System and method for self-calibration of an actuator
AssigneeEmerson Process Management Valve Automation, Inc.
InventorsThangaraja Ramakrishnan, Girish H. Dalbhanjan, Paul Jay Schafbuch
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Abstract
The present disclosure envisages a system and method for self-calibration of an actuator. The system comprises a pressure spike sensing and control circuit, a travel limit setting circuit and a profile generation circuit. The pressure spike sensing and control circuit is configured to check and set an operating pressure of the actuator. The travel limit setting circuit is configured to check and set the travel limit of the actuator. The profile generation circuit is configured to generate the profiles of a set of parameters of the actuator.
Claims13
A system for self-calibration of an actuator comprising:
- a memory configured to store a set of self-calibration rules;
- a pressure spike sensing and control circuit configured to check and set an operating pressure of said actuator based on sensed spike in said operating pressure;
- a travel limit setting circuit configured to check and set the travel limit of said actuator based on said set of self-calibration rules;
- a profile generation circuit configured to generate the profiles of a set of parameters of said actuator;
- and
- a processor cooperating with said memory, said pressure spike sensing and control circuit, said travel limit setting circuit and said profile generation circuit, and configured to extract said set of self-calibration rules from said memory and instruct said pressure spike sensing and control circuit, said travel limit setting circuit and said profile generation circuit to perform self-calibration of said actuator based on said set of self-calibration rules.
A method for self-calibration of an actuator, said method comprises following sequential steps:
- initializing actuation cycles of said actuator;
- detecting the instantaneous value of an operating pressure of said actuator and generating a pressure signal;
- converting said pressure signal and generating a first conditioned signal;
- detecting at least one spike in said first conditioned signal at a first instant of time;
- incrementing said operating pressure by a first predetermined value until a first spike is detected;
- setting said operating pressure to a second predetermined value if said first spike is detected;
- detecting at least one spike in said first conditioned signal at a second instant of time;
- incrementing said operating pressure by said first predetermined value until a second spike is detected;
- setting said operating pressure to a third predetermined value if said second spike is detected;
- generating a first error signal if no spikes are detected;
- converting said operating pressure to generate operating pressure data;
- storing said operating pressure data in said memory;
- re-initializing said actuation cycles of said actuator;
- detecting rotation of said actuator during said actuation cycles and generating a set of rotation signals;
- generating a set of second conditioned signals using said set of rotation signals;
- generating a set of travel limit signals using said set of second conditioned signals;
- storing said set of travel limit signals;
- generating operating torque profile data using said operating pressure data and said set of travel limit signals,
- storing said set of torque profile data in said memory,
- detecting a set of parameters of said actuator and generating a set of profile signals;
- generating a set of third conditioned signals using said set of profile signals;
- converting said set of third conditioned signals and generating a set of profile data;
- and
- storing said set of profile data.
Dependencies are inferred from the claim text.