Kabushiki Kaisha Toshiba

Nippon Steel Corporation

Tokyo Shibaura Denki Kabushiki Kaisha

Ishikawajima-harima Jukogyo Kabushiki Kaisha

Toshihiro Koyama

Yoshiro Seki

Takao Kawanami

Toshiyuki Shiraishi

Yoshiharu Anbe

Takahiro Watanabe

Hiroyuki Ohashi

Hiroyuki Shiozaki

Kunio Sekiguchi

Miyako Miyoshi

Ken Okudaira

Yuji Fujiwara

Kizo Nagashima

Yoshikazu Oba

Takuo Funahashi

Kazuchika Nagao

Hideo Takahashi

A control apparatus for a ventilator that ventilates a tunnel in response to visibility of the inside of the tunnel, including at least one picture image input device configured to take a picture of the inside of the tunnel, a visibility index determination device configured to determine a visibility index value on the basis of a picture image data of the picture taken by the picture image input device in light of a table representing a relationship between the picture image data and the visibility index value, a feedback controller configured to calculate an operation command for operating the ventilator on the basis of a feedback control value calculated by comparing the visibility index value with a target value of the visibility index value.

Control apparatus for ventilating a tunnel

A vehicle traffic control apparatus includes a vehicle location detection unit for detecting the locations of vehicles within a track, a track monopolized state control unit for storing and controlling the monopolized state of the track which is monopolized by the vehicles, an allocation request unit for requesting allocation of a dynamic monopolized section as a range, in which each vehicle can freely run in both inbound and outbound directions, on the basis of the locations of the vehicles which are detected by the vehicle location detection unit, and an allocation unit for collating the allocation of the dynamic monopolized section to each vehicle with the track monopolized state control unit, executing actual allocation of dynamic monopolized sections on the basis of a collation result, and causing the track monopolized state control unit to store the allocation result. The allocated dynamic monopolized section is transferred from a ground/vehicle transfer unit to each vehicle, and a vehicle speed control unit performs speed control on each vehicle.

Vehicle traffic control apparatus

An improved plate flatness control method adapted to effect a control so that plate flatness of a rolled material is made optimum by adjusting manipulated variables. In determining correction quantities of the manipulated variables, under the constraint that upper and lower limits exist in at least one of the manipulated variables and the correction quantities, a weighted square sum of deviations of a plate flatness distribution in the width direction of the rolled material is taken as an objective function to determine, using a non-linear programming, correction quantities of the manipulated variables where the objective function becomes minimum, thus, to control the plate flatness of the rolled material on the basis of the determined correction quantities of the manipulated variables.

Method of controlling plate flatness and device therefor

There is disclosed a looper control system for a continuous rolling mill comprising: a section for performing the integral operation of respective deviations between measured values and target values with respect to the tension and the looper angle, and the proportional operation of respective deviations between the tension, the looper operation angle, and the rotational speed of the looper motor at the time of start of the control and those at the present time to synthesize values thus obtained to deliver them to the looper current control unit or the looper control unit, a section for performing the integral operation and the proportional operation similar to the above to synthesize the values thus obtained to deliver them to the main motor speed control unit; and an optimum gain setting unit for correcting respective proportional gains in dependency upon the speed of the main motor. The system may additionally have a section for altering the optimum gain by the fact that the tension is extreme and/or the looper angle is extreme.

Looper control system for continuous rolling mill

In a method and system for controlling a final thickness of a strip material being rolled in a single-stand/multi-pass rolling mill having an adjustable main parameter affecting the final thickness and one or more auxiliary parameters affecting an intermediate thickness, the reference value of the main parameter is corrected in accordance with the deviation of the final thickness from its reference value and a reference value of at least one of the auxiliary parameters is corrected to cancel the effect of the correction to the main parameter on the intermediate thickness.

Thickness control method and system for a single-stand/multi-pass

In a method and a system for controlling an interstand tension in a continuous rolling mill having a looper provided between a pair of successive rolling stands and driven by a looper drive motor, a correction to the speed target value for the looper drive motor is determined in accordance with the deviation of a detected looper operating angle from an angle target value, and the looper drive motor is controlled in accordance with the speed of corrected speed target value.

Method and system for controlling an interstand tension in a continuous

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Saitama-ken, Japan

Toshihiro Koyama