Vibration isolation system for an inertial sensor assembly

• US 5,890,569 A
• Filed: 06/06/1997
• Issued: 04/06/1999
• Est. Priority Date: 06/06/1997
• Status: Expired due to Term

• Current Assignee: Honeywell Incorporated (Honeywell International Inc.)
• Original Assignee: Honeywell Incorporated (Honeywell International Inc.)
• Inventors: Goepfert, Scott J.
• Primary Examiner(s): Butler, Douglas C.
• Application Number:
  US08/869,605
• Time in Patent Office: 669 Days
• Field of Search: 188/378, 188/379, 188/380, 267/136, 267/140.11-141.7, 248/562, 248/636, 248/638, 74/574, 244/118.1, 244/3.16, 73/510, 73/431, 73/504.18
• US Class Current: 188/378
• CPC Class Codes: F16F 15/08 with rubber springs grommet- or bushing-type resilient mountings F16F1/3732, F16F1/38; with springs made of rubber and metal arrangement of internal-combustion or jet-propulsion units B60K5/12; mounting of propulsion plants on vessels B63H21/30; mounting of vehicle drivers' cabs B62D33/0604
• CPC Class Codes: G01C 21/166 Mechanical, construction or arrangement details of inertial navigation systems

Abstract

Disclosed is a vibration isolator system for mounting an inertial sensor assembly (ISA) to a support that is subject to shock and vibration. The vibration isolator system includes a ring shaped elastomeric member, and ring shaped outer and inner members. Both the outer and inner members are fixed to the elastomeric member. In addition, the outer member is secured to the support and the inner member is secured to the ISA. The elastomeric member isolates the ISA from shock and vibration that may otherwise be transmitted from the support to the ISA.

Claims

1. A vibration isolator system for mounting an inertial sensor assembly to a support that is subject to shock and vibration, comprising:

a ring shaped elastomeric member;

a rigid, ring shaped outer member encircling the elastomeric member and being fixed thereto, the outer member adapted to be secured to a support; and

a rigid, ring shaped inner member encircled by the elastomeric member and being fixed thereto, the inner member adapted to be secured to an inertial sensor assembly, such that the elastomeric member isolates an inertial sensor assembly from shock and vibration that may otherwise be transmitted from a support to an inertial sensor assembly.

2. The vibration isolator system of claim 1, further including:

a coupling apparatus for attaching the inner ring of the vibration isolator system to an inertial sensor assembly so that an elastic center of the elastomeric member is aligned with a center of gravity of an inertial sensor assembly.

3. The vibration isolator system of claim 2 wherein the coupling apparatus includes:

an adjustment mechanism for permitting relative movement between the elastomeric member and an inertial sensor assembly so that the center of gravity of an inertial sensor assembly can be aligned with the elastic center of the elastomeric member after an inertial sensor assembly is attached to the inner ring.

4. The vibration isolator system of claim 3 wherein the adjustment mechanism includes a threaded region on the inner ring that mates with a cooperating threaded portion of an inertial sensor assembly to attach a sensor assembly to the inner ring, and permit linear movement of a sensor assembly along a longitudinal axis of a sensor assembly that is perpendicular to a plane defined by the elastomeric member, for aligning the elastic center with a center of gravity of the sensor assembly.

5. The vibration isolator system of claim 4 wherein the coupling apparatus further includes:

a stop mechanism for maintaining the position of an inertial sensor assembly on the inner ring once the alignment of the elastic center with a center of gravity of a sensor assembly is achieved.

6. The vibration isolator system of claim 5 wherein the stop mechanism includes a resilient member that provides a spring force that acts between the inner ring and an inertial sensor assembly to maintain the position of a sensor assembly with a center of gravity thereof aligned with the elastic center of the elastomeric member.

7. The vibration isolator system of claim 6 wherein the resilient member is an O-ring.

8. The vibration isolator system of claim 1 wherein the elastomeric member is manufactured of a silicone rubber elastomeric material.

9. A mounting apparatus for securing a housing for an inertial sensor assembly to a support that is subject to shock and vibration, comprising:

a housing for an inertial sensor assembly, the housing having a longitudinal axis and a lateral axis perpendicular to the longitudinal axis, a lateral center of gravity of the housing lying along the lateral axis;

a vibration isolator system connected to the support and having a center of elasticity, the vibration isolator system acting to isolate the housing for an inertial sensor assembly from shock and vibration that may otherwise be transmitted from a support to the housing; and

a coupling apparatus for attaching the vibration isolator system to the housing, the coupling apparatus including;

an adjustment mechanism for permitting relative movement between the vibration isolator system and the housing so that the lateral center of gravity of the housing can be aligned with the elastic center of the vibration isolator system.

10. The mounting apparatus of claim 9 wherein the adjustment mechanism includes a threaded region on the vibration isolator system that mates with a cooperating threaded portion on the housing to attach the housing to the vibration isolator system, and permit linear movement of the housing along the longitudinal axis for aligning the lateral center of gravity with the elastic center.

11. The mounting apparatus of claim 10 wherein the coupling apparatus further includes:

a stop mechanism for maintaining the position of the housing relative to the vibration isolator system once the alignment of the elastic center with the lateral center of gravity has been achieved.

12. The mounting apparatus of claim 11 wherein the stop mechanism includes a resilient member that provides a spring force, upon compression of the resilient member, that acts between a ledge section on the housing and a ledge region on the vibration isolator system to maintain the position of the housing relative to the vibration isolator system and maintain the alignment of the lateral center of gravity with the elastic center.

13. The mounting apparatus of claim 12 wherein the resilient member is an O-ring.

14. The mounting apparatus of claim 9 wherein the vibration isolator system includes:

an elastomeric member, the elastomeric member defining the elastic center of the vibration isolator system;

a first member fixed to the elastomeric member and adapted to be secured to a support; and

a second member fixed to the elastomeric member, the second member including the coupling apparatus.

15. The mounting apparatus of claim 14 wherein each of the elastomeric, first and second members is ring shaped, and wherein the first and second members are concentric with the elastomeric member.

16. The mounting apparatus of claim 15 wherein the first member is fixed to an outer side of the elastomeric member, and wherein the second member is fixed to an inner side of the elastomeric member.

17. The mounting apparatus of claim 16 wherein the elastomeric member is manufactured of a silicone rubber elastomeric material.