Mitsubishi Heavy Industries Limited

Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.

Ryo Sase

Takaharu Hiroe

Kazunari Ide

Ko Takayanagi

Yoshikatsu Ikawa

Yukio Yamashita

Atsushi Matsuo

Keisuke Okuda

Naoki Yahata

Shintarou Noguchi

Rikikazu Hayashi

Hiroshi Ito

Byeongil An

Masataka Shiraishi

Yosuke Kitamura

Yukihito Okuda

Nobuhiro Osaki

Yoshito Nagahama

Shoichiro Hosomi

Toshio Ishiwaki

Takayoshi Kuramoto

Tomohiro Doi

Hiroshi Kitayama

An engine control device includes: an injection command unit for outputting a fuel injection amount command value; a first calculation unit for outputting a fuel injection amount obtained by FB calculation based on an engine speed deviation to the injection command unit as a basic fuel injection amount; and a second calculation unit for outputting a fuel injection amount obtained by FF calculation based on an engine load at present of an engine to the injection command unit as a FF fuel injection amount. The fuel injection amount command value switches from a fuel injection amount calculated based on the basic fuel injection amount by the injection command unit to a fuel injection amount calculated based on a value obtained by adding the FF fuel injection amount to the basic fuel injection amount, if it is determined that a load application state has occurred in which the engine load before a prescribed time, which is not greater than a prescribed value, increases by not less than a variation threshold.

Engine control device, engine control system, and engine control program

A settlement device includes a measured value acquisition unit to acquire a measured value of active power transmitted or received at a connection point of a power transmission and distribution network and a regulating power providing means capable of providing regulating power to the power transmission and distribution network and a measured value of a frequency at the connection point; a regulating power measurement unit to measure regulating power at the connection point on the basis of the acquired measured value of the active power and the acquired measured value of the frequency; a regulating power amount calculation unit to calculate an amount of regulating power of a prescribed period at the connection point by integrating the regulating power over time; a power amount acquisition unit to acquire an amount of power transmitted or received in the prescribed period at the connection point; and a settlement unit.

Measurement device, measurement system, measurement method, and non-transitory computer readable medium for determining settlement for compensating a user for power received or provided

A control apparatus is configured to control driving of a power generation apparatus including a motor and a power generator. The control apparatus includes a processor configured to calculate: (i) a first adjustment force command value for controlling the motor in accordance with a deviation between an observed value and a reference value of a rotation speed of the power generator; (ii) a correction value for compensating for a delay of an electric output of the power generator; and (iii) a second adjustment force command value for controlling the motor by adding the first adjustment force command value and the correction value.

Control apparatus, control method, and non-transitory computer readable medium

A temporal change of a turbo rotation speed of a turbocharger is detected for each cycle of an engine. A first vibration component corresponding to each of cylinders is specified from a pulsation component included in the temporal change of the turbo rotation speed, and the first vibration components for each of the cylinders are integrated over a plurality of cycles. A variation of combustion states in the plurality of cylinders is calculated by comparing integration results among the cylinders.

Operating state determination device for engine, vehicle, operating state determination method for engine

A startup control device for adjusting a startup schedule during startup of a power generation plant, the device includes: a determining unit which determines, on the basis of a predicted value of a physical quantity corresponding to the elapsed time from startup when the power generation plant has started up on the basis of a prescribed optimal startup schedule, and an observed value of the physical quantity acquired during the startup of the power generation plant, whether the observed value will exceed the predicted value. The device also includes a speed adjusting unit which, if the determining unit determines that the observed value will exceed the predicted value, issues an instruction to decelerate the speed of progress of elapsed time from the startup in the optimal startup schedule; and a startup timer which progresses the elapsed time from the startup at a speed based on the instruction.

Startup control device, startup control method, and program

A control apparatusthat is configured to control driving of a power generation apparatus including a motor and a power generator, the control apparatus including a processorexecuting: a process of calculating a first adjustment force command value used for controlling the motor in accordance with a deviation between an observed value and a reference value of a rotation speed of the power generator; a process of calculating a correction value for compensating for a delay of an electric output of the power generator; and a process of calculating a correction value for compensating for a delay of an electric output of the power generator; and a process of calculating a second adjustment force command value used for controlling the motor by adding the first adjustment force command value and the correction value.

An abnormality detection device that detects an abnormality of a target device includes a processor that executes a process of acquiring a plurality of types of measured values of the target device, a process of calculating Mahalanobis distances of the acquired plurality of types of measured values, a process of extracting the plurality of Mahalanobis distances calculated in a past predetermined period from a point in time of evaluation of the target device and calculating a moving average value of a square value of each of the extracted Mahalanobis distances, and a process of determining whether or not an abnormality has occurred in the target device on the basis of the moving average value.

Abnormality detection device, abnormality detection method, and non-transitory computer-readable medium

The present invention provides a device and method for detecting a misfire in an engine, the device being provided with: a rotation speed sensor () as a supercharger rotation speed measurement unit for measuring a rotation speed (Nt) of a supercharger (); a misfire index calculation unit () that calculates a misfire index (Yt) from a degree of change in the rotation speed (Nt) of the supercharger (), the rotation speed being measured by the rotation speed sensor (); and a misfire determination unit () that determines a misfire in an engine () when the misfire index (Yt) calculated by the misfire index calculation unit () exceeds a pre-set determination value (D).

