Reconfiguration method for a sensor system comprising at least one set of observers for failure compensation and guaranteeing measured value quality
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Abstract
The invention relates to a reconfiguration method designed to be implemented in a computer system, for compensating failures of a sensor system (1). Said sensor system comprises at least one sensor (2, 50) for measuring (12, 22) system states of an application system (11, 21) and at least one system model (4) for describing the application system, which together form at least one first observer (6) for estimating system states in order to provide system states for an allocated data processing device (14, 24). According to the method, failure states for a first observer are determined from deviations, which occur as a result of the comparison between a number of states measured by the sensor or sensors and a state estimated by the system model.
10 Citations
33 Claims
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1-16. -16. (canceled)
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17. A reconfiguration method for implementation in a computer system for compensating failures of a sensor system (1) with at least two observers, each observer being formed by at least one sensor (2, 50) for measuring (12, 22) system states of an application system (11, 21) and by at least one system model (4) for estimating of system states of the application system, in order to make system states with a predetermined reliability available to an allocated data processing unit (14, 24), said method comprising the following steps:
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(a) ascertaining failure states based on time related deviation values for a first observer by comparing of a number of states measured by said at least one sensor, with a state estimated by said at least one system model, (b) initiating at least one further observer in response to the reaching of a first threshold level of said deviations, said further observer having a number of past time steps for determining a failure status of the further observer, and (c) transmitting the system states ascertained by the further observer to the data processing unit (14, 24) for further processing, as soon as the first observer has reached a second threshold value. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification