Patents by Inventor Peter Liggesmeyer

Peter Liggesmeyer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20130018692
    Abstract: A method for defining a safety-oriented requirements specification for a technical system completely and concurrently, has: carrying out a safety based specification identification process, performing a sequence based qualitative risk analysis to identify a plurality of safety critical states, partially eliminating safety critical states from identified critical states, recording a plurality of safety critical requirements by a system state machine, creating a reduced state machine based on technical system functional requirements and the recorded requirements, finding a plurality of failure modes and first countermeasures, finding data deviations and second countermeasures, finding failure modes and corresponding corrective actions with respect to a technical system interface, displaying information regarding the identified plurality of failure modes, performing a quantitative safety analysis regarding the technical system, identifying a plurality of risk values, and prioritizing functions in the safety-orie
    Type: Application
    Filed: July 13, 2011
    Publication date: January 17, 2013
    Applicant: Siemens Aktiengesellschaft
    Inventors: Zhensheng Guo, Peter Liggesmeyer
  • Patent number: 7823015
    Abstract: Disclosed is a full error description for a technical system which is described by a system description which can be processed by a computer and stored. The system description contains information on elements available in system and information on the links therebetween. An element error description is determined for each element taken into consideration, using a stored error description which is respectively associated with a reference element. At least one part of the reference elements is grouped into a reference element group and a group error description is determined for the reference elements of a reference element group using a stored group error description which is respectively associated with a reference element group, enabling possible errors of the reference elements of the reference element group to be described. A full error description is determined from the element error descriptions and the group error descriptions, taking into account information on element links.
    Type: Grant
    Filed: January 28, 2002
    Date of Patent: October 26, 2010
    Assignee: Siemens Aktiengesellschaft
    Inventors: Peter Liggesmeyer, Manfred Lohner, Oliver Mäckel, Martin Rothfelder
  • Patent number: 7047523
    Abstract: A section of a computer program is used to ascertain a control flow description and a data flow description, and program elements are selected from the section of the computer program. For each selected program element, a stored fault description associated with a respective reference element is used to ascertain an element fault description which describes possible faults in the respective program element. The element fault descriptions are used to ascertain the overall fault description, taking into account the control flow description and the data flow description.
    Type: Grant
    Filed: April 3, 2000
    Date of Patent: May 16, 2006
    Assignee: Siemens Aktiengesellschaft
    Inventor: Peter Liggesmeyer
  • Patent number: 7017080
    Abstract: The faults are described using a fault description which comprises data which have been determined using failure modes and effects analysis. The fault description is extended by information regarding the dependency of possible faults and the frequency of occurrence of said faults. The extended fault description is used to ascertain, for a prescribed fault event, the fault tree and the frequency of occurrence of the fault event.
    Type: Grant
    Filed: May 26, 2000
    Date of Patent: March 21, 2006
    Assignee: Siemens Aktiengesellschaft
    Inventors: Peter Liggesmeyer, Oliver Maeckel, Michael Rettelbach, Martin Rothfelder
  • Patent number: 6907386
    Abstract: Disclosed is a method wherein a state description of the technical system for an error occurrence and a state description of the technical system for error-free operation is determined in order to detect sensor and/or actor errors. The attainable states for both descriptions are preferably determined by model checking. A varying number of states of both descriptions is formed, said states being checked as to whether they comply with predeterminable conditions (e.g. safety requirements).
    Type: Grant
    Filed: March 3, 1998
    Date of Patent: June 14, 2005
    Assignee: Siemens Aktiengesellschaft
    Inventor: Peter Liggesmeyer
  • Patent number: 6839656
    Abstract: A method and an arrangement are provided for predicting measurement data using given measurement data, in which a stochastic process is matched to the given measurement data. Simulation runs are carried out from a given time-point until a final time-point. The forecast measurement data is determined for each simulation run. Measurement data for the final time-point is predicted within a range of values, which is determined by the forecast measurement data.
    Type: Grant
    Filed: December 10, 1999
    Date of Patent: January 4, 2005
    Assignee: Siemens Aktiengesellschaft
    Inventors: Thomas Ackermann, Michael Greiner, Peter Liggesmeyer, Oliver Maeckel
  • Publication number: 20040078736
    Abstract: Disclosed is a full error description for a technical system which is described by means of a system description which can be processed by a computer and stored. The system description contains information on elements available in said system and information on the links therebetween. An element error description is determined for each element taken into consideration, using a stored error description which is respectively associated with a reference element. At least one part of the reference elements is grouped into a reference element group and a group error description is determined for the reference elements of a reference element group using a stored group error description which is respectively associated with a reference element group, enabling possible errors of the reference elements of the reference element group to be described. A full error description is determined from the element error descriptions and the group error descriptions, taking into account information on element links.
    Type: Application
    Filed: August 19, 2003
    Publication date: April 22, 2004
    Inventors: Peter Liggesmeyer, Manfred Lohner, Oliver Mckel, Martin Rothfelder