Rotating shaft damping with electro-rheological fluid
US-2015369326-A1 · Dec 24, 2015 · US
System and method for vibration control in a rotorcraft using an adaptive reference model algorithm
US9027873B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9027873-B2 |
| Application number | US-201013202731-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 1, 2010 |
| Priority date | Feb 27, 2009 |
| Publication date | May 12, 2015 |
| Grant date | May 12, 2015 |
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Abstract
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The adaptive reference model algorithm uses a gain scheduling feature combined with a customized Least-Squares routine as an adaptive method for adjusting feedback control so as to account for variations in Transfer Function (G), thereby optimizing the effectiveness of the Active Vibration Control (AVC) System. The Least-Squares routine identifies the transfer function in a background process without interruption of closed loop vibration control. This identification approach is accomplished without intentional interrogation of the AVC actuators and without intentional vibration level changes. For this adaptive control logic, the dynamic relationship between AVC actuators and AVC sensors is represented by a mathematical model of Transfer Function (G). The mathematical model of Transfer Function (G) is continuously updated by the Least-Squares routine. A feedback gain (H) is computed from the mathematical model of Transfer Function (G), and the feedback gain (H) is updated each time the mathematical model of Transfer Function (G) is updated.
First claim
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The invention claimed is: 1. A method for controlling vibration in a rotorcraft, comprising: measuring a fuselage vibration in the rotorcraft with a sensor, the fuselage vibration originating from a propulsion system of the rotorcraft; determining an actuator command signal with an adaptive reference model algorithm, wherein the determining of the actuator command signal with the adaptive reference model algorithm comprises one or more iterations of: continuously identifying a…
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Physics · mapped topic
Mechanical Engineering · mapped topic
- B64C27/001Primary
Operations & Transport · mapped topic
Physics · mapped topic
Operations & Transport · mapped topic
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Frequently asked questions
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- What does patent US9027873B2 cover?
- The adaptive reference model algorithm uses a gain scheduling feature combined with a customized Least-Squares routine as an adaptive method for adjusting feedback control so as to account for variations in Transfer Function (G), thereby optimizing the effectiveness of the Active Vibration Control (AVC) System. The Least-Squares routine identifies the transfer function in a background process w…
- Who is the assignee on this patent?
- Heverly Ii David E, Singh Rupinder, Pappas John, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification B64C27/001. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue May 12 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).