公开(公告)号：US20220292418A1

公开(公告)日：2022-09-15

申请号：US17678778

申请日：2022-02-23

Applicant: Hitachi, Ltd.

Inventor： Kei UTSUGI ,  Issei SUEMITSU ,  Sanato OHTOSHI ,  Yutaka NAGAI

IPC: G06Q10/06 ,  G06N3/04

Abstract: An operation risk evaluation system includes: a model storage unit configured to store a surrogate model that is a learned model of a relationship between an input that is a first feature amount of the operation and an output that is a second feature amount of the operation calculated by a predetermined simulation of one of the steps, the learned model being configured to surrogate for the predetermined simulation in which an output corresponding to an input having the same value has indeterminity different for each input; a prediction unit configured to predict a plurality of the second feature amounts having indeterminity corresponding to the first feature amount having the same value in the step; and a risk evaluation unit configured to evaluate a risk of the operation in the step based on the plurality of second feature amounts having indeterminity predicted by the prediction unit.

公开(公告)号：US20220382934A1

公开(公告)日：2022-12-01

申请号：US17741060

申请日：2022-05-10

Applicant: Hitachi, Ltd.

Inventor： Yutaka NAGAI ,  Sanato OHTOSHI ,  Kei UTSUGI

IPC: G06F30/20

Abstract: An object of the invention is to efficiently and automatically generate a simulation model used for verification from 3D CAD information. In order to solve the above problem, the invention provides a simulation model generation device configured to identify a connection relation between part elements constituting the device. The simulation model generation device includes: a contact surface number determination unit configured to determine the number of contact surfaces between the part elements using structural model data in the device; a shared rotation axis determination unit configured to determine, using the structural model data, presence or absence of a shared rotation axis between the part elements; and a connection relation identification unit configured to identify a connection relation between the part elements indicating any one of non-contact, fixation, slide, and rotation according to the number of the contact surfaces and the presence or absence of a shared rotation axis.