公开(公告)号：US10592668B2

公开(公告)日：2020-03-17

申请号：US15531139

申请日：2015-11-23

Applicant: HOWARD UNIVERSITY

Inventor： Charles J. Kim

IPC: G06F21/55 ,  G06F21/56 ,  G05B9/02 ,  G06F11/16 ,  G06F11/14

Abstract: A redundant and diverse secondary control system mirrors a primary control system but has some fundamental structural difference as compared to the primary control system to prevent a spread of a security breach from the primary control system to the secondary control system. The secondary control system may operate on different hardware built on different software written with different programming language as compared to the primary control system while performing the same function as that of the primary system. By hardware coding the algorithm to produce actuation signals, software based viruses and worms cannot interfere with the secondary control system's operation. A monitor device receives actuation signals from both the primary and secondary controls signals to determine whether an error occurred and to provide correct actuation signals to the controlled system.

公开(公告)号：US20180307841A1

公开(公告)日：2018-10-25

申请号：US15531139

申请日：2015-11-23

Applicant: Howard University

Inventor： Charles J. Kim

IPC: G06F21/56 ,  G06F21/55

CPC classification number: G06F21/567 ,  G05B9/02 ,  G06F11/1487 ,  G06F11/1641 ,  G06F11/165 ,  G06F21/552

Abstract: A redundant and diverse secondary control system mirrors a primary control system but has some fundamental structural difference as compared to the primary control system to prevent a spread of a security breach from the primary control system to the secondary control system. The secondary control system may operate on different hardware built on different software written with different programming language as compared to the primary control system while performing the same function as that of the primary system. By hardware coding the algorithm to produce actuation signals, software based viruses and worms cannot interfere with the secondary control system's operation. A monitor device receives actuation signals from both the primary and secondary controls signals to determine whether an error occurred and to provide correct actuation signals to the controlled system.

公开(公告)号：US09423443B2

公开(公告)日：2016-08-23

申请号：US14261642

申请日：2014-04-25

Applicant: Howard University

Inventor： Charles J. Kim

IPC: H04L12/26 ,  G06F15/00 ,  H04B10/08 ,  G01R31/02 ,  H04L25/02 ,  H04L27/02 ,  H04L27/10 ,  H04L27/18 ,  H04L12/24 ,  H04B10/077 ,  H04L1/24 ,  H04L1/00

CPC classification number: G01R31/02 ,  H04B10/0771 ,  H04L1/243 ,  H04L25/0266 ,  H04L25/0268 ,  H04L27/02 ,  H04L27/10 ,  H04L27/18 ,  H04L41/0677 ,  H04L2001/0094 ,  Y04S40/166

Abstract: Data associated with at least one building condition or status is sensed by one or more sensors. The data from these sensors may be sent over a data bus and received by the central computer. In addition, a modulated signal may be transmitted by one or both of the transmitters across the data bus. The modulated signal is received at the receiver, which analyzes the received modulated signal, and determines whether an intermittent fault has occurred on the data bus based upon the analyzing. For example, the receiver may compare the received signal to an expected pattern and when a discrepancy exists, an intermittent fault is determined to exist. The receiver may also determine the location of the fault based upon the analysis.

Abstract translation: 与至少一个建筑物状况或状态相关联的数据由一个或多个传感器感测。 来自这些传感器的数据可以通过数据总线发送并由中央计算机接收。 此外，调制信号可以由数据总线中的一个或两个发射器发送。 在接收机处接收调制信号，该接收机分析接收到的调制信号，并基于分析确定数据总线上是否发生了间歇故障。 例如，接收机可以将接收到的信号与预期模式进行比较，并且当存在差异时，确定存在间歇性故障。 接收机还可以基于分析来确定故障的位置。