Log in

Relevant bibliographies by topics / Landing phase / Journal articles

To see the other types of publications on this topic, follow the link: Landing phase.

Journal articles on the topic 'Landing phase'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Landing phase.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Koh, Timothy J., and James G. Hay. "Landing Leg Motion and Performance in the Horizontal Jumps II: The Triple Jump." International Journal of Sport Biomechanics 6, no. 4 (1990): 361–73. http://dx.doi.org/10.1123/ijsb.6.4.361.

Full text

Abstract:

The motions of the landing leg preceding the support phases of the hop, step, and jump, thought to be important in the triple jump, are described. Film analysis of 16 elite male triple jumpers competing in the 1986 and 1987 TAC (U.S. national) Championships showed that backward sweeping, or “active,” landings were used prior to each support phase. A mathematical model showed that muscle action reduced the forward horizontal velocity of the landing foot during each landing. There were no statistically significant correlations of measures of landing leg motion with measures of performance. The l

APA, Harvard, Vancouver, ISO, and other styles

2

Weinhandl, Joshua T., Mukta Joshi, and Kristian M. O’Connor. "Gender Comparisons between Unilateral and Bilateral Landings." Journal of Applied Biomechanics 26, no. 4 (2010): 444–53. http://dx.doi.org/10.1123/jab.26.4.444.

Full text

Abstract:

The increased number of women participating in sports has led to a higher knee injury rate in women compared with men. Among these injuries, those occurring to the ACL are commonly observed during landing maneuvers. The purpose of this study was to determine gender differences in landing strategies during unilateral and bilateral landings. Sixteen male and 17 female recreational athletes were recruited to perform unilateral and bilateral landings from a raised platform, scaled to match their individual jumping abilities. Three-dimensional kinematics and kinetics of the dominant leg were calcul

APA, Harvard, Vancouver, ISO, and other styles

3

Liu, Yinfu, Ruishan Sun, and Peng He. "Research on the Pre-Warning Method of Aircraft Long Landing Based on the XGboost Algorithm and Operation Characteristics Clustering." Aerospace 10, no. 5 (2023): 409. http://dx.doi.org/10.3390/aerospace10050409.

Full text

Abstract:

Long landing hazardous events (long landings) are regarded as the most common unsafe events during an aircraft’s landing phase and are significantly influenced by pilots’ leveling operations. This paper proposes a pre-warning method for long aircraft landings based on operation characteristics clustering to better prevent the occurrence of long landing events and develop pre-warning technology for long aircraft landings applicable to actual civil aviation aircraft operations. Based on the quick access recorder (QAR) flight data of a Boeing B737-800 fleet, the Gaussian mixture model (GMM) clust

APA, Harvard, Vancouver, ISO, and other styles

4

Kamffer, Lenthea, Henriette V. Hammill, Yolandi Willemse, and Mark Kramer. "Multidirectional Landing Kinetics, Stabilisation Times, and Associated Isokinetic Knee Torques of High-Level Female Netball Players." Applied Sciences 13, no. 3 (2023): 1261. http://dx.doi.org/10.3390/app13031261.

Full text

Abstract:

Netball is a multidirectional sport afflicted by a relatively high proportion of lower-extremity injuries. The purpose of this study was to evaluate the relationships between multidirectional landing stabilisation times, unilateral landing kinetics, and isokinetic knee joint torques in elite female netball players. A total of 15 players volunteered for the study (age: 20.80 ± 1.42 years; height: 1.75 ± 0.06 m; body mass: 71.69 ± 13.58 kg). All players completed a minimum of 25 multidirectional, unilateral landing tasks, as well as isokinetic dynamometry, to evaluate both concentric and eccentr

APA, Harvard, Vancouver, ISO, and other styles

5

Li, Yumeng, He Wang, and Kathy J. Simpson. "Chronic Ankle Instability Does Not Influence Tibiofemoral Contact Forces During Drop Landings Using a Musculoskeletal Model." Journal of Applied Biomechanics 35, no. 6 (2019): 426–30. http://dx.doi.org/10.1123/jab.2018-0436.

Full text

Abstract:

The purpose of the study was to compare the tibiofemoral contact forces of participants with chronic ankle instability versus controls during landings using a computer-simulated musculoskeletal model. A total of 21 female participants with chronic ankle instability and 21 pair-matched controls performed a drop landing task on a tilted force plate. A 7-camera motion capture system and 2 force plates were used to test participants’ lower-extremity biomechanics. A musculoskeletal model was used to calculate the tibiofemoral contact forces (femur on tibia). No significant between-group differences

APA, Harvard, Vancouver, ISO, and other styles

6

Xu, Datao, Xuanzhen Cen, Meizi Wang, et al. "Temporal Kinematic Differences between Forward and Backward Jump-Landing." International Journal of Environmental Research and Public Health 17, no. 18 (2020): 6669. http://dx.doi.org/10.3390/ijerph17186669.

Full text

Abstract:

Backward jump-landing during sports performance will result in dynamic postural instability with a greater risk of injury, and most research studies have focused on forward landing. Differences in kinematic temporal characteristics between single-leg and double-leg backward jump-landing are seldom researched and understood. The purpose of this study was to compare and analyze lower extremity kinematic differences throughout the landing phases of forward and backward jumping using single-leg and double-leg landings (FS and BS, FD and BD). Kinematic data were collected during the landing phases

APA, Harvard, Vancouver, ISO, and other styles

7

Ali, Afrah A., Nizar H. Abbas, and Ahmed Hameed Kaleel. "Automatic Aircraft Landing System: A Review." Journal of Engineering 30, no. 9 (2024): 165–89. http://dx.doi.org/10.31026/j.eng.2024.09.09.

Full text

Abstract:

The aircraft landing phase, marking the finishing of a flight plane, is a critical yet dangerous aerial maneuver. Even though it might seem simple, predicting the complexities of performance during landing presents a big challenge due to the dynamic characteristics of the phase, interaction with piloting methods, as well as inherent uncertainties in aerodynamics. Landing is executed in close proximity to the ground at reduced airspeed, the landing phase entails an escalated safety risk. Notably, incidents and accidents, particularly overruns where aircraft fail to slow sufficiently on the runw

APA, Harvard, Vancouver, ISO, and other styles

8

Duan, Lian, Yuan Gao, Feng Gao, Yang Sun, and Naiyuan Tian. "Analysis of the impact of different landing heights and lateralities on lower limb joint load based on statistical parametric mapping." PLOS One 20, no. 5 (2025): e0324656. https://doi.org/10.1371/journal.pone.0324656.

Full text

Abstract:

This study aimed to investigate the effects of landing height and limb laterality on lower limb joint loading using Statistical Parametric Mapping (SPM), thereby providing insights for injury prevention and optimizing performance in dynamic sports. Twenty male participants were assessed using the Qualisys 3D motion capture system and Kistler 3D force plates during landings from 30 cm and 45 cm on both dominant and non-dominant legs. No significant interaction effects between landing side and height were observed, but landing on the non-dominant leg increased the ankle joint internal rotation m

APA, Harvard, Vancouver, ISO, and other styles

9

Li, Yumeng, He Wang, and Kathy J. Simpson. "Chronic Ankle Instability Does Not Influence Tibiofemoral Contact Forces during Drop Landings." Proceedings 49, no. 1 (2020): 5. http://dx.doi.org/10.3390/proceedings2020049005.

Full text

Abstract:

Chronic ankle instability (CAI) is a very common sequela after ankle sprains. Previous studies observed some knee biomechanical and neuromuscular alterations of CAI that could potentially relate to the knee injury mechanism during landings. However, to our knowledge, no studies have assessed the tibiofemoral contact forces for individuals with CAI. The purpose of the study was to compare the tibiofemoral contact forces of participants with CAI versus controls during landings using a computer-simulated musculoskeletal model. Twenty-one female participants with CAI and 21 pair-matched controls p

APA, Harvard, Vancouver, ISO, and other styles

10

McNitt-Gray, Jill L., Takashi Yokoi, and Carl Millward. "Landing Strategies Used by Gymnasts on Different Surfaces." Journal of Applied Biomechanics 10, no. 3 (1994): 237–52. http://dx.doi.org/10.1123/jab.10.3.237.

Full text

Abstract:

In this study, landing strategies of gymnasts were hypothesized to change with different landing surfaces. This hypothesis was tested by comparing the kinematics and reaction force-time characteristics of two-foot competition-style drop landings performed by male and female collegiate gymnasts onto three surfaces (soft mat, stiff mat, no mat). Significantly lower peak vertical forces, longer landing phase times, and greater knee and hip flexion were observed between the no mat condition and the mat conditions. Knee flexion and peak knee flexion velocities were also observed to be significantly

APA, Harvard, Vancouver, ISO, and other styles

11

Koh, Timothy J., and James G. Hay. "Landing Leg Motion and Performance in the Horizontal Jumps I: The Long Jump." International Journal of Sport Biomechanics 6, no. 4 (1990): 343–60. http://dx.doi.org/10.1123/ijsb.6.4.343.

