Display Prospects on Vertical Landing

2006 ◽  
Author(s):  
Tatsuo Minohara
Keyword(s):  
Vertical Landing

scholarly journals Triangular Phase Shift Detector for Drone Precise Vertical Landing RF Systems

2021 ◽  
Vol 70 ◽  
pp. 1-8
Author(s):  
Victor Arana-Pulido ◽  
Eugenio Jimenez-Yguacel ◽  
Francisco Cabrera-Almeida ◽  
Pedro Quintana-Morales
Keyword(s):  
Phase Shift ◽  
Rf Systems ◽  
Vertical Landing

The Landing Gear of the SC.l Aircraft

1960 ◽  
Vol 64 (590) ◽  
pp. 81-86
Author(s):  
H. G. Conway
Keyword(s):  
Delta Wing ◽  
Landing Gear ◽  
Unusual Feature ◽  
Centre Of Gravity ◽  
Vertical Landing

The Short SC.l is a small delta wing V.T.O. aircraft of about 7,800 lb. all-up weight. Its unusual feature is that it is provided with vertical thrusting engines to enable it to take-off and land vertically and to hover. It can also operate normally as a conventional aircraft.The nature of the aircraft introduces a number of problems in the design of the landing gear. The first of these is that all wheels must be fully castoring since a vertical landing may take place with a certain amount of drift in any direction. Another complication arises because of the possibility of landing with slight backward drift, it being necessary to move the main wheels aft when the pilot intends to make a vertical landing; if the wheels were left in the required rearward position for conventional take-off the elevator power would be inadequate to lift the nose of the aircraft. The landing gear is therefore provided with simple means for moving the wheels fore and aft by a small amount, to move the position of the main wheels in relation to the centre of gravity.

Design and dynamic analysis of landing gear system in vertical takeoff and vertical landing reusable launch vehicle

2018 ◽  
Vol 233 (10) ◽  
pp. 3700-3713
Author(s):  
Ming Zhang ◽  
Dafu Xu ◽  
Shuai Yue ◽  
Haifeng Tao
Keyword(s):  
General Scheme ◽  
Surface Friction ◽  
Launch Vehicle ◽  
Landing Gear ◽  
Gear System ◽  
Extreme Condition ◽  
Response Characteristics ◽  
Reusable Launch Vehicle ◽  
Vertical Landing ◽  
Vertical Takeoff

Landing gear system is a key part of the implementation of reusable vertical takeoff and vertical landing launch vehicle, where its buffing performance is directly related to the vehicle whether it can land safely or stably. According to the reusable launch vehicle general scheme, outrigger landing legs are designed, and the hydraulic absorber is used for the landing gear system. Meanwhile, a scaling principle prototype of landing gear system is developed, and the landing impact test is carried out. A dynamic simulation model of the landing vehicle has been set up, researching the influence of parameters, such as the horizontal velocity, initial inclination, surface friction coefficient, and pitch angular velocity on the landing performance. Four kinds of extreme conditions are identified, and dynamic response characteristics of landing system under each extreme condition are conducted. The simulation results are in good agreement with the experimental data. The buffing performance of the vehicle meets the design requirements, which provides a reference for the design of landing gear system of the vehicle.

scholarly journals Feedback Local Optimality Principle Applied to Rocket Vertical Landing (VTVL)

2020 ◽  
pp. 227-235
Author(s):  
Dario Antonelli ◽  
Gianluca Pepe ◽  
Leandro Nesi ◽  
Antonio Carcaterra
Keyword(s):  
Local Optimality ◽  
Optimality Principle ◽  
Vertical Landing

Analysis of Parameters Affecting Impact Force Attenuation during Landing in Human Vertical Free Fall

1982 ◽  
Vol 11 (3) ◽  
pp. 141-147 ◽  
Author(s):  
J Mizrahi ◽  
Z Susak
Keyword(s):  
Early Phase ◽  
Impact Force ◽  
Body Position ◽  
Free Fall ◽  
Muscle Action ◽  
Impact Forces ◽  
Ground Roll ◽  
Vertical Landing

The characteristics of impact forces on the legs during vertical landing of human vertical free fall in different falling conditions were studied to reveal the parameters which take part in the attenuation of these impact forces. The following parameters were investigated: body position during landing, range of flexion of the joints of the legs at impact, usage of ground-roll immediately after impact and softness of the ground. The results indicate that joint movements and muscle action play a major role in reducing peak forces during landing. This emphasizes the importance of adequate training to improve the pre-programmed non-reflex muscle action, necessary in the early phase of impact.

Autonomous vertical landing on an oscillating platform: an internal-model based approach

Automatica ◽  
2002 ◽  
Vol 38 (1) ◽  
pp. 21-32 ◽  
Author(s):  
L. Marconi ◽  
A. Isidori ◽  
A. Serrani
Keyword(s):  
Internal Model ◽  
Model Based ◽  
Vertical Landing
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