Method and system for detecting a failure or performance degradation in a dynamic system such as a flight vehicle
First Claim
1. A method for detecting a failure or performance degradation in a dynamic system having sensors for measuring state variables of the system and providing corresponding output signals in response to at least one system input signal, the method comprising:
- calculating estimated gains of a filter and selecting an appropriate linear model for processing the output signals based on the at least one system input signal, the step of calculating utilizing at least one model of the dynamic system to obtain estimated signals;
calculating output error residuals based on the output signals and the estimated signals; and
detecting at least one hypothesized failure or performance degradation of a component or subsystem of the dynamic system based on the error residuals, wherein the step of calculating the estimated gains is performed optimally with respect to one or more of;
noise, uncertainty of parameters of the at least one model and un-modeled dynamics of the dynamic system.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and system for detecting a failure or performance degradation in a dynamic system having sensors for measuring state variables and providing corresponding output signals in response to one or more system input signals are provided. The method includes calculating estimated gains of a filter and selecting an appropriate linear model for processing the output signals based on the input signals. The step of calculating utilizes one or more models of the dynamic system to obtain estimated signals. The method further includes calculating output error residuals based on the output signals and the estimated signals. The method also includes detecting one or more hypothesized failures or performance degradations of a component or subsystem of the dynamic system based on the error residuals. The step of calculating the estimated values is performed optimally with respect to one or more of: noise, uncertainty of parameters of the models and unmodeled dynamics of the dynamic system which may be a flight vehicle or financial market or modeled financial system.
-
Citations
38 Claims
-
1. A method for detecting a failure or performance degradation in a dynamic system having sensors for measuring state variables of the system and providing corresponding output signals in response to at least one system input signal, the method comprising:
-
calculating estimated gains of a filter and selecting an appropriate linear model for processing the output signals based on the at least one system input signal, the step of calculating utilizing at least one model of the dynamic system to obtain estimated signals;
calculating output error residuals based on the output signals and the estimated signals; and
detecting at least one hypothesized failure or performance degradation of a component or subsystem of the dynamic system based on the error residuals, wherein the step of calculating the estimated gains is performed optimally with respect to one or more of;
noise, uncertainty of parameters of the at least one model and un-modeled dynamics of the dynamic system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
-
-
19. A detection system for detecting a failure or performance degradation in a dynamic system having sensors for measuring state variables of the dynamic system and providing corresponding output signals in response to at least one system input signal, the detection system comprising:
-
means for calculating estimated gains of a filter and selecting an appropriate linear model for processing the output signals based on the at least one system input signal, the means for calculating utilizing at least one model of the dynamic system to obtain estimated signals;
means for calculating output error residuals based on the output signals and the estimated signals; and
means for detecting at least one hypothesized failure or performance degradation of a component or subsystem of the dynamic system based on the error residuals, wherein the means for calculating the estimated gains calculates optimally with respect to one or more of;
noise, uncertainty of parameters of the at least one model and un-modeled dynamics of the dynamic system.
-
Specification