Full text

Abstract:

The motions of the landing leg in the final three strides of the approach in the long jump are described, as are the relationships of these landing leg motions with performance. Film analysis of 19 elite male long jumpers competing in the 1986 and 1987 TAG (U.S. national) Championships showed that backward sweeping, or “active,” landings were used in each stride considered. However, the landing in the last stride was less active than those in the two preceding strides. A mathematical model showed that muscle action reduced the forward horizontal velocity of the landing foot in each landing. Th

APA, Harvard, Vancouver, ISO, and other styles

12

Begalle, Rebecca L., Meghan C. Walsh, Melanie L. McGrath, Michelle C. Boling, J. Troy Blackburn, and Darin A. Padua. "Ankle Dorsiflexion Displacement During Landing is Associated With Initial Contact Kinematics but not Joint Displacement." Journal of Applied Biomechanics 31, no. 4 (2015): 205–10. http://dx.doi.org/10.1123/jab.2013-0233.

Full text

Abstract:

The ankle, knee, and hip joints work together in the sagittal plane to absorb landing forces. Reduced sagittal plane motion at the ankle may alter landing strategies at the knee and hip, potentially increasing injury risk; however, no studies have examined the kinematic relationships between the joints during jump landings. Healthy adults (N = 30; 15 male, 15 female) performed jump landings onto a force plate while three-dimensional kinematic data were collected. Joint displacement values were calculated during the loading phase as the difference between peak and initial contact angles. No rel

APA, Harvard, Vancouver, ISO, and other styles

13

Chinnasee, Chamnan, Gillian Weir, Siriporn Sasimontonkul, Jacqueline Alderson, and Cyril Donnelly. "A Biomechanical Comparison of Single-Leg Landing and Unplanned Sidestepping." International Journal of Sports Medicine 39, no. 08 (2018): 636–45. http://dx.doi.org/10.1055/a-0592-7422.

Full text

Abstract:

AbstractUnplanned sidestepping and single-leg landing have both been used to screen athletes for injury risk in sport. The aim of this study was to directly compare the lower limb mechanics of three single-leg landing tasks and an unplanned sidestepping task. Thirteen elite female team sport athletes completed a series of non-contact single-leg drop landings, single-leg countermovement jumps, single-leg jump landings and unplanned sidestepping in a randomized counterbalanced design. Three dimensional kinematics (250 Hz) and ground reaction force (2,000 Hz) data with a participant specific lowe

APA, Harvard, Vancouver, ISO, and other styles

14

McNitt-Gray, Jill L., Takashi Yokoi, and Carl Millward. "Landing Strategy Adjustments Made by Female Gymnasts in Response to Drop Height and Mat Composition." Journal of Applied Biomechanics 9, no. 3 (1993): 173–90. http://dx.doi.org/10.1123/jab.9.3.173.

Full text

Abstract:

In this study, drop height and landing mat composition were hypothesized to influence the landing strategies preferred by female gymnasts. Adjustments in strategy in response to changes in drop height and mat composition were identified by comparison of mechanical variables characterizing two-foot competition-style drop landings from three heights onto two different mats varying in composition (i.e., soft vs. stiff). Force-time characteristics of the landings were quantified (1000 Hz) by a force plate fully supporting the mat. Segment kinematics were recorded simultaneously with shuttered vide

APA, Harvard, Vancouver, ISO, and other styles

15

Wu, Chengliang, Weiya Hao, Qichang Mei, Xiaofei Xiao, Xuhong Li, and Wei Sun. "Strategies of elite Chinese gymnasts in coping with landing impact from backward somersault." PeerJ 7 (October 25, 2019): e7914. http://dx.doi.org/10.7717/peerj.7914.

Full text

Abstract:

This study aimed to investigate how elite Chinese gymnasts manage the landing impact from a backward somersault. Six international-level male gymnasts performed backward somersault tests with a synchronous collection of kinematics (250 Hz), ground reaction forces (1,000 Hz), and surface electromyography (EMG) (2,000 Hz). A 19-segment human model was developed and lower extremity joints torques were calculated by means of a computer simulation. The angles of the lower extremity joints initially extended and then flexed. These angular velocities of extension continued to decrease and the joint t

APA, Harvard, Vancouver, ISO, and other styles

16

Liu, Mao Han, Chun Tao Li, and Yi Wang. "UAV Automatic Landing Control Law." Advanced Materials Research 383-390 (November 2011): 1452–57. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.1452.

Full text

Abstract:

Landing is the most important stage of the Flight of UAV, the study of automatic landing of UAVs has important engineering significance. In this paper, the UAV landing trajectory is divided into approach phase, steep glide phase and flare phase; a cascade control structure controller of height tracking was applied and the landing control law was designed. The digital simulation was done in the MATLAB / simulink environment. The results of simulation indicated that UAV can track the designed landing trajectory very well under the control law of automatic landing and safe landing can be achieved

APA, Harvard, Vancouver, ISO, and other styles

17

Jarvis, Danielle N., and Kornelia Kulig. "Lower Extremity Biomechanical Demands During Saut de Chat Leaps." Medical Problems of Performing Artists 31, no. 4 (2016): 211–17. http://dx.doi.org/10.21091/mppa.2016.4039.

