Retrieving pre-determined controller parameters to isolate vibrations in an authorized payload

Patent metadata

Field	Value
Publication number	US-9846425-B2
Application number	US-201514674446-A
Country	US
Kind code	B2
Filing date	Mar 31, 2015
Priority date	Mar 31, 2015
Publication date	Dec 19, 2017
Grant date	Dec 19, 2017

Abstract

A method performed by one or more processing devices for ensuring that a vehicle seat top is qualified for use with a seat base for a vehicle seat, the method comprising: receiving information that identifies a type of vehicle seat top for coupling to the seat base; verifying that the vehicle seat top is authorized for use with the seat base; and in response to verifying, retrieving, based on the received information that identifies the type of vehicle seat top, pre-determined values of controller parameters of a closed loop control system for isolating vibrations from the vehicle seat top, wherein the predetermined values of the controller parameters are specifically tuned for the vehicle seat top.

First claim

What is claimed is:

1. A method performed by one or more processing devices for ensuring that a payload is qualified for use with a vibration isolation base in a system, the method comprising:
receiving information that identifies a type of payload for coupling to the vibration isolation base;
verifying that the payload is authorized for use with the vibration isolation base; and
in response to verifying that the payload is authorized for use with the vibration isolation base,
retrieving, based on the received information that identifies the type of payload, pre-determined values of controller parameters that include one or more filter coefficients of a closed loop control system for isolating vibrations from the payload, wherein the pre-determined values of the controller parameters remain constant or vary within a predefined range during a particular operational mode of the vibration isolation base with the payload, and wherein the pre-determined values of the controller parameters are specifically tuned for the payload such that the pre-determined values of the controller parameters are usable by the closed loop control system to reduce vibrations of the payload while satisfying a stability condition associated with the closed loop control system.

2. The method of claim 1 , wherein verifying that the payload is authorized for use with the vibration isolation base comprises:
accessing, from a data repository, information indicative of authorized payloads; and
determining a correspondence between information indicative of one of the authorized payloads and the received information.

3. The method of claim 1 , wherein retrieving comprises:
retrieving, from memory in the payload or in the vibration isolation base, the pre-determined values of the controller parameters.

4. The method of claim 1 , wherein retrieving comprises:
retrieving, from a data repository, the pre-determined values of controller parameters, with the pre-determined values being mapped in the data repository to the information that identifies the type of payload.

5. The method of claim 1 , wherein a plant comprises the payload and the vibration isolation base, wherein the plant is a seat in a vehicle, and wherein the payload comprises a seat top of the seat in the vehicle.

6. The method of claim 1 , wherein at least one of the controller parameters is a parameter for setting a feedback gain as a function of a frequency in the closed loop control system.

7. The method of claim 1 , further comprising:
determining if the closed loop control system is stable in a plurality of different operating conditions associated with the authorized payload;
wherein the controller parameters are selected such that the closed loop control system is stable under all operating conditions associated with the authorized payload.

8. The method of claim 7 , wherein the operating conditions comprise the payload being tilted, the payload moving forward and backward, the payload being operated over a positional adjustment range, and the payload being stable over an entire range of driver weights.

9. The method of claim 7 , wherein the plurality of different operating conditions are based on one or more of a mass of a driver, adjustment of a position of the payload, and an amount of inertia of the payload.

10. The method of claim 1 , wherein the one or more processing devices comprise a seat base controller, and wherein the closed loop control system comprises the seat base controller and the payload.

11. The method of claim 1 , wherein the values of the controller parameters are not adaptively modified during operation of the system.

12. The method of claim 1 , further comprising performing system identification by:
measuring a transfer function of the payload;
comparing the measured transfer function to a plurality of stored transfer functions for the payload;
determining, based on comparing, a stored transfer function that substantially matches the measured transfer function; and
confirming, based on the determined match, that the payload is an authorized payload.

13. The method of claim 1 , wherein a controller is programmed with information specifying normal signal ranges that represent normal system states, and wherein the method further comprises:
detecting, in the controller, an abnormal operating system state, when signals are received that are outside the normal signal ranges; and
operating the controller in a passive mode, until the detected abnormal operating system state clears.

14. The method of claim 1 , further comprising:
prior to operation of the system, identifying the authorized payload and selecting the pre-determined values of the controller parameters;
applying the pre-determined values of the controller parameters to the closed loop control system; and
determining, based on applying, whether the closed loop control system has adequate gain and phase margin over the closed loop control system operating bandwidth.

15. The method of claim 14 , further comprising:
when the closed loop control system has an inadequate gain and/or phase margin in a frequency range, adjusting a gain of closed loop control system in at least the frequency range.

16. The method of claim 14 , further comprising:
when the closed loop control system has an adequate gain and phase margin, enabling control of the payload.

17. A method performed by one or more processing devices for ensuring that a vehicle seat top is qualified for use with a seat base for a vehicle seat, the method comprising:
receiving information that identifies a type of vehicle seat top for coupling to the seat base;
verifying that the vehicle seat top is authorized for use with the seat base; and
in response to verifying that the vehicle seat top is authorized for use with the seat base,
retrieving, based on the received information that identifies the type of vehicle seat top, pre-determined values of controller parameters that include one or more filter coefficients of a closed loop control system for isolating vibrations from the vehicle seat top, wherein the predetermined values of the controller parameters are specifically tuned for the vehicle seat top such that the pre-determined values of the controller parameters are usable by the closed loop control system to reduce vibrations of the vehicle seat top while satisfying a stability condition associated with the closed loop control system.

18. The method of claim 17 , wherein verifying that the vehicle seat top is authorized for use with the seat base comprises:
accessing, from a data repository, information indicative of authorized vehicle seat tops; and
determining a correspondence between information indicative of one of the authorized vehicle seat tops and the received information.

19. The method of claim 17 , wherein retrieving comprises:
retrieving, from memory in the vehicle seat top or in the seat base, the pre-determined values of the controller parameters.

20. The method of claim 17 , wherein retrieving comprises:
retrieving, from a data repository, the pre-determined values of controller parameters, with the pre-determined values being mapped in the data repository to the information that identifies the type of vehicle seat top.

21. The method of claim 17 , wherein at least one of the controller parameters is a parameter for setting a feedback gain as a function of a frequency in the closed loop control system.

22. The method of claim 17 , further comprising:

Assignees

• Bose Corp

Inventors

• Parison James A

Classifications

• B60N2/522

  characterised by dampening means · CPC title

• G05B2219/39199

  Active vibration absorber · CPC title

• G05B19/406 Primary

  characterised by monitoring or safety (G05B19/19 takes precedence) · CPC title

• B60N2/501 Primary

  actively controlled suspension, e.g. electronic control · CPC title

• B60N2002/0272

  Operations & Transport · mapped topic