摘要:
A landing shock absorber for air loads or pilotless aircraft (10) equipped with brake parachutes has at least one inflatable landing shock absorbing bag (11) made of an inflatable inner bag (13) and of an outer bag (14) that encloses the inner bag (13). In order to easily modify the shock absorbing characteristics of the landing shock absorbing bag (11) and to individually adapt it to its intended use, the inner bag (13) is made of a pressure-tight, plastically deformable sheet and is subdivided into several inflatable air chambers (15, 16) that communicate through at least one hole (17), whereas the outer bag (14) is made of a tear-resistant fabric with low air permeability and has a plurality of precisely defined throttle openings (21).
摘要:
A deployment hinge apparatus (120) comprises a stationary bracket (122) and a hinge arm (124) supporting an operating structure (126) and pivotally mounted on the stationary bracket for moving the operating structure between a stowed position and a deployed position. A bearing (128) is provided to pivotally mount the hinge arm (124) on the stationary bracket (122). A first stop (154) is provided on the stationary bracket (122), and a second stop (156) is provided on the hinge arm (124) and positioned to engage the first stop (154) when the hinge arm (124) is in the deployed position. A spring (146) biases the hinge arm (124) towards the deployed position with the second stop (156) engaged with the first stop (154), so as to retain the hinge arm (124) in the deployed position.
摘要:
A transmitting apparatus for use in non-geostationary satellites which allows compliance with the restrictions placed on PFD even when the Earth is located between the geostationary satellite and the non-geostationary satellite. The transmitting apparatus 10 for use in non-geostationary satellites having a transmitting section 16 which sends a transmitting signal to the geostationary satellite, comprises an Earth-sensing section 19 for detecting the presence of the Earth in the direction of transmission and a transmission direction-shifting section 20 for shifting the direction of transmission of the transmitting signal in response to detection of the Earth-sensing section 19 to prevent the Earth from being exposed to the transmitting signal. Instead of the transmission direction-shifting section 20, there may be used a power supply-suspending section which automatically suspends power supply to the transmitting section 16 thereby stopping transmission of the transmitting signal.
摘要:
Deployment hinge apparatus comprises a stationary U-shaped bracket including a flange defining a retention recess. A hinge arm for supporting an operating structure such as a communication antenna reflector is pivotally mounted on the stationary bracket for movement between a stowed position and a deployed position. The hinge arm includes a deployment and latching cam which extends to a projecting nose member. A latch arm is pivotally mounted at one end to the stationary bracket and includes a cam follower at its other end operatively engageable with the cam. A spring biases the cam follower into engagement with the cam and is thereby effective to rotate the hinge arm from the stowed position to the deployed position such that, in the deployed position, the nose member and the cam follower are together snugly received in the retention recess, locking the hinge arm in the deployed position. In a simplified embodiment, which does not utilize a latch arm or a cam and cam follower, a bearing pivotally mounts the hinge arm on the stationary bracket. A first stop member is provided on the stationary bracket and a second adjustable stop member is provided on the hinge arm positioned to engage the first stop member when the hinge arm is in the deployed position. A spring biases the hinge arm toward the deployed position with the second stop member engaged with the first stop member and is effective to retain the hinge arm in the deployed position.
摘要:
A waveguide absorber which stands high mechanical and thermal stresses is characterised in that a body (4) made of absorbing material is clamped between the walls (5, 6) of the waveguide. At least an area (5) of the wall adjacent to the body (4) is flexible. A force acting on the flexible wall area (5) presses it against the body (4).
摘要:
A helical antenna structure is deformable and capable of being stowed in a small volume. At deployment, the helical antenna structure uses the stored strain energy in its resilient helices to revert to its original shape without the use of any outside force. Multiple antenna structures can be linked using a plurality of resilient lenticular shaped hinges.
摘要:
A helical antenna structure is deformable and capable of being stowed in a small volume. At deployment, the helical antenna structure uses the stored strain energy in its resilient helices to revert to its original shape without the use of any outside force. Multiple antenna structures can be linked using a plurality of resilient lenticular shaped hinges.