Full text

Abstract:

In dance, high demands are placed on the lower extremity joints during jumping tasks. The purpose of this study was to compare biomechanical demands placed on the lower extremity joints during the takeoff and landing phases of saut de chat leaps. METHODS: Thirty healthy, experienced dancers with 20.8±4.9 yrs of dance training performed 5 saut de chat leaps. A three-dimensional motion analysis system and force plates were used to collect kinematic and kinetic data. Ground reaction force (GRF) peaks and impulse and sagittal plane kinematics and kinetics of the hip, knee, ankle, and metatarsophal

APA, Harvard, Vancouver, ISO, and other styles

18

Gallego-Pérez, Anabel, Elisa Benito-Martínez, and Beatriz Alonso-Cortés Fradejas. "Normative Muscle Activation Patterns During One and Five Countermovement Jumps." Bioengineering 12, no. 7 (2025): 767. https://doi.org/10.3390/bioengineering12070767.

Full text

Abstract:

Studying normative values for muscle activation in the vastus lateralis (VL), vastus medialis (VM), and biceps femoris (BF), as well as the hamstrings/quadriceps (H:Q) ratio during the Countermovement Jump (CMJ). Determine whether there were differences between the CMJ and the trial of 5 consecutive CMJs (5 CMJ) and between the take-off and landing phases. A cross-sectional descriptive study. Thirty-one participants (20 females and 11 males, 22.52 ± 3.295 years, BMI 24.32, weight 58.23 ± 4.32 Surface electromyography has been used to determine muscle activation during the CMJ and 5 CMJ. Muscle

APA, Harvard, Vancouver, ISO, and other styles

19

Kulas, Anthony S., Randy J. Schmitz, Sandra J. Shultz, Mary Allen Watson, and David H. Perrin. "Energy Absorption as a Predictor of Leg Impedance in Highly Trained Females." Journal of Applied Biomechanics 22, no. 3 (2006): 177–85. http://dx.doi.org/10.1123/jab.22.3.177.

Full text

Abstract:

Although leg spring stiffness represents active muscular recruitment of the lower extremity during dynamic tasks such as hopping and running, the joint-specific characteristics comprising the damping portion of this measure, leg impedance, are uncertain. The purpose of this investigation was to assess the relationship between leg impedance and energy absorption at the ankle, knee, and hip during early (impact) and late (stabilization) phases of landing. Twenty highly trained female dancers (age = 20.3 ± 1.4 years, height = 163.7 ± 6.0 cm, mass = 62.1 ± 8.1 kg) were instrumented for biomechanic

APA, Harvard, Vancouver, ISO, and other styles

20

Petrishchev, V. F. "Energy-Saving Algorithm of Automatic Control of Compulsory Passenger Carrier Landing. Part 1." Mekhatronika, Avtomatizatsiya, Upravlenie 19, no. 11 (2018): 725–33. http://dx.doi.org/10.17587/mau.19.725-733.

Full text

Abstract:

The task was to develop an automatic landing system (ALS) for a passenger carrier that can be externally activated and excludes the possibility of the crew’s interference into the landing process, for example, when a carrier alters its nominal course or there is no contact with the crew. The air crush history saw a lot of cases that could have been prevented if the planes had had an ALS system and airports had had possibilities to activate that system and suspend the crew from flight control. One of such unforgettable examples is the New-York tragedy of September 11, 2001. State-of-the-art tec

APA, Harvard, Vancouver, ISO, and other styles

21

Petrishchev, V. F. "Energy-Saving Algorithm of Automatic Control of Compulsory Passenger Carrier Landing. Part II." Mekhatronika, Avtomatizatsiya, Upravlenie 19, no. 12 (2018): 788–96. http://dx.doi.org/10.17587/mau.19.788-796.

Full text

Abstract:

The task was to develop an automatic landing system (ALS) for a passenger carrier that can be externally activated and excludes the possibility of the crew’s interference into the landing process, for example, when a carrier alters its nominal course or there is no contact with the crew. The air crush history saw a lot of cases that could have been prevented if the planes had had an ALS system and airports had had possibilities to activate that system and suspend the crew from flight control. One of such unforgettable examples is the New-York tragedy of September 11, 2001. State-of-the-art tec

APA, Harvard, Vancouver, ISO, and other styles

22

Nakatsuka, Yusuke, Satoshi Satoh, and Katsuhiko Yamada. "Landing Guidance Control Combining Powered Descending with Nonlinear Optimization and Vertical Descending with Model Prediction." Journal of Robotics and Mechatronics 36, no. 5 (2024): 1110–21. http://dx.doi.org/10.20965/jrm.2024.p1110.

