the plant employing the conventional structure is shut down if two systems of the tripled control system, each of which is composed of the coil, the servo amplifier and the controller, are abnormal, the continuation of the operation can be enabled according to the present invention while preventing a disturbance of the plant even if the two or the three systems are abnormal by combining normal components and by separating the output from the servo amplifier in a case where the servo amplifier is abnormal.

公开(公告)号：US4825352A

公开(公告)日：1989-04-25

申请号：US29094

申请日：1987-03-23

申请人： Tadahiko Iijima ,  Takumi Kawai ,  Yasuhiro Tennichi ,  Sadao Yanada

发明人： Tadahiko Iijima ,  Takumi Kawai ,  Yasuhiro Tennichi ,  Sadao Yanada

IPC分类号： G05B9/02 ,  F01K13/02 ,  G05B15/02 ,  G06F9/48 ,  G04F5/00 ,  G04G3/00

CPC分类号： G06F9/4825 ,  F01K13/02 ,  G05B15/02

摘要： A process control system has a timer circuit which fixes operational periods by issuing an instruction for starting each of a plurality of time periods in such a manner that the computation of control blocks will occur during periods of fixed duration. A periodic operation selection circuit selects control blocks to be computed within each time period in response to an instruction from the timer circuit. Control blocks selected by the periodic operation selection circuit and an instruction for completion of the computation of control blocks for each time period are stacked in an operation instruction circuit, which issues an instruction for consecutively executing the operation of the control blocks and an instruction for effecting an idle operation after completion of the operation of control blocks for each time period. When an instruction for starting an ensuing time period is issued from the timer circuit at a time when computation of a control block has not been completed within a predetermined time period, an operation completion determining circuit issues an instruction for starting the computation of the ensuing time period beginning with computation of the remaining control blocks in the predetermined time period and an instruction for stacking control blocks in the ensuing time period in the operation instruction circuit by means of the periodic operation selection circuit.

公开(公告)号：US4558227A

公开(公告)日：1985-12-10

申请号：US618676

申请日：1984-06-08

申请人： Sadao Yanada ,  Naganobu Honda ,  Hisanori Miyagaki ,  Seiitsu Nigawara

发明人： Sadao Yanada ,  Naganobu Honda ,  Hisanori Miyagaki ,  Seiitsu Nigawara

IPC分类号： G05B13/00 ,  F01K13/02 ,  F22B35/18 ,  G05B13/02 ,  F01D19/02

CPC分类号： F22B35/18 ,  F01K13/02

摘要： A method of controlling the operation of a thermoelectric power generating plant, in which the operation of the steam generating equipment and the turbine is controlled in accordance with the plant operation parameters obtained from given patterns of start up and operation of the plant. The method comprises: temporarily setting, in accordance with the above-mentioned patterns, the plant operation parameters concerning the rates of change of state of the plant such as the rates of turbine acceleration and turbine load and rates of increase of the main steam temperature and pressure; estimating the change of the quantity of state of main steam at a designated future moment; estimating the thermal stresses in respective stress-evaluation portions of the boiler and turbine; comparing the estimated thermal stresses with respective allowable thermal stresses determined so as to correspond to the consumption of the life allowed for each start up and operation cycle of the plant; selecting one of the estimated thermal stresses which has smaller margin to the allowable thermal stress and obtaining the operation parameter which provided the maximum rate of change of the state of the plant; repeating these steps until the command state is attained; and controlling the boiler and the turbine in accordance with the thus obtained plant operation parameter.

摘要翻译： 一种控制热电发电厂的运行的方法，其中根据从给定的工厂启动和运行模式获得的设备运行参数来控制蒸汽发生设备和涡轮机的运行。 该方法包括：根据上述模式临时设定关于工厂状态变化率的设备运行参数，例如涡轮加速度和涡轮机负载率以及主蒸汽温度的增加率，以及 压力; 估计未来时刻主蒸汽状态的变化情况; 估计锅炉和涡轮机的各应力评估部分中的热应力; 将估计的热应力与相应的允许热应力进行比较，所述热应力被确定为对应于每个启动和运行周期允许的寿命的消耗; 选择具有较小余量的估计热应力与允许的热应力之一，并获得提供植物状态的最大变化率的操作参数; 重复这些步骤直到达到命令状态; 并根据由此得到的设备运行参数控制锅炉和涡轮机。

公开(公告)号：US4445169A

公开(公告)日：1984-04-24

申请号：US273037

申请日：1981-06-12

申请人： Tadayoshi Wakita ,  Minoru Suzuki ,  Sadao Yanada ,  Sigeru Sibata

发明人： Tadayoshi Wakita ,  Minoru Suzuki ,  Sadao Yanada ,  Sigeru Sibata

IPC分类号： G05B19/05 ,  G06F3/023 ,  G06F3/048 ,  G06F15/46 ,  G06F9/00

CPC分类号： G06F3/0489 ,  G05B19/056 ,  G05B2219/14098

摘要： A sequence display apparatus including a sequence control circuit, a cathode ray tube control device and a sequence display control device is disclosed in which a keyboard included in the sequence display control device is provided with logical function specifying keys for specifying one of a plurality of logical functions corresponding to such logical circuits as AND, OR and flip-flop circuits and a timer and with keys for inputting the names of input signals and the name of an output signal. One logic function, all of the names of the input signals and the name of the output signal are inputted as one set by the key-in operation, each of a group of command codes which are determined by the kind of logical function and the number of the names of input signals, is added to a corresponding one of the names of the input signals and the name of the output signal which have been inputted, to compose a logical operation program. The names of input signals are collectively displayed at a left end part of the display surface of a cathode ray tube, a position on the display surface for displaying the logic symbol is determined in accordance with the number of input signals, and the arrangement of a line for connecting each of the names of the input signals and the logic symbol is determined on the basis of the state of the display at each of the picture elements forming the display surface.

摘要翻译： 公开了一种序列显示装置，其包括顺序控制电路，阴极射线管控制装置和序列显示控制装置，其中包括在序列显示控制装置中的键盘设置有逻辑功能指定键，用于指定多个逻辑 对应于诸如AND，OR和触发电路的逻辑电路的功能和定时器以及用于输入输入信号的名称和输出信号的名称的键。 一个逻辑功能，输入信号的所有名称和输出信号的名称通过键入操作被输入为一组，由逻辑功能的种类和数量确定的一组命令代码中的每一个 将输入信号的名称添加到输入信号的名称和输入的输出信号的名称中的相应一个，以构成逻辑运算程序。 输入信号的名称共同显示在阴极射线管的显示表面的左端部分，根据输入信号的数量确定用于显示逻辑符号的显示表面上的位置， 基于构成显示面的各像素的显示状态来决定连接输入信号和逻辑符号的各个名称的行。