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1. 发明专利

JPH10312201A PROCESS CONTROLLER FOR CLOSED LOOP SYSTEM INCLUDING PID ADJUSTER 失效
公开(公告)号：JPH10312201A
公开(公告)日：1998-11-24
申请号：JP13787597
申请日：1997-05-12
申请人： MITSUBISHI HEAVY IND LTD
发明人： FUJIWARA TOSHIKATSU , IWAI MASATAKA
IPC分类号： G05B11/36 , G05B13/02
摘要： PROBLEM TO BE SOLVED: To provide a process controller for a closed loop including a PID adjuster by which the proportional gain of the PID adjuster is automatically calculated so as to obtain always proper value without being affected adversely by the secular change of a process characteristic. SOLUTION: The closed loop system including the PID adjuster consisting of the three operation of proportion, integration and differentiation for outputting a process and operation variable with respect to the process according to a target value is provided with a means setting the proportional gain of the PID adjuster with the target value and the output of a control gain adjuster arithmetic-processed based on a control variable outputted from the process at the time of varying the target value. To put it in the concrete, the proportional gain of the PID adjuster is made variable, at the time of varying the target value r(t)6, an error between them is inputted to an integrator so as to make the absolute value of the fine coefficient of the control variable y(t)4 close to a desirable value α* and the output of the integrator is made the proportional gain of the PID adjuster. Then, a desirable value α* is provided with a value only until some period passes after the fluctuation of a target value r(t)6 but becomes zero after then.

2. 发明专利

JPH0916203A DISTRIBUTION CONTROLLER 失效
公开(公告)号：JPH0916203A
公开(公告)日：1997-01-17
申请号：JP16622295
申请日：1995-06-30
申请人： MITSUBISHI HEAVY IND LTD
发明人： FUJIWARA TOSHIKATSU , MIYAGAWA HIROKAZU , HIRAYAMA YUTAKA
IPC分类号： G05B11/36
摘要： PURPOSE: To provide a distribution controller which makes the variation width of the state quantity of each process uniform and improves the control performance. CONSTITUTION: This distribution controller is equipped with a function generator which outputs commands of the state quantities of respective processes 2, 3, and 4 based on the value of disturbance which is already known, a subtracter which finds the deviations of the respective current state quantities of the processes 2, 3, and 4 from their commands, a multiplier which squares the respective deviations, an integrator which integrates the respective outputs, a 1st gain multiplier which finds the respective outputs of the integrators corresponding to the total of all the outputs as gains of the respective processes 2, 3, and 4 and multiplies them with the corresponding deviations, a 1st adder which adds all the outputs of the 1st gain multiplier, a 2nd gain multiplier which multiplies the output of the 1st adder by a gain regarding all the processes, and a 2nd adder 15 which adds the output of the 2nd gain multiplier to the output of a PID controller 14.

3. 发明专利

JPH0882559A DEVICE FOR MEASURING FRICTIONAL FORCE OF WATER FEEDING CONTROL VALVE 失效
公开(公告)号：JPH0882559A
公开(公告)日：1996-03-26
申请号：JP21924994
申请日：1994-09-13
申请人： MITSUBISHI HEAVY IND LTD
发明人： SUGANUMA SHINICHIRO , TERANISHI SUSUMU , FUJIWARA TOSHIKATSU
IPC分类号： G01L5/00 , G21D1/00
摘要： PURPOSE: To measure the valve friction force of a water feeding control valve in the water feeding control system without disturbing the plant operation even when the plant is running. CONSTITUTION: A control signal D1 for water feeding control valve is sent to a valve lift control part 16 to control the opening of a water feeding control valve 15. An M-series signal from an M-series signal generator 32 is added as outer disturbance to the signal D1. The signal D1 and a water feeding control valve lift signal D2 showing the opening of the valve 15 are collected by a data collecting and measuring part 34 in time sequence. In the part 34, a physical approximate model that shows the relation between the signals D1 and D2 and is provided with the items corresponding to the valve friction force generating in the valve 15 is prepared. The signal D1 and a plurality of functions of valve friction force that are estimated to be generated are given to the model one by one so as to obtain a plurality of valve lift behaviours. Those that are most approximate to the collected signal D2 are selected in order to determine the corresponding valve friction force function.

4. 发明专利

JPH07231565A OPTIMAL LOAD DISTRIBUTION SYSTEM 失效
公开(公告)号：JPH07231565A
公开(公告)日：1995-08-29
申请号：JP1954694
申请日：1994-02-16
申请人： MITSUBISHI HEAVY IND LTD
发明人： SASAHARA MASAYA , FUJIWARA TOSHIKATSU , HIRAYAMA YUTAKA
IPC分类号： H02J3/00 , G05B13/02 , G05B23/02
摘要： PURPOSE:To provide an optimal load distribution system in which an appropriate initial value can be set automatically and a value better than the previous optimal load distribution value can be obtained. CONSTITUTION:An optimal load distribution operating unit 2 operates an optimal load distribution of each element for demanded load based on an object model characteristic data 3 and an initial value 4. When the operation results of the operating unit 2, i.e., an optimal load distribution value, does not satisfy a load modification request, an initial set value operating unit 7 modifies the characteristic parameters for an evaluation function value obtained through the optimization calculation thus searching an appropriate initial value.

