Method and System for Detecting Integrity of a Control Loop of a Physical System
First Claim
1. An apparatus for controlling a physical system, comprising:
- a controller configured to output a command signal to control a state of a plant and to receive a feedback signal providing information about the state of the plant; and
an integrity detection system, wherein the integrity detection system is configured to;
output an excitation signal to the plant;
receive the feedback signal;
determine whether a component associated with the excitation signal is present in the feedback signal; and
identify whether or not the closed loop control system is experiencing a failure based the determination.
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Accused Products
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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Citations
19 Claims
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1. An apparatus for controlling a physical system, comprising:
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a controller configured to output a command signal to control a state of a plant and to receive a feedback signal providing information about the state of the plant; and an integrity detection system, wherein the integrity detection system is configured to; output an excitation signal to the plant; receive the feedback signal; determine whether a component associated with the excitation signal is present in the feedback signal; and identify whether or not the closed loop control system is experiencing a failure based the determination. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of detecting integrity of a closed loop control system of a physical system, the method comprising:
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outputting a command signal by a controller to control a state of a plant; receiving, by the controller, a feedback signal providing information about the state of the plant; outputting an excitation signal into the closed loop control system; receiving the feedback signal; determining whether a component associated with the excitation signal is present in the feedback signal; and identifying whether or not the closed loop control system is experiencing a failure based the determination. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. An apparatus for controlling a physical system, comprising:
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means for outputting a excitation signal into the closed loop control system; means for receiving a feedback signal; means for determining whether a component associated with the excitation signal is present in the feedback signal; and means for identifying whether or not the closed loop control system is experiencing a failure based the determination.
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Specification