Method of setting control data in an active vibration isolation control system and a control method thereof

• US 7,747,353 B2
• Filed: 02/18/2005
• Issued: 06/29/2010
• Est. Priority Date: 02/20/2004
• Status: Active Grant

• Current Assignee: Aisin Seiki Co., Ltd. (Aisin Corp.)
• Original Assignee: Aisin Seiki Co., Ltd. (Aisin Corp.)
• Inventors: Ichikawa, Hiroyuki, Muramatsu, Atsushi, Fushimi, Takehiko, Mizushima, Daichi
• Primary Examiner(s): Rodriguez; Paul L
• Assistant Examiner(s): Rodriguez; Carlos Ortiz
• Application Number:
  US11/060,701
• Publication Number:
  US 20050184214A1
• Time in Patent Office: 1,957 Days
• Field of Search: 700/280, 700/28, 700/45, 700/89, 720/651, 720/688, 73/18.2, 73/350.9, 73/542.4, 738/624.1, 267 90136-1417, 702/54, 702/56, 335 87- 98
• US Class Current: 700/280
• CPC Class Codes: F16F 13/26 characterised by adjusting or regulating devices responsive to exterior conditions F16F13/101 takes precedence
• CPC Class Codes: F16F 15/002 characterised by the control method or circuitry control of mechanical oscillations per se G05D19/00
• CPC Class Codes: F16F 15/027 comprising control arrangements F16F15/0237 takes precedence
• CPC Class Codes: G05B 13/041 in which a variable is automatically adjusted to optimise the performance
• CPC Class Codes: G05D 19/02 characterised by the use of electric means

Abstract

A method of setting control data by an active vibration isolation control system includes the steps of selecting, when a frequency of a pulse signal actually detected is superior to a predetermined frequency, appropriate control data selected from among predetermined data maps incorporating control data capable of securing, in accordance with various vehicle driving conditions respectively, a control condition in which operation of the vibrator is preferably controlled, calculating a deviation between the appropriate control data commensurate with the actual vehicle driving condition at the time of controlling and actually detected data representing vibration subjected to a vehicle specific position, the actually detected data obtained in terms of a same physics amount as a physics amount of the control data, and modifying the appropriate control data on the basis of the calculated deviation.

Claims

1. A method of setting control data used in an active vibration isolation control system for attenuating vibration of a vehicle in such a manner that the control data, which is based on a periodical pulse signal emanating from a vibration-producing source of the vehicle, is applied to an active mount which is attached with a vibrator and which is mounted on a vehicle, the method comprising:

using a control device which is associated only with the vehicle to set the control data selectively either by use of an adaptive control algorithm when a frequency of the pulse signal from the vibration-producing source of the vehicle is higher than a predetermined frequency or by selecting map-based control data from a data map for establishing a map-based control of the vibration when the pulse signal from the vibration-producing source of the vehicle is not higher than the predetermined frequency;

using the control device to calculate a deviation between the map-based control data and actually detected data representing the vibration at a specific position of the vehicle; and

using the control device to modify the map-based control data on a basis of the calculated deviation,

wherein the control data is compensated on a basis of the modified map-based control data.

2. The method according to claim 1, wherein the deviation is weighted by a filter coefficient.

3. The method according to claim 2, wherein the filter coefficient is variable.

4. The method according to claim 3, wherein the filter coefficient is set to be a finite value equal to or less than 0.2, other than 0.

5. The method according to claim 1, wherein the map-based control data is selected in accordance with a current vehicle driving condition, and

wherein the current vehicle driving condition is determined on a basis of at least one of:

an engine rotational frequency;

any shift position of a transmission; and

any on-and-off state of an air-conditioning switch, or on a basis of a combination of the engine rotational frequency, any of the shift positions of the transmission and any of the on-and-off states of the air-conditioning switch.

6. The method according to claim 1, wherein the predetermined frequency is set within a range between 40 Hz and 65 Hz.

7. The method according to claim 6, wherein the predetermined frequency is set at 50 Hz.

8. The method according to claim 1, wherein the actually detected data representing the vibration at the specific position of the vehicle is detected by a detecting unit and has an output form consisting of actual amplitude and actual phase in terms of voltage.