公开(公告)号：US20250005161A1

公开(公告)日：2025-01-02

申请号：US18709828

申请日：2022-10-26

Applicant: HITACHI, LTD.

Inventor： Takashi OGURA ,  Hiroshi IWASAWA ,  Daisuke TSUJI

IPC: G06F21/57

Abstract: An update detail verification system has: an update information input unit to which update information of a control system is inputted; an update information analysis unit that analyzes the update information; a verification information storage unit in which verification information concerning verification to be performed on detail of update is stored; an update and verification detail setting unit that sets detail of update to be executed on the control system and detail of verification to be executed on the update, among the result of analysis and the verification information; an update and verification execution time estimation unit that estimates an execution time required for executing the update and verification; and an execution feasibility determination unit that, by making a comparison between the estimated execution time and a predetermined limited time, determines whether or not the execution of update and verification can be completed within the limited time.

公开(公告)号：US20170082984A1

公开(公告)日：2017-03-23

申请号：US15311678

申请日：2015-05-07

Applicant: Hitachi Ltd.

Inventor： Tatsuya HORIGUCHI ,  Teppei HIROTSU ,  Hiroshi IWASAWA

IPC: G05B11/36

CPC classification number: G05B11/36 ,  G05B13/048

Abstract: The objective of the present invention is to increase reliability in an electronic control device when speculative execution is performed, by reducing the risk of erroneous control by the electronic control device, said erroneous control being due to speculative execution failures (such as failures to predict a future state or failure to complete a control calculation due to the execution of an advanced control calculation) which are generated when speculative execution is performed using limited hardware resources in an electronic control device having a control period restriction. Therefore, this electronic control device, which performs a calculation in accordance with one or more external inputs, and outputs a calculation result by a prescribed time, has one or more first calculation units that perform a calculation using a current input, and one or more second calculation units that perform a calculation using a prior input that been input at a point in time prior to the current input.

公开(公告)号：US20190187675A1

公开(公告)日：2019-06-20

申请号：US16301920

申请日：2017-04-13

Applicant: Hitachi, Ltd.

Inventor： Tatsuya HORIGUCHI ,  Teppei HIROTSU ,  Hiroshi IWASAWA

IPC: G05B23/02

CPC classification number: G05B23/0221 ,  G05B23/02

Abstract: Provided is a method of detecting and preventing soft errors without performing multiplexing. As a result, it is possible to improve reliability of a device while suppressing an increase in mounting cost and reduction in operation speed accompanied with it. A diagnosis system includes an initial parameter generation unit which generates a plurality of initial parameters predicted on the basis of an external input; an operation unit which has a plurality of operators operating optimal solutions to the initial parameters by using an evaluation function describing a control object; and a diagnosis unit which diagnoses the operation unit on the basis of an output of the operation unit. When an optimal solution candidate giving an evaluation value deviating from a value taken by each evaluation value by a constant threshold or more among evaluation values corresponding to the optimal solutions to the initial parameters is found, the diagnosis unit diagnoses an error of the operation unit.

公开(公告)号：US20240249624A1

公开(公告)日：2024-07-25

申请号：US18290311

申请日：2022-03-17

Applicant: HITACHI, LTD.

Inventor： Hiromichi ENDOH ,  Noritaka MATSUMOTO ,  Hiroshi IWASAWA

IPC: G08G1/16 ,  B60W60/00 ,  G08G1/0967 ,  H04W4/44

CPC classification number: G08G1/164 ,  B60W60/0015 ,  G08G1/096725 ,  G08G1/096775 ,  G08G1/166 ,  H04W4/44 ,  B60W2556/20 ,  B60W2556/45

Abstract: A safety management system for recognizing surrounding conditions and transmitting first surrounding condition data, and for respectively indicating safety actions to a first autonomous traveling machine that autonomously travels on a given first travel route on the basis of the first surrounding condition data and to a second autonomous traveling machine that autonomously travels on a given second travel route. An extraction unit sets, on the second travel route, a verification point where the second autonomous traveling machine can be recognized by the first autonomous traveling machine, and extracts an operation state of the second autonomous traveling machine at the verification point from the first surrounding condition data. A verification unit compares an operation state transmitted from the second autonomous traveling machine at the verification point and the operation state extracted by the extraction unit to verify the soundness of control in the second autonomous traveling machine.

公开(公告)号：US20220329564A1

公开(公告)日：2022-10-13

申请号：US17639860

申请日：2020-06-23

Applicant: Hitachi, Ltd.

Inventor： Tatsuya MARUYAMA ,  Noritaka MATSUMOTO ,  Hiroshi IWASAWA ,  Hiromichi ENDOH ,  Junya FUJITA

IPC: H04L9/40

Abstract: Conventional security measures are generally intended for an IT system, and it has been difficult to satisfy a real-time property and availability requested to a control system. Furthermore, since a time-division type time slot communication method is not taken into consideration, such time slot communication has problems in efficient utilization of computer resources and decrease in availability. In order to solve the above-described problems, the present invention specifies a time slot from characteristics of a communication packet received by a reception unit 133 by using a time slot characteristic storage unit 130, and selects, in accordance with the specified time slot, an inspection pattern stored in an inspection pattern storage unit 136 by using an inspection pattern selection unit 131.