The Transportation Problems (TP) is a generic name given to a whole class of problems in which the transportation is necessary. The general parameters of TP are: A)Resources. The resources are those elements that can be transported from sources to destinations. Examples of discrete resources are: goods, machines, tools, people, cargo; continuous resources include: energy, liquids and money. B)Locations. The locations are points of supply, recollection, depot, nodes, railways stations, bus stations, loading port, seaports, airports, refueling depots or school. C)Transportation modes. The transportation modes are the form of transport some resources to a locations. The transportation modes use the water, space, air, road, rail, and cable. The forms of transport has different infrastructure, capacity, times, activities and regulations. Example of transportation modes are ship, aircraft, truck, train, pipeline, motorcycle and others.
Space transportation. Space transportation carries resources from locations to other locations by suborbital and orbital flights in the upper atmosphere and the space by Hall Electric propulsion or similar. •Resources: Military-owned transportation resources, Cargo or passengers, personnel, fuel (LH2), Oxydizer (LOX), propellants (LOX and LH2 at given mixture ratio). •Locations: Earth spaceport (ES), Low Earth Orbit (LEO), Geostationary Earth Orbit (GEO), Lagrange Point L1 (L1), Low Lunar Orbit (LUO), Lunar SpacePort (LUS), Lagrange Point L2 (L2), Planetary escape mission (PLA), Mars Spaceport (MAS), Space Operations Center, Lunar Service Center, Lunar Propellant Production Facility and others. •Transportation mode: rocket-powered aircraft, nuclear powered aircraft, spacecraft, space shuttle, space, spaceplanes, rockets, missiles, and advanced Hall electric propulsion, Crew Exploration Vehicle (CEV), Automated Transfer Vehicle (ATV), Evolved Expendable Launch (EELV), National Aerospace Plane (NASP), Transatmospheric Vehicle (TAV), Orbital Space Plane, Next Generation Launch Technology, Winged Shuttle (WSLEO), Expendable Inter-orbital Ferry Vehicle (EIOFV), Reusable Inter-Orbital Ferry Vehicle (RIOFV), spaceship.
The Space Transportation Problem Library-STPLIB is a depository of test instances of the Space Transportation Problem. The depository of instances can be downloaded for others researchers for experimentation. The first set contained in the library consider 24 instances of Commercial Space of G-FORCE ONE (weightlessness). Weightlessness is achieved by doing aerobatic maneuvers known as parabolas and the passengers experience true weightlessness. G-FORCE ONE flies level to the horizon at an altitude of 24,000 feet, and the it pull up gradually increasing 45° to the horizon reaching an altitude of 34,000 feet. During this pull-up, passengers will feel the pull of 1.8 Gs. Next the plane is “pushed over” to create the zero gravity segment of the parabola. For the next 20-30 seconds everything in the plane is weightless. Next a gentle pull-out is started which allows the flyers to stabilize on the aircraft floor. This maneuver is repeated 12-15 times, each taking about ten miles of airspace to perform. The Space Transportation Problem Library could be used in the future for researchers to optimize the cost of transportation of passengers.
Project Information
License: Creative Commons BY 3.0Source Code/Project URL: https://github.com/vanoye/Aerospace-Transport-Problem.git