Apparatus and method for diagnosing sliding mode control system
AssigneeUnisia Jecs Corporation
InventorsHajime Hosoya, Kenichi Machida
Life of this patent
Estimating the term…
Abstract
In a sliding mode control system to feedback control a control object amount to a target value by calculating an operation amount based on a non-linear term calculated corresponding to a switching function and a linear term, an abnormality judgment signal is output when an operation amount by the non-linear term does not change within a predetermined time from when a predetermined period of time has elapsed after the target value has changed.
Claims10
An apparatus for diagnosing a sliding mode control system in which an operation amount is calculated based on a non-linear term calculated corresponding to a switching function and a linear term, to feedback control a control object amount to a target value, said apparatus comprising;
- abnormal judgment signal output means for outputting an abnormal judgment signal of said sliding mode control system based on a change of said operation amount within a predetermined time from when a predetermined period of time has elapsed after said target value has changed.
A method of diagnosing a sliding mode control system in which an operation amount is calculated based on a non-linear term calculated corresponding to a switching function and a linear term, to feedback control a control object amount to a target value, said method comprising the steps of:
- detecting a time when a predetermined period of time has elapsed after said target value has changed;
- judging if said predetermined period of time is within a predetermined time from the elapsed time;
- and
- outputting an abnormal judgment signal of said sliding mode control system based on a change of said operation amount in said predetermined time.
Dependencies are inferred from the claim text.