Abstract: A method and apparatus seamlessly blends multiple images. The multiple images are generated by independent processors, each processor producing a portion of the field of view from a defined viewpoint. Object polygons are introduced along the edges of each image that adjoin another of the images. Each of the polygons is assigned an opacity gradient which modulates the transparency of the polygon from fully transparent nearest the image center to fully opaque nearest the image edge. The images are projected with the polygons overlapping so that the images blend seamlessly together. A calibration apparatus is provided to minimize visual artifacts where the images overlap. Test patterns are projected and viewed with a video camera. The camera output is digitized and analyzed to adjust the polygon widths and opacity gradients until the overlap cannot be visually observed.

Abstract: A modular, interactive, reconfigurable simulation system is designed to provide a variety of simulation experiences. The system has a distributed state machine architecture to facilitate reconfiguration and technological update. A typical simulation system constructed in accordance with the present invention includes a plurality of simulator stations. Each station includes a seat for the player/operator and controls and displays that are appropriate for the simulation experience. Each simulator station is preferably mounted on a motion base to provide the player/operator with sensory inputs consistent with motions of the simulated vehicle. Each simulator station is controlled by an associated host computer. The host computer maintains a state vector which describes the current state of the associated simulated vehicle within the simulated world. The host computer calculates interaction between moving objects and the underlying terrain data base by mapping 3D terrain objects into 2D maps.

Abstract: A flight control system that provides energy management for an aircraft. The flight control system includes an energy control system which generates a first error signal that is a function of an actual energy characteristic and a threshold energy characteristic. The energy characteristic may be the bleed rate of the aircraft. The error signal is converted into a control surface command signal which moves the control surface(s) of the aircraft, accordingly. The control system limits the movement of the control surface(s) so that the actual energy characteristic does not exceed the threshold energy characteristic. The energy control system can be coupled to a nominal control system which generates a second error signal that is a function of a pilot input command and a feedback signal which is indicative of the present state of the aircraft. The second error signal can also be converted to a control surface command signal which moves the control surface(s) of the aircraft.

Abstract: Inflatable rubber dinghies, familiar around most wharf areas, are made safe for scuba tank users by a plurality of interlocking rigid base sections which insert laterally across the floor of the dinghy and over both inflatable side tubes of the dinghy. Each base section includes a support for holding a scuba tank in an upright position and each such support is secured to a rail, running front-to-back along the axis of the dinghy, to which the base sections are secured. The interlocking inserts not only provide for secure transport of the scuba tanks but do so in a way which occupies little space and provides for increased stability for the dinghy.

Abstract: A pontoon for a catamaran includes recesses for a plurality of scuba tanks where the tanks protrude above the top surfaces of the pontoon. The exposed portions of each of an adjacent pair of tanks provide a support for a mating removable seat back. Each tank is supported by a platform at the bottom of each recess below which is a chamber which includes an air-inflatable bladder. Each bladder includes an air hose with means to connect the hose to an air supply such as a scuba tank. The air is used to expand the bladder to expel any water which may accumulate in the chamber. The pontoon not only provides increased comfort for passengers but also provides for increased seaworthiness. The structure is compatible with collapsible and self trailoring catamaran configurations.