Abstract: The present invention comprises a relay control circuit that provides highly efficient and reliable control for devices that perform in demanding applications such as space. Multiple levels of redundant function control are provided by redundant actuators that perform mechanical operations. Each actuator is driven by redundant motors for increased reliability. Motor current sensing is provided to determine arrival of the actuator at mechanical stops, which are located at the full deploy position. Limit switches also sense when the actuators are in the full deploy position. In addition, multiple control signal so are required to initiate certain critical operations. Critical operations also are performed redundantly for increased reliability.

Abstract: A rocket-powered, air-deployed, lift-assisted booster vehicle (ALBV) is disclosed for efficiently carrying small payloads to orbital, supraorbital or suborbital altitudes and velocities. The ALBV is secured beneath a conventional carrier aircraft and dropped therefrom at launch altitude and velocity, which contributes significant total energy to the ALBV's ascent trajectory. The ALBV has wings, which generate aerodynamic lift to assist in vehicle ascent, and tail fins, which perform attitude control while the vehicle is in the sensible atmosphere. After drop launch, an innovative "vertical-S" maneuver is performed using aerodynamic control, causing the ALBV to ascend on a near-theoretical optimal trajectory. In the preferred embodiment, the wings and tail fins are jettisoned as the vehicle exits the sensible atmosphere and aerodynamic lift ceases.

Abstract: An electronic sequencing system comprised of two groups of three identically operating sequencers and circuitry that combines the outputs of these sequencers so that accurate, flexible and reliable sequencing of devices is obtained. Each sequencer is comprised of a microprocessor, memory, and peripheral circuits. The individual sequencer outputs are combined such that at least one of the corresponding system outputs will activate the device to be sequenced if at least two of three corresponding individual sequencer outputs signal that the device should be activated. Additional reliability is obtained by combining the outputs of each group of the identically operating sequencers to control the devices to be sequenced. Reset circuitry is also provided to simultaneously reset the sequencers and to prevent premature outputs from activating the devices to be sequenced.

Abstract: A novel apparatus for supporting a payload in the cargo bay of a reusable space vehicle, like the orbiter of the NASA Space Transportation System (STS). In the preferred embodiment, a plurality of pad assemblies which are attached to a cradle located in the cargo bay of the orbiter. The pad assemblies are mounted at intervals along the inside surface of the cradle and can be adjusted in the radial direction by means of a screw adjustment. Each pad assembly comprises a pad covering, a rocker pad, and an alignment and adjustment apparatus. The pad covering is bonded to the rocker pad and makes a bearing connection with the payload. The pad covering comprises a plurality of elastomeric pads interleaved with metal sheets. The outer surface of the pad covering is shaped to accommodate a cylindrical payload. The rocker pad is attached to the cradle by means of the alignment and adjustment apparatus.

Abstract: A mobile buildup apparatus for transporting, supporting and protecting an upper stage rocket and a mated spacecraft between and in the various facilities through which it must pass prior to their being loaded into the cargo bay of an orbiter of NASA's Space Transportation System and transported into space. The mobile buildup apparatus comprises a transport system, support structure and protective cover. The transport system comprises a pair of semitrailers attached side-by-side removable gooseneck assembly and a removable gooseneck dolly with pintle-hook are attached to the front end of the transport system, and air ride axles to minimize shock and vibration. The support structure comprises an upper stage assembly stand and an access platform both of which are mounted on the mobile buildup apparatus to provide support for and access to, respectively, the upper stage and the mated spacecraft during assembly, testing and ground integration operations. A protective cover also is provided.