Device and method for detecting misfire in engine

An abnormality detecting apparatus that is configured to detect a presence or absence of an abnormality in a rotating machine includes a processor that is configured to execute a measured value acquisition process of acquiring, on the basis of a detection signal output from a vibration sensor that is configured to measure vibration caused by rotation of the rotating machine, a measured value including an amplitude and a phase of the vibration; a Mahalanobis distance calculation process of calculating a Mahalanobis distance of the measured value acquired at a time point at which the rotating machine is evaluated on the basis of a unit space configured with a plurality of measured values acquired at a plurality of past time points; and a determination process of determining that an abnormality has occurred in the rotating machine in a case where the calculated Mahalanobis distance exceeds a predetermined threshold value.

Abnormality detecting apparatus, rotating machine, abnormality detection method, and non- transitory computer readable medium

An anomaly detecting device includes: a singular value decomposition unit configured to perform singular value decomposition of a variance-covariance matrix of a measured value matrix ycomposed of measured values acquired by a plurality of sensors in a time period considered to be normal, to thereby calculate a singular vector U and a singular value matrix S; an anomaly determination unit configured to apply the singular vector U and the singular value matrix S to a measured value matrix yto be evaluated and which is acquired in an arbitrary time period to determine whether an anomaly is present from a result of application; and an anomalous part identification unit configured to, when the measured value matrix yis determined to be anomalous, identify an anomalous part based on a diagonal element of a matrix obtained in association with the measured value matrix y.

Anomaly detecting device, anomaly detection method and program

A control device () of a plant which controls operation amounts of a plurality of types of equipment constituting the plant, the control device includes a prediction model deriving unit () that derives a prediction model from which a monitoring target value is output, an adjustment amount calculating unit () that calculates adjustment amounts of operation amounts in the case where the monitoring target value becomes a desired value and calculates differences between the operation amounts of existing control and the calculated operation amounts as first adjustment amounts, a constraint condition setting unit () that sets constraint conditions based on a measurement value and operation conditions of the plant, and an operation amount calculating unit () that calculates second adjustment amounts to which the constraint conditions are applied and calculates a plurality of the adjusted operation amounts based on each of the calculated second adjustment amounts.

Control device, control method and computer readable medium for controlling plant based on prediction model and constraint condition

An abnormality detection device includes a processor and a storage unit connected to the processor. The processor is configured to execute an error vector acquisition process of acquiring an error vector representing a difference between a measurement value vector having multiple measurement values measured at a determination time as elements and an average value vector having an average value of the measurement values accumulated in the storage unit as an element, a component acquisition process of acquiring a plurality of components into which the error vector is decomposed with respect to a direction of a singular vector, a comparing process of comparing a value obtained by squaring each of the components into which the error vector is decomposed with respect to the direction of the singular vector with corresponding variance in the direction of the singular vector individually with respect to the direction of the singular vector, and a determination process of performing an abnormality determination on the basis of plural compared results in the comparing process.

Abnormality detection device, abnormality detection method, and program

A surge avoidance control method that includes a surge detection step of determining whether the operation point of the compressor is positioned in a surge operation region at each predetermined timing; a surge avoidance opening-degree calculation step calculating a surge avoidance opening degree of the operation device necessary for moving the operation point of the compressor determined to be positioned in the surge operation region in the surge detection step out of the surge operation region; a correction opening-degree calculation step calculating a correction opening degree of the operation device on the basis of a moving velocity of the operation point of the compressor which is determined to be positioned in the surge operation region in the surge detection step; and an opening-degree command value calculation step calculating an opening-degree command value of the operation device on the basis of the surge avoidance opening degree and the correction opening degree.

Surge avoidance control method and surge avoidance control device for exhaust turbine turbocharger

A method of detecting surging in a turbocharger provided for an internal combustion engine, includes: a first characteristic quantity calculation step of calculating a first characteristic quantity in at least one first frequency region corresponding to at least one first peak frequency component unique to the time of occurrence of surging in the turbocharger on the basis of a time-variable waveform indicating a time-series change of a rotation speed of the turbocharger; a second characteristic quantity calculation step of calculating a second characteristic quantity in a second frequency region including the at least one first frequency region on the basis of the time-variable waveform; and a detection step of detecting surging in the turbocharger on the basis of a relationship between the first characteristic quantity and the second characteristic quantity. The second frequency region further includes at least one second peak frequency unique to the time of acceleration and deceleration of the internal combustion engine from among frequency components different from the at least one first peak frequency component.

Surging detection method and surging detection device for turbocharger

A control device () for a supercharging system for supplying compressed intake air to an engine () includes: an engine controller (A) including an engine signal input part (A) and an engine control part (A) configured to control an operational state of the engine and to compute a target boost pressure of a supercharger (); and a turbo controller (B) including a turbo signal input part (B) and a turbo control part (B) configured to compute a margin of the supercharger. The control device is configured to compute a target boost-pressure corrected value by correcting the target boost pressure in accordance with a magnitude of the margin computed by the turbo control part, and to control a boost-pressure control unit () so that the boost pressure of the supercharger reaches the target boost-pressure corrected value.

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Tokyo, Japan

Ryo Sase