Full text

Abstract:

In this study, we propose a landing guidance control method for the Moon using two control methods. The landing of a spacecraft on the Moon is divided into two phases: the powered descending phase and the vertical descending phase. The powered descending phase aims to optimize the entire trajectory to satisfy the termination constraint, instead of allowing for a relatively long control period. This phase performs feedback control using trajectory updates via nonlinear optimization. The vertical-descending phase aims to achieve accurate control over a short control period. This phase applies no

APA, Harvard, Vancouver, ISO, and other styles

23

Ma, Ning, Xiangrui Weng, Yunfeng Cao, and Linbin Wu. "Monocular-Vision-Based Precise Runway Detection Applied to State Estimation for Carrier-Based UAV Landing." Sensors 22, no. 21 (2022): 8385. http://dx.doi.org/10.3390/s22218385.

Full text

Abstract:

Improving the level of autonomy during the landing phase helps promote the full-envelope autonomous flight capability of unmanned aerial vehicles (UAVs). Aiming at the identification of potential landing sites, an end-to-end state estimation method for the autonomous landing of carrier-based UAVs based on monocular vision is proposed in this paper, which allows them to discover landing sites in flight by using equipped optical sensors and avoid a crash or damage during normal and emergency landings. This scheme aims to solve two problems: the requirement of accuracy for runway detection and th

APA, Harvard, Vancouver, ISO, and other styles

24

Pilanthananond, Metaneeya, Kittichai Tharawadeepimuk, Vitoon Saengsirisuwan, and Weerawat Limroongreungrat. "Muscle Activation and Ground Reaction Force between Single-Leg Drop Landing and Jump Landing among Young Females during Weight-Acceptance Phase." Sports 11, no. 9 (2023): 185. http://dx.doi.org/10.3390/sports11090185.

Full text

Abstract:

Single-leg drop landing (SLDL) and jump landing (SLJL) are frequently used as assessment tools for identifying potential high-risk movement patterns; thus, understanding differences in neuromuscular responses between these types of landings is essential. This study aimed to compare lower extremity neuromuscular responses between the SLDL and SLJL. Thirteen female participants performed an SLDL and SLJL from a 30-cm box height. Vertical ground reaction force (vGRF), time to peak vGRF, and surface electromyography (sEMG) data were collected. Continuous neuromuscular responses, peak vGRF, and tim

APA, Harvard, Vancouver, ISO, and other styles

25

Niespodziński, Bartłomiej, Rafał Grad, Andrzej Kochanowicz, et al. "The Neuromuscular Characteristics of Gymnasts’ Jumps and Landings at Particular Stages of Sports Training." Journal of Human Kinetics 78, no. 1 (2021): 15–28. http://dx.doi.org/10.2478/hukin-2021-0027.

Full text

Abstract:

Abstract Safe and proper landings are crucial elements of gymnastics events. Long-term training leads to specific neuromuscular adaptations which are yet to be explored in terms of gymnastic landings. The aim of the study was to assess differences in landings’ neuromuscular characteristics between gymnasts at three subsequent gymnastic training stages and age-matched non-athletes. Forty-six gymnasts (G) and 58 controls (C) performed countermovement jumps on a force plate with simultaneous surface electromyography (SEMG) of lower body muscles, measured during the pre-(100 ms) and post-landing p

APA, Harvard, Vancouver, ISO, and other styles

26

Cho, Dong-Hyun, Donghoon Kim, and Henzeh Leeghim. "Optimal Lunar Landing Trajectory Design for Hybrid Engine." Mathematical Problems in Engineering 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/462072.

Full text

Abstract:

The lunar landing stage is usually divided into two parts: deorbit burn and powered descent phases. The optimal lunar landing problem is likely to be transformed to the trajectory design problem on the powered descent phase by using continuous thrusters. The optimal lunar landing trajectories in general have variety in shape, and the lunar lander frequently increases its altitude at the initial time to obtain enough time to reduce the horizontal velocity. Due to the increment in the altitude, the lunar lander requires more fuel for lunar landing missions. In this work, a hybrid engine for the

APA, Harvard, Vancouver, ISO, and other styles

27

Romanchuk, Nicholas J., Michael J. Del Bel, and Daniel L. Benoit. "SEX-SPECIFIC ENERGY ABSORPTION STRATEGIES DURING UNANTICIPATED SINGLE-LEG LANDINGS IN ADOLESCENTS: IMPLICATIONS FOR KNEE INJURIES." Orthopaedic Journal of Sports Medicine 8, no. 4_suppl3 (2020): 2325967120S0023. http://dx.doi.org/10.1177/2325967120s00237.

