Hitachi, Ltd.

Computer and Automation Research Institute, Hungarian Academy of Sciences

Youichi Nonaka

Takahiro Nakano

Shiyuki Sakaue

József Váncza

Gábor Erdós

Makoto Ono

Kenji Tamaki

Tomotoshi Ishida

Hisaya Ishibashi

Yuuichi Suginishi

András Kovács

Daisuke Tsutsumi

Attila Lengyel

Bence Tipary

Laszlo Monostori

Yumiko Ueno

Dávid Gyulai

A product design and process design device includes: a storage unit that stores design specification information containing the tolerance of a dimensional variation at any site of an assembly product, part dimension error information, assembly facility error information, assembly tolerance information, the part dimension error information, and the assembly facility error information, part manufacturing cost information, and facility investment cost information with respect to the assembly facility error information; a tolerance distribution processing unit that uses the assembly tolerance information to generate proposed tolerance distributions that differ in distributional combination with respect to each error, and calculates part manufacturing costs and facility investment costs; a facility planning processing unit that determines a proposed tolerance distribution, with, as an evaluation index, total production costs respectively including the sums of the part manufacturing costs and the facility investment costs calculated; and an output unit that outputs the proposed tolerance distribution.

Product design and process design device

In order to automatically determine a structural member that is included in a structure and has flat surfaces, an input unit is configured to input three-dimensional point group data of the structure, a flat surface extraction unit is configured to extract the flat surfaces of the structure based on the three-dimensional point group data, a grouping unit is configured to group the flat surfaces into flat surface groups based on an angle of each of the flat surfaces with respect to a reference direction and a distance between the flat surfaces, a connection relationship extraction unit is configured to extract a connection relationship between the grouped flat surface groups, and a determination unit is configured to determine the structural member that the structure is constructed from based on the extracted connection relationship.

Three-dimensional model generating device, method of determining structural member, and program

Disclosed are a device, a system, and a method for setting standard work times that take real-world manufacturing capabilities into account. Provided is a standard work time calculation device (), which analyzes fluctuations in production line assessment indices on a per time period basis, and computes standard work times for each region, as classified according to the degree of fluctuation. The standard work time calculation device () comprises a fluctuation coefficient computation unit (), which computes coefficients of fluctuation for the assessment indices, a fluctuation region identification unit (), which identifies regions of fluctuation with coefficients of fluctuation that are greater than or equal to predetermined thresholds, and a standard work time computation unit (), which computes standard work times for regions of fluctuation.

Device for calculating standard work time, system for managing standard work time, method for calculating standard work time, and program thereof

In a quality control system for manufacturing industrial products, the product quality history and the manufacturing process history are collected and collated to calculate the correlation magnitude between the two histories. The candidates for the cause of quality variation hidden in the manufacturing processes are listed, and the correlation magnitude between all combinations of the variates of the manufacturing process history are calculated. Further, by utilizing the manufacturing sequence history used for an input plan, a causation connecting structure model between the manufacturing processes of the manufacturing line is automatically generated and automatically analyzed thereby to automatically extract the fundamental cause of quality variation from the candidates for the cause of quality variation. By doing so, the cause of quality variation of industrial products manufactured through a complicated process can be traced in a complicated connecting structure in the manufacturing history data.

Quality control system for manufacturing industrial products

A method and apparatus for controlling a robot which performs an operation on an object while applying any desired force to the object, and a method of controlling automobile suspensions so as to maintain the contact between the automobile and a road surface appropriately. A robot controller which controls the motion of an end effector includes a rotating body, using an external force applied to the effector. The controller beforehand measures the tensor of inertia of the rotating body, calculates the angular momentum of the rotating body on the basis of a sensed value output from a unit for sensing the rotational speed of the rotating body and the tensor of inertia of the rotating body, calculates a gyro-moment occurring in the rotating body on the basis of a sensed value output from a sensor for sensing the motion of the robot and the angular momentum of the rotating body, and uses as a control input value the external force from a sensor for sensing value minus the value of the gyro-moment. An automobile suspension is controlled by an external force applied to a wheel of the automobile, using as a control input value a sensed value output from a sensor for sensing the external force minus the value of a gyro-moment occurring in the wheel.

Gyro-moment compensation control method and apparatus

A control system in which an end effector of a robot is mechanically compliant for a particular object. The robot has multiple degrees of freedom and movement and includes a sensor which senses a velocity nd a sensor which senses an external force. A virtual compliance control method is applied to the robot. Influence of the weight and gyro moment of the end effector is subtracted from a value obtained from a mechanism which senses the external force to set a term of the external force in a mathematic model of the control system constructed during control. By such arrangement, when a rotational body having a mechanically large rotational momentum is set as the end effector of the robot, the control system is mechanically compliant with the object.

Method of controlling robot's compliance

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Tokyo, Japan

Youichi Nonaka