Method and system for detecting integrity of a control loop of a physical system
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United States of America Patent
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Apr 18, 2017
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app pub date -
Mar 31, 2014
filing date -
Mar 31, 2014
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Abstract
In a control loop, a command signal is applied to physical components to cause movement of the physical components. The position of the physical components is detected and used to generate subsequent command signals. In an implementation, an integrity detection system causes an excitation signal to be injected onto the command signal to cause movement of the physical components at an excitation frequency. This movement is detected in the physical system control loop and isolated by the integrity detection system. If the integrity detection system fails to detect energy in the excitation frequency band, a failure of at least one component of the control system is inferred.
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