PSO Optimized Active Disturbance Rejection Control for Aircraft Anti-Skid Braking System by Fengrui Xu, Mengqiao Chen, Xuelin Liang, Wensheng Liu

“…A high-quality and secure touchdown run for an aircraft is essential for economic, operational, and strategic reasons. …”
Get full text

Study of impact and transient vibration of aircraft landing gear by Hong, Weiling.

“…Results showed that height and weight during touchdown affect landing gear performance. Working in accordance to Joint Aviation Requirements (JAR) regulations, the increase in number of throttle valves connected in series circuit would improve the damping effect. …”
Get full text

Some measures of aircraft performance on the airport surface by Swedish, William J.

Get full text

Probe mark bondability study for B6HFC wafer technology - in relation to die pad damage and exposed oxide by Loh, Chee Ping.

“…This dissertation covers the experimental analysis of probe mark bondability fo BiCMOS wafer where the bond pads of size 100 micrometer by 100 micrometer were subjected to a matrix of touchdown and overdrive settings at ambient temperature during the wafer probing process.…”
Get full text

Mediation of lubricated air films using spatially periodic dielectrophoretic effect by Quoc Vo, Tuan Tran

“…Vo and Tran show how to vent the drop on short notice for a smooth touchdown, harnessing dielectrophoretic forces to create dynamic drainage channels.…”
Get full text

Optimization of Airplane Landing in Crosswind Conditions for Minimum Tire Wear by Stefano Cacciola, Carlo E. D. Riboldi, Edoardo Generali

“…A notable concern associated with touchdown events, especially when crosswind is present, is tire wear. …”
Get full text

Precise automated landing of a fixed-wing aircraft onto a moving platform by Parker Mohamed Zahier, Engelbrecht Jacobus Adriaan Albertus

“…A prediction algorithm calculates the touchdown point between the aircraft and the moving platform. …”
Get full text

Development of Vertiport Capacity Envelopes and Analysis of Their Sensitivity to Topological and Operational Factors by Vascik, Parker D., Hansman, R. John

“…The approach is used to determine the sensitivity of vertiport capacity to the number and layout of touchdown and liftoff pads, taxiways, gates, and parking pads (i.e. the vertiport topology). …”
Get full text

Human-automation task allocation in lunar landing: simulation and experiments by Wen, Hui Ying

Get full text

The characteristic and size–frequency distribution of rocks at the Zhurong landing site, Mars by Xiukuo Sun, Shouding Li, Shouding Li, Juan Li, Juan Li, Yanfang Wu, Yanfang Wu, Shuo Zhang, Bo Zheng, Bo Zheng, Zhaobin Zhang, Zhaobin Zhang, Tao Xu, Tao Xu, Xinshuo Chen, Xinshuo Chen, Yiming Diao, Yiming Diao

“…Tianwen-1, China’s first autonomous Mars exploration mission, formed an excavated depression during touchdown, which has been the deepest depression on the Martian surface so far compared with others. …”
Get full text

Semi-Active Control for a Helicopter with Multiple Landing Gears Equipped with Magnetorheological Dampers by Quoc Viet Luong, Dae-Sung Jang, Jai-Hyuk Hwang

“…Typically, a helicopter landing gear system with skids or passive wheel-dampers is designed based on only one critical touchdown condition. Thus, this helicopter landing gear system may not perform well in different landing conditions. …”
Get full text

Helicopter Landing Trajectory Optimization after Tail Rotor Control Failure in Different Collective Pitch

“…A normal landing maneuver will cause a high yaw rate at touchdown, which is dangerous. Therefore, autorotation is preferred during touchdown because the landing is more secure with small yaw rate. …”
Get full text

Systematization and classification of office space by D. Avramenko

“…It involves the absence of isolation and the general organization of work, is divided into two types of co-anchoring (including an open plan office) and touchdown office (divided into square-planimetric, different-ladder and arbitrary-non-euclidean subtype). …”
Get full text

Establishment of a HEK293T cell line able to site-specifically integrate and stably express GDNF by rAAV-2 vector by Jinju Zhang, Yun Zhang, Xiaomei Liu, Jingjing Xiang, Chun Zhang

“…Additionally, the infected HEK293T cells were separately validated by touchdown polymerase chain reaction (PCR) and Western-blot. …”
Get full text

A Simulation Study on Risks to Wind Turbine Arrays from Thunderstorm Downbursts in Different Atmospheric Stability Conditions by Nan-You Lu, Lance Manuel, Patrick Hawbecker, Sukanta Basu

“…The results of our calculations show the highest simulated foreaft tower bending moment to be 85.4 MN-m, which occurs at a unit sited in the array farther from touchdown center of the downburst initiated in a stable boundary layer.…”
Get full text

Mechanical Advantages and Disadvantages of a Lower Limb Using Forefoot to Heel Strike Landing by Takayuki Koike, Norimasa Yamada

“…Negative work in the first half of the stance phase and positive work in the second half of the stance phase at all three joints were smaller in HG than in LG. The touchdown angle was larger and angular displacements at the joints were smaller in HG than in LG. …”
Get full text

Strategies of elite Chinese gymnasts in coping with landing impact from backward somersault by Chengliang Wu, Weiya Hao, Qichang Mei, Xiaofei Xiao, Xuhong Li, Wei Sun

“…The results showed that the international-level gymnasts first extended their lower extremity joints, then flexed just before touchdown. They continued flexing actively and rapidly in the initial impact phase and then extended to resist the landing impact and maintain body posture during the terminal impact phase of the landing. …”
Get full text

Development of Vertiport Capacity Envelopes and Analysis of Their Sensitivity to Topological and Operational Factors by Vascik, Parker D., Hansman, John

“…The approach is used to determine the sensitivity of vertiport capacity to the number and layout of touchdown and liftoff pads, taxiways, gates, and parking pads (i.e. the vertiport topology). …”
Get full text

Temporal evolution of crack propagation characteristics in a weak snowpack layer: conditions of crack arrest and sustained propagation by B. Bergfeld, A. van Herwijnen, G. Bobillier, P. L. Rosendahl, P. Weißgraeber, V. Adam, V. Adam, J. Dual, J. Schweizer

“…Crack speeds were highest for experiments resulting in full propagation, and crack arrest lengths were always shorter than touchdown lengths. Based on these findings, an index for self-sustained crack propagation is proposed. …”
Get full text

SIMULAND - A CODE TO ANALYZE DYNAMIC EFFECTS DURING LANDING by Marcel STERE, Daniela BARAN, Nicolae APOSTOLESCU

“…SIMULAND-01 is a program intended to analyze a reduced model (4-30 DoF) of the aircraft under transient dynamic loads during the landing phase (touchdown).…”
Get full text