| タイトル | Flight test of a VTOL digital autoland system along complex trajectories |
| 著者（英） | Downing, D. R.; Ostroff, A. J.; Bryant, W. H. |
| 著者所属（英） | NASA Langley Research Center |
| 発行日 | 1979-01-01 |
| 言語 | eng |
| 内容記述 | The objective of this research is the development and flight test of a digital multi-rate VTOL autoland system. This autoland system provided the NASA/Army Fly-by-Wire CH-47 helicopter with an automatic 4-D trajectory following and landing capability. Flight tests were conducted along complex trajectories with descending, turning, and decelerating segments. The flight software consists of a trajectory generator and guidance algorithm operating at two iterations per second and a set of sensor filters and an advanced controller operating at 10 iterations per second. This low iteration rate digital controller has a proportional-integral structure that provides an autotrim function. The control gains, scheduled as a function of flight condition, are updated every two seconds. All flight software, except input/output routines, are coded in FORTRAN using floating point arithmetic and are exercised in a ROLM 1664 flight computer. The flight software, the ground and flight hardware, the autoland system's position tracking performance, and the controller's velocity and heading tracking performance are presented. |
| NASA分類 | AIRCRAFT COMMUNICATIONS AND NAVIGATION |
| レポートNO | 79A45358
AIAA PAPER 79-1703 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/426057 |
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