Full text

Abstract:

Background: The vast majority of ACL injuries in adolescents occur during non-contact injuries, in particular single-leg landings. The magnitude of energy absorption about each joint during theses landings influences the internal and external forces acting on the joints of the lower extremity. Understanding the biomechanics of landing in adolescent male and female athletes may provide insight into these non-contact injury mechanisms. Hypothesis/Purpose: This study set out to identify sex-specific energy absorption strategies during single-leg landing and determine the relationship between join

APA, Harvard, Vancouver, ISO, and other styles

28

Chen, Mingxiao. "Research on optimization of basketball jumping landing techniques and reduction of ankle joint injury risk based on biomechanics analysis." Molecular & Cellular Biomechanics 21, no. 3 (2024): 600. http://dx.doi.org/10.62617/mcb600.

Full text

Abstract:

The ankle joint’s functional state is crucial during dynamic basketball movements, especially jumping and landing. A higher risk of ankle injuries is linked to limited ankle dorsiflexion, which can result in biomechanical alterations affecting landing safely and effectively. To improve basketball jumping landing skills and decrease the risk of ankle joint injuries, the objective of this research is to examine the way difficulties of dorsiflexion in the ankle influence the biomechanics of the lower extremities. Seventy-five participants completed basketball-specific stop-jumping actions on a fl

APA, Harvard, Vancouver, ISO, and other styles

29

Liu, Keping, Fengxia Liu, Shenquan Wang, and Yuanchun Li. "Finite-Time Spacecraft’s Soft Landing on Asteroids Using PD and Nonsingular Terminal Sliding Mode Control." Mathematical Problems in Engineering 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/510618.

Full text

Abstract:

This paper presents a continuous control law of probe, which consists of PD (proportional-derivative) controller and nonsingular terminal sliding mode controller for probe descending and landing phases, respectively, in the case of the asteroid irregular shape and low gravity. The probe dynamic model is deduced in the landing site coordinate system firstly. Then the reference trajectory based on optimal polynomial in open-loop state is designed, with the suboptimal fuel consumption. Taking into account different characteristics of phases, PD controller and nonsingular terminal sliding mode con

APA, Harvard, Vancouver, ISO, and other styles

30

Xu, Datao, Xinyan Jiang, Xuanzhen Cen, Julien S. Baker, and Yaodong Gu. "Single-Leg Landings Following a Volleyball Spike May Increase the Risk of Anterior Cruciate Ligament Injury More Than Landing on Both-Legs." Applied Sciences 11, no. 1 (2020): 130. http://dx.doi.org/10.3390/app11010130.

Full text

Abstract:

Volleyball players often land on a single leg following a spike shot due to a shift in the center of gravity and loss of balance. Landing on a single leg following a spike may increase the probability of non-contact anterior cruciate ligament (ACL) injuries. The purpose of this study was to compare and analyze the kinematics and kinetics differences during the landing phase of volleyball players using a single leg (SL) and double-leg landing (DL) following a spike shot. The data for vertical ground reaction forces (VGRF) and sagittal plane were collected. SPM analysis revealed that SL depicted

APA, Harvard, Vancouver, ISO, and other styles

31

Nguyen, Tien-Thanh, Charles Hamesse, Thomas Dutrannois, et al. "Visual-based Localization Methods for Unmanned Aerial Vehicles in Landing Operation on Maritime Vessel." Acta IMEKO 13, no. 4 (2024): 1–13. https://doi.org/10.21014/actaimeko.v13i4.1575.

Full text

Abstract:

Unmanned Aerial Vehicles (UAVs) have become increasingly important in maritime operations due to their ability to perform complex tasks that are difficult or dangerous for humans. However, accurate localization of these UAVs in maritime environments especially during landing operation on maritime vessels remains a challenge, particularly in GNSS denied areas. This paper proposes two visual-based localization methods for UAVs during two different phases of landing operating on maritime vessels. The first method is used for estimating the UAV's position with respect to the vessel during the appr

APA, Harvard, Vancouver, ISO, and other styles

32

Estevan, Isaac, Gonzalo Monfort-Torres, Roman Farana, David Zahradnik, Daniel Jandacka, and Xavier García-Massó. "Children’s Single-Leg Landing Movement Capability Analysis According to the Type of Sport Practiced." International Journal of Environmental Research and Public Health 17, no. 17 (2020): 6414. http://dx.doi.org/10.3390/ijerph17176414.

