摘要:
A method of and a system for receiving microwave beams from a plurality of power satellites (1) in space by way of a receiving antenna (3). By controlling the directions of a plurality of microwave beams (7) to be transmitted from the plurality of power satellites (1), the plurality of power satellites (1) direct the plurality of microwave beams (7) into an aperture surface of the receiving antenna (3), respectively, so that the plurality of microwave beams (7) can be dispersively received at a number of different positions (6) on the aperture surface of the receiving antenna (3), so as to level the energy distribution of the microwaves received on the aperture surface of the receiving antenna (3).
摘要:
A tether (Figure 6) having the special technical feature of multiple primary load-bearing lines (601, 603) and normally slack secondary lines (605, 603). These primary and secondary lines are connected together with knotless, slipless interconnections so the tether maintains high strength and some of the lines can be cut without failure of the tether when it is operated near the ultimate failure load of the material from which it is constructed. This tether can safely carry (Figure 31) load hundreds of times longer than prior art tethers in harsh environments where a single-line tether experiences a substantial risk of failure. The specific industrial applications of an electrodynamic tether system to deorbit satellites and a low Earth orbit to lunar surface tether transport system are all part of the general innovative concept of the invention.
摘要:
A spacecraft, such as a satellite (20) in geosynchronous orbit, is powered using at least two independently controllable batteries (30), such as lithium ion batteries, operably connected to the power-consuming components (22) of the spacecraft (20). Each battery (30) is operable in a higher-temperature range and inactivated in a lower-temperature range. The first battery (30a) and the second battery (30b) are operated in the higher-temperature range during a first period of time. The first battery (30a) is thereafter operated in the higher-temperature range during a second period of time, with the second battery (30b) being non-operational and in the lower-temperature range during the second period of time. The first battery (30a) and the second battery (30b) are thereafter operated in the higher-temperature range during a third period of time. The second battery (30b) is thereafter operated in the higher-temperature range during a fourth period of time, with the first battery (30a) being non-operational and in the lower-temperature range during the fourth period of time. The operable battery or batteries (30) may be operated through a partial charging/discharging cycle. This alternating operation prolongs the lifetimes of the batteries (30).
摘要:
A vehicle, such as a missile, includes a propulsion unit (44) and a fuel system (42,45,10,43) supplying fuel to the propulsion unit (44). The fuel system (42,45,10,43) includes a filter assembly (10) through which the fuel passes to the propulsion unit (44). The filter assembly (10) includes a filter element (12) having a first bubble point with the fuel sufficient to prevent the passage of gas through the element (12) when the fuel and a gas are passed to the filter element (12) and the vehicle is subjected to accelerations of between ± 1g and ± 10g. The first bubble point will generally be at least 40 mbar. The element helps to prevent the passage of gas to the propulsion unit so as to maximise the amount of fuel passed to the unit (44) before operation of the unit (44) is affected by air.
摘要:
Es wird ein modulares Schaltungs-, Sicherungs- und Aufbereitungssystem für Mittelspannungsgleichstrom-Netze beschrieben, daß durch ein modulares Konzept charakterisiert ist und bei dem ein fest installierbares Basisgehäuse für passive Bauelemente und mindestens ein standardisiertes Einschubelement für aktive Bauelemente zum austauschbaren Einsetzen in das Basisgehäuse vorgesehen ist. Dieses Schaltungssystem ist insbesondere zur Verwendung in der Raumfahrt vorgesehen, es kann jedoch auch überall dort eingesetzt werden, wo eine hohe Zuverlässigkeit und lange Lebensdauer bei einfacher Wartung gefordert.
摘要:
A device for equalizing thermal dissipation between radiator panels (28, 30) of a satellite comprises a plurality of radiator panels (28, 30) mounted on said satellite. A plurality of power sources (32, 36) is mounted on said radiator panels (28, 30) such that each radiator panel (28, 30) has at least one power source (32, 36) mounted thereon. Further, a load (34) is mounted adjacent one of said power sources (32, 36). The load (34) is capable of inhibiting said adjacent power sources (32, 36) from supplying power to the load (34) and causing said nonadjacent power sources (32, 36) to supply power to the load. Alternatively, the load is capable of controlling current supplied by said power sources (32, 36) such that said thermal dissipation of said radiator panels (28, 30) is equalized.
摘要:
Le satellite ayant une charge utile, destiné à être stabilisé à poste autour de trois axes sur une orbite géostationnaire, comporte une structure qui a des parois faisant face au Nord et au Sud lorsque le satellite est à poste et qui porte au moins une batterie d'accumulateurs. La batterie, ou chaque batterie d'accumulateurs (24) est constituée de cellules (32) montées sur un châssis ayant une semelle (31) orientée Nord-Sud et solidaire mécaniquement de flancs (33) faisant face au Nord et au Sud lorsque le satellite est à poste, lesdits flancs (33) portant ou constituant des radiateurs thermiques reliés thermiquement entre eux et avec les cellules (32).
摘要:
A magnetic torquing system for a spacecraft using conducting coils is disclosed. In one embodiment, the conductors (44, 46) on a spacecraft's (10) solar wing (28, 30) which connect the solar cell strings (38) to the voltage controller (48) are wired to produce a magnetic torque which can be regulated by shunting individual strings to ground (52) or by opening a string circuit. This embodiment does not require the extra weight of a coil because the panel's solar string produces the torque normally produced by an additional coil. In another embodiment, a coil (44, 46) is wired between a shunting switch (54) in the spacecraft voltage controller (48) and a ground (32) so that shunting a string to ground (52) supplies current first to the coil to generate a magnetic torque in the desired direction.
摘要:
A propellant immobilizing system and method in which propellant motion in the propellant storage tanks (22) is reduced or eliminated during velocity change maneuvers to reduce disturbance torques acting upon the spacecraft (10) and improving the spacecraft attitude pointing performance. The thrusters (14, 16, 18 or 20) are fired to produce a small impulse in the direction of the desired velocity change to begin motion of the propellant within the fuel tank in the opposite direction. After the fuel has moved within the tank to a location in which the propellant center of mass is aligned with the propellant tank (22) center of curvature in the direction of the desired velocity change, thrusters (14, 16, 18 or 20) are again fired to produce a force in the direction of the current velocity of the propellant center of mass to stop the propellant center of mass relative to the propellant tank (22). With the center mass of the propellant now aligned with the propellant tank center of curvature in the direction of the desired velocity change, the thrusters (14, 16, 18 or 20) are again fired to produce the desired velocity change with the propellant center of mass now being trapped in the propellant tank such that additional motion of the propellant is inhibited. After completion of the maneuver, the propellant gradually migrates back to its original position due to the influence of a propellant management device within the propellant tank.