Isolator assembly with adjustable preload for damping air load forces
An isolator assembly is configured for damping vibrations of a sensor deployed outside of an aircraft. The isolator assembly includes a platform configured for mechanically supporting the sensor, a lift mechanism configured to raise and lower the platform for stowing the sensor inside the aircraft and deploying the sensor outside the aircraft, and a plate secured inside the aircraft beneath the platform. The plate includes a through-hole for the sensor to extend through. A pin extends below the platform and an isolator mount is disposed on a top side of the plate. The isolator mount includes a slot configured to receive the pin upon deploying the sensor outside the aircraft. The platform and the plate are configured to stabilize the sensor and the isolator assembly is configured to damp vibrations imparted on the sensor by the airstream during flight.
1 . An isolator assembly, comprising:
a platform configured for being raised upwards and lowered downwards;
a pin having first end and a second end opposite the first end, wherein the pin is mechanically coupled to the platform via the first end, and the second end extends downwardly below the platform; and
an isolator mount fastened to a plate, wherein the isolator mount comprises:
a vibration-damping material;
a slot configured to receive the pin, wherein the slot comprises a seat having a conical shape around a circumference of the slot at an upper side of the isolator mount; and
upon lowering the platform downwards, the pin is inserted into the isolator mount such that vibrational motion from the platform is damped via the isolator mount.
2 . The isolator assembly of claim 1 , wherein the platform is configured for supporting a sensor to be deployed beneath an aircraft when lowered downwards, and the isolator mount is configured to damp vibrations caused by airstream loads onto the sensor during flight of the aircraft.
3 . The isolator assembly of claim 1 , wherein the second end of the pin comprises a tapered end.
4 . The isolator assembly of claim 1 , wherein the isolator mount comprises:
an outer portion comprising the vibration-damping material; and
an inner portion disposed within the outer portion, wherein the inner portion comprises a metal configured to form the slot and the slot is substantially cylindrical.
5 . The isolator assembly of claim 1 , wherein the pin comprises a shoulder having a conical portion configured to match the seat such that travel of the pin is limited of the pin into the slot.
6 . The isolator assembly of claim 1 , wherein the pin comprises a tapered end and the seat comprises a conical cup configured to receive the tapered end.
7 . The isolator assembly of claim 6 , wherein the slot comprises internal threads and the seat comprises external threads configured to cooperate with the internal threads such that a position of the seat within the slot is adjustable via the threads.
8 . The isolator assembly of claim 6 , wherein the pin is configured to insert into the isolator mount to provide a preload force between the platform and the isolator mount, and an adjustment of the seat is configured to adjust an amount of the preload force.
9 . An isolator assembly for damping vibrations of a sensor deployed outside of an aircraft, the isolator assembly comprising:
a platform configured for mechanically supporting the sensor;
a lift mechanism configured to raise and lower the platform for stowing the sensor inside the aircraft and deploying the sensor outside the aircraft;
a plate secured inside the aircraft beneath the platform, wherein the plate comprises a through-hole for the sensor to extend therethrough;
a pin extending below the platform; and
an isolator mount disposed on a top side of the plate, wherein the isolator mount comprises a slot configured to receive the pin upon deploying the sensor outside the aircraft,
wherein the isolator mount, the platform, and the plate are configured to stabilize the sensor.
10 . The isolator assembly of claim 9 , wherein the isolator mount comprises:
an inner portion comprising a metal shaped to form the slot;
an outer portion comprising a ring of vibration-damping material surrounding the inner portion; and
a pair of flanges configured for fastening the isolator assembly to the plate.
11 . The isolator assembly of claim 10 , wherein the slot comprises:
an opening at a top side of the slot, wherein the opening comprises a conical taper with a wider outer portion and a narrower inner portion; and
a cylindrical channel extending from the narrower inner portion through to a bottom side of the slot.
12 . The isolator assembly of claim 11 , wherein the slot comprises a seat and the pin comprises a shoulder, and the seat and the shoulder are configured to interface with each other when the pin is received in the slot.
13 . The isolator assembly of claim 12 , wherein the seat is formed in the conical taper of the opening.
14 . The isolator assembly of claim 11 , comprising a seat having a conical cup, wherein the seat is configured to be inserted through the bottom side of the slot.
15 . The isolator assembly of claim 14 , wherein an exposed end of the pin comprises a conical taper configured to match the conical cup of the seat.
16 . The isolator assembly of claim 14 , wherein the cylindrical channel comprises interior threads and the seat comprises exterior threads configured to cooperate with the interior threads such that the seat is threaded into the slot.
17 . The isolator assembly of claim 16 , wherein a position of the seat within the slot is adjustable via the interior and exterior threads.
18 . The isolator assembly of claim 17 , wherein contact between the pin and the seat comprises a preload that is adjustable by adjusting the position of the seat within the slot.
19 . The isolator assembly of claim 9 , wherein the isolator assembly comprises a plurality of pins and a corresponding plurality of isolator mounts configured to damp vibrations of the sensor.