Full text

Abstract:

(1) Background: Understanding children’s motor patterns in landing is important not only for sport performance but also to prevent lower limb injury. The purpose of this study was to analyze children’s lower limb joint angles and impact force during single-leg landings (SLL) in different types of jumping sports using statistical parametric mapping (SPM). (2) Methods: Thirty children (53.33% girls, M = 10.16 years-old, standard deviation (SD) = 1.52) divided into three groups (gymnastics, volleyball and control) participated in the study. The participants were asked to do SLLs with the dominant

APA, Harvard, Vancouver, ISO, and other styles

33

Fu, Yanming, Xin Wang, and Tianbiao Yu. "Simulation Analysis of Knee Ligaments in the Landing Phase of Freestyle Skiing Aerial." Applied Sciences 9, no. 18 (2019): 3713. http://dx.doi.org/10.3390/app9183713.

Full text

Abstract:

The risk of knee injuries in freestyle skiing athletes that perform aerials is high. The internal stresses in the knee joints of these athletes cannot easily be directly measured. In order to ascertain the mechanical response of knee joints during the landing phase, and to explore the mechanism of damage to the cartilage and ligaments, a finite element model of the knee joint was established. Three successful landing conditions (neutral, backward, or forward landing) from a triple kicker were analyzed. The results demonstrate that the risk of cruciate ligament damage during a neutral landing w

APA, Harvard, Vancouver, ISO, and other styles

34

Li, Yongguo, Ruiqing Lv, and Jiangdong Wang. "A Control Strategy for Autonomous Approaching and Coordinated Landing of UAV and USV." Drones 9, no. 7 (2025): 480. https://doi.org/10.3390/drones9070480.

Full text

Abstract:

Unmanned aerial vehicles (UAVs) autonomous landing plays a key role in cooperative work with other heterogeneous agents. A neglected aspect of UAV autonomous landing on a moving platform is addressed in this study. The landing process is divided into three stages: positioning, tracking, and landing. In the tracking phase, MPCs are designed to implement tracking of the target landing platform. In the landing phase, we adopt a nested Apriltags collaboration identifier combined with the Aprilatags algorithm to design a PID speed controller, thereby improving the dynamic tracking accuracy of UAVs

APA, Harvard, Vancouver, ISO, and other styles

35

DOERSCHUK, PEGGY ISRAEL, and QING LIN. "INTELLIGENT CONTROL OF A SIMULATED RUNNING JOINTED LEG: THE LANDING PHASE." International Journal on Artificial Intelligence Tools 08, no. 03 (1999): 349–60. http://dx.doi.org/10.1142/s0218213099000233.

Full text

Abstract:

Controlling the running movement of a machine with jointed legs is a difficult problem in robotics. The control of a single running stride can be broken down into three phases; takeoff, ballistic, and landing. This paper describes the development of an intelligent controller for the landing phase of a simulated jointed leg's running stride. The landing controller takes control when the tool touches the ground after the airborne ballistic phase of the stride. It lears from experience to control the leg so as to recover from the impact with the ground and to reposition the leg for the takeoff of

APA, Harvard, Vancouver, ISO, and other styles

36

Tillman, Mark D., Rachel M. Criss, Denis Brunt, and Chris J. Hass. "Landing Constraints Influence Ground Reaction Forces and Lower Extremity EMG in Female Volleyball Players." Journal of Applied Biomechanics 20, no. 1 (2004): 38–50. http://dx.doi.org/10.1123/jab.20.1.38.

Full text

Abstract:

The purposes of this study were to analyze double-limb, dominant-limb, and nondominant-limb landings, each with a two-footed takeoff, in order to detect potential differences in muscle activity and ground reaction forces and to examine the possible influence of leg dominance on these parameters. Each of the three jump landing combinations was analyzed in 11 healthy female volleyball players (age 21 ± 3 yrs; height 171 ± 5 cm, mass 61.6 ± 5.5 kg, max. vertical jump height 28 ± 4 cm). Ground reaction forces under each limb and bilateral muscle activity of the vastus medialis, hamstrings, and lat

APA, Harvard, Vancouver, ISO, and other styles

37

Li, Yumeng, Jupil Ko, Marika A. Walker, Cathleen N. Brown, and Kathy J. Simpson. "Joint Coordination and Stiffness During Landing in Individuals With Chronic Ankle Instability." Journal of Applied Biomechanics 37, no. 2 (2021): 156–62. http://dx.doi.org/10.1123/jab.2020-0272.