5. 发明专利

JPH0484002A STEAM TEMPERATURE CONTROLLER 失效
公开(公告)号：JPH0484002A
公开(公告)日：1992-03-17
申请号：JP19631390
申请日：1990-07-26
申请人： MITSUBISHI HEAVY IND LTD
发明人： MASUDA MAKIO , FUJIWARA TOSHIKATSU , NAITO SHUZO , MIYAGAWA HIROKAZU
IPC分类号： F22B35/00
摘要： PURPOSE:To raise the response performance against a load variation by comparing outlet temperature target value signals for water wall third stage, fourth stage, and flue evaporator and the sensed temperature signals to obtain deviation signals and obtaining operation signals by carrying out proportional and differential control calculations and adding the signal given by addition and composition of the operation signals and the fuel feedforward signals to obtain fuel signals. CONSTITUTION:By pressure sensors 1A-1C, temperature sensors 2A-2C the outlet pressures and outlet temperatures of third stage and fourth stage of water wall and flue evaporator are detected. The outlet pressure signals 3A-3C of pressure sensors 1A-1C are inputted to function generators 5A-5C to obtain temperature target signals 4A-4C. To comparators 8A-8C function temperature target value signals 4A-4C and temperature detection value signals 6A-6C from temperature sensors 2A-2C are inputted to obtain deviation signals 7A-7C. The deviation signals 7A-7C are inputted to control and adjustment devices 10A-10C to carry out proportional and differential control calculations to obtain operational value signals 9A-9C. In an adder 20 the signal by addition and composition of respective operation value signals 9A-9C and fuel feedforward signal 18 are added and composed to obtain fuel signal 19 and steam temperature is controlled.

6. 发明专利

JPH0475101A FEEDFORWARD CONTROLLER 失效
公开(公告)号：JPH0475101A
公开(公告)日：1992-03-10
申请号：JP18785590
申请日：1990-07-18
申请人： MITSUBISHI HEAVY IND LTD
发明人： FUJIWARA TOSHIKATSU , HIROE TAKAHARU
IPC分类号： G05B11/32 , G05B13/02
摘要： PURPOSE:To keep control performance with high accuracy even when known disturbance is fluctuated or when the characteristic of a process is changed in the lapse of time by finding a feedforward signal to prevent a controlled variable fluctuated by using the a mathematical model. CONSTITUTION:The dynamic characteristic of the process 1 is expressed in the mathematical model, and the parameter of the mathematical model is identified by a method of least square by fetching the controlled variable (y), the manipulated variable (u), and the known disturbance (d) of the process 1, and the feedforward signal can be found based on the parameter and the known disturbance (d). The feedforward signal is added on the output signal of a controller 2, and a result is inputted to the process 1 as the manipulated variable. Therefore, the feedforward signal to prevent the controlled variable (y) of the process fluctuated even when the known disturbance (d) is fluctuated can be found, and it is added on the output signal of the controller 2, and is supplied to the process 1 as the manipulated variable (u). Thereby, it is possible to stably perform the control of the process 1 even when the known disturbance is fluctuated.

7. 发明专利

JPH0245087B2 失效
公开(公告)号：JPH0245087B2
公开(公告)日：1990-10-08
申请号：JP11936081
申请日：1981-07-31
申请人： MITSUBISHI HEAVY IND LTD
发明人： FUJIWARA TOSHIKATSU , MYAGAWA HIROKAZU
IPC分类号： F22G5/12

8. 发明专利

JPH0236869B2 失效
公开(公告)号：JPH0236869B2
公开(公告)日：1990-08-21
申请号：JP4390482
申请日：1982-03-19
申请人： MITSUBISHI HEAVY IND LTD
发明人： YOSHIDA YUKIIE , HARUE TETSUO , MURATA RYOICHI , FUJIWARA TOSHIKATSU
IPC分类号： F25B15/00

9. 发明专利

JPH0221309A BACK-UP DEVICE FOR PLANT OPERATION 失效
公开(公告)号：JPH0221309A
公开(公告)日：1990-01-24
申请号：JP17232588
申请日：1988-07-11
申请人： MITSUBISHI HEAVY IND LTD
发明人： MURATA RYOICHI , FUJIWARA TOSHIKATSU
IPC分类号： G08B31/00 , G05B23/02
摘要： PURPOSE:To obtain the information equivalent to the decision of an expert operator secured when the abnormality occurs by storing the diagnosing knowledge of the equipment of a plant to be diagnosed together with the equipment component data into the 1st and 2nd memories and referring to the knowledge stored in both memories to diagnose the abnormality. CONSTITUTION:The diagnosing knowledge of equipments are stored in a 1st memory 1; while the equipment component data are stored in a 2nd memory. Then the abnormality is diagnosed by reference to the knowledge and data stored in both memories 1 and 2. Thus it is possible to obtain the information equivalent to the decision of an expert decision secured when the abnormality occurs. As a result, even an unskilled operator is equivalent to an expert operator in terms of plant operations. Then the working rate and the safety can be improved in a plant.

10. 发明专利

JPS63217402A SET VALUE CALCULATING DEVICE 失效
公开(公告)号：JPS63217402A
公开(公告)日：1988-09-09
申请号：JP5092387
申请日：1987-03-05
申请人： MITSUBISHI HEAVY IND LTD
发明人： TAKEUCHI YUICHI , IWAI MASATAKA , HANEDA TOSHIO , ARAOKA MAMORU , FUJIWARA TOSHIKATSU , TAKADA SHUHO
IPC分类号： G05B11/32 , F22B35/00
摘要： PURPOSE:To set the delay time of the optimum variable set value despite the different response of a process in both rising and falling cases, by varying the delay time of the variable set value between the rising the falling cases of a command signal. CONSTITUTION:When a command signal 1 falls and then rises, the set value 3 varies. Then the delay time is set so that the set value 7 having a delay in a falling case and the set value 6 having a delay in a rising case are varied. In this case, a selector 8 selects the higher one of both values 6 and 7 as the final set value 9 to be given to a control system. As a result, the values 7 and 6 are selected when the signal 1 falls and rises respectively. Thus it is possible to set the delay time of the optimum variable set value despite the different response of a process.

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