Abstract: An inertial measurement unit includes a housing with openings to permit fluid communication between at least one pressure source and two distinct cavities within the housing. The cavities are separated by an inertial sensor assembly coupled to a vibration isolator assembly. The pressure in the cavities may be adjusted or tuned to change a natural frequency of the inertial measurement unit, thus allowing the unit to be configured and even optimized for a variety of different applications. By adjusting the pressure in the respective cavities, gas squeeze film damping effects may be optimized when the inertial measurement unit undergoes a shock event and/or when the inertial measurement unit experiences vibration loads during operation. In one embodiment, the vibration isolator assembly includes perforations to permit fluid communication between the first and second cavities during specific operational events.

Abstract: An inertial sensor system has a base, an inertial sensor, and an isolator mount. The isolator mount fastens the inertial sensor to the base, and the isolator mount includes a bolt and first and second vibration absorbing members. The bolt is inserted through the inertial sensor and the base, the first vibration absorbing member is between the bolt and the inertial sensor, and the second vibration absorbing member is between the inertial sensor and the base. The isolator mount isolates the inertial sensor from vibration, shock, and/or acoustic noise transmitted from a host system through the base.

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.