by National Aeronautics and Space Administration, Langley Research Center in Hampton, Va .
Written in English
|Statement||Frederick J. Lallman|
|Series||NASA technical memorandum -- 85799|
|Contributions||Langley Research Center|
|The Physical Object|
The control of the satellite's motion is performed by applying a restricted tension force along the connecting tether. The goal of the control is to steer the satellite from a periodic state close to the local vertical position to a periodic motion farther away from the space station in shortest by: 9. For a breaking cable we find that the speed of snapback, which can have potentially catastrophic effects, is proportional to the initial strain level, but the principal parameter controlling the cable behaviour is the time it takes for the cable to fracture. In the case of a tethered buoy in waves, we find that beyond a threshold wave amplitude Cited by: The space tether experiment, a joint venture of the US and Italy, called for a scientific payload--a large, spherical satellite--to be deployed from the US space shuttle at the end of a conducting cable (tether) 20 km ( miles) long. The idea was to let the shuttle drag the tether across the Earth's magnetic field, producing one part of a. The tether cable of the scaled model used in the experiment was a mm diameter copper wire with a purity of %. Both ends of the tether cable were fixed with top and bottom fixed jigs, as shown in Fig. 6. A load cell was attached to measure the initial tension of the tether cable .
Highlights Multi-tethered formation is an emerging technology for future space missions. Open hub-and-spoke formations can be modeled by means of massless tethers. In closed formations centrifugal pull on outer tethers makes inner ones loose tension. This effect can be represented only by means of a massive tether model. The use of circular external tethers is suggested as a means for . A tether satellite is a satellite connected to another by a space tether. A number of satellites have been launched to test tether technologies, with varying degrees of success. Types. There are many different (and overlapping) types of tether. As shown in figure 5, the tether reel system consists of a tether reel and a reel motor [SR (): Minimotor SA] connected through a torque transmission device [permanent wave torque EC: Koshin Seikosho Co. Ltd.], which transmits a constant torque from the reel motor to the tether reel, then the tether is in a controlled tension state. American Institute of Aeronautics and Astronautics Sunrise Valley Drive, Suite Reston, VA
TetherPro cables and adapters are used by the best in the industry, and Tether Tools is committed to providing the fastest and most reliable transfers to keep your tethered . Cable diameter is often cm with 7 pipes, with each pipe composed of several sections. The top of each tension leg has alternating load support and an upper flexible device connected with the platform, thus making the tension leg able to do oblique movements and bear lateral loads. c. Column. The dynamics of a space tether system composed of one active spacecraft, an uncontrolled large debris (e.g., a defunct satellite), and a visco-elastic tether connecting the two bodies are. RETE (Research on Electrodynamic Tether Effects): This investigation provides a profile of the electrical potential in the plasma sheath and identifies waves excited by this potential in the region around the satellite. The instruments are mounted in two canisters at the end of a pair of m extendible booms.