Full text

Abstract:

The purpose of the present study was to examine the effect of chronic ankle instability (CAI) on lower-extremity joint coordination and stiffness during landing. A total of 21 female participants with CAI and 21 pair-matched healthy controls participated in the study. Lower-extremity joint kinematics were collected using a 7-camera motion capture system, and ground reaction forces were collected using 2 force plates during drop landings. Coupling angles were computed based on the vector coding method to assess joint coordination. Coupling angles were compared between the CAI and control groups

APA, Harvard, Vancouver, ISO, and other styles

38

Khalid, Adnan, Mujtaba Hussain Jaffery, Muhammad Yaqoob Javed, et al. "Performance Analysis of Mars-Powered Descent-Based Landing in a Constrained Optimization Control Framework." Energies 14, no. 24 (2021): 8493. http://dx.doi.org/10.3390/en14248493.

Full text

Abstract:

It is imperative to find new places other than Earth for the survival of human beings. Mars could be the alternative to Earth in the future for us to live. In this context, many missions have been performed to examine the planet Mars. For such missions, planetary precision landing is a major challenge for the precise landing on Mars. Mars landing consists of different phases (hypersonic entry, parachute descent, terminal descent comprising gravity turn, and powered descent). However, the focus of this work is the powered descent phase of landing. Firstly, the main objective of this study is to

APA, Harvard, Vancouver, ISO, and other styles

39

Hu, Jinchang, Xiangyu Huang, Maodeng Li, et al. "Entry vehicle control system design for the Tianwen-1 mission." Astrodynamics 6, no. 1 (2022): 27–37. http://dx.doi.org/10.1007/s42064-021-0124-y.

Full text

Abstract:

AbstractThe entry vehicle for the Tianwen-1 mission successfully landed on the surface of Mars at 7:18 AM BJT on May 15, 2021. This successful landing made China the first country to orbit, land, and release a rover in their first attempt at the Mars exploration. The guidance, navigation, and control (GNC) system plays a crucial role in the entry, descent, and landing (EDL) phases. This study focused on the attitude control component of the GNC system design. The EDL phase can be divided into several sub-phases, namely the angle of attack control phase, lift control phase, parachute descent ph

APA, Harvard, Vancouver, ISO, and other styles

40

Baker, Jeffrey, Angela Doehring, Jupil Ko, and Jae Yom. "The Effects of Limb Dominance on Lower Extremity Biomechanics During Side-Cut Landings." Asian Journal of Kinesiology 27, no. 2 (2025): 30–35. https://doi.org/10.15758/ajk.2025.27.2.30.

Full text

Abstract:

OBJECTIVES Non-contact anterior cruciate ligament (ACL) injuries are prevalent among females, with the majority occurring during the landing phase after airborne activity. While limb dominance has been proposed as a potential factor contributing to non-contact ACL injuries, research findings on this relationship remain inconsistent. Examining asymmetries in lower extremity landing mechanics between limbs prior to a side-cut may offer valuable insights into the role of limb dominance in non-contact ACL injuries. Therefore, our purpose of this study was to determine if limb dominance affects low

APA, Harvard, Vancouver, ISO, and other styles

41

Dong, J., Z. Sun, W. Rao, et al. "MISSION PROFILE AND DESIGN CHALLENGES FOR MARS LANDING EXPLORATION." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-3/W1 (July 25, 2017): 35–39. http://dx.doi.org/10.5194/isprs-archives-xlii-3-w1-35-2017.

Full text

Abstract:

An orbiter and a descent module will be delivered to Mars in the Chinese first Mars exploration mission. The descent module is composed of a landing platform and a rover. The module will be released into the atmosphere by the orbiter and make a controlled landing on Martian surface. After landing, the rover will egress from the platform to start its science mission. The rover payloads mainly include the subsurface radar, terrain camera, multispectral camera, magnetometer, anemometer to achieve the scientific investigation of the terrain, soil characteristics, material composition, magnetic fie

APA, Harvard, Vancouver, ISO, and other styles

42

Knight, K. "BEES USE THREE-PHASE LANDING STRATEGY." Journal of Experimental Biology 213, no. 2 (2009): i. http://dx.doi.org/10.1242/jeb.041483.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Ko, Chang-Yong, Yunhee Chang, Bora Jeong, Sungjae Kang, Jeicheong Ryu, and Gyoosuk Kim. "Effects of knee sleeves on coordination of lower-limb segments in healthy adults during level walking and one-leg hopping." PeerJ 5 (May 18, 2017): e3340. http://dx.doi.org/10.7717/peerj.3340.

Full text

Abstract:

The evaluation of multisegment coordination is important in gaining a better understanding of the gait and physical activities in humans. Therefore, this study aims to verify whether the use of knee sleeves affects the coordination of lower-limb segments during level walking and one-leg hopping. Eleven healthy male adults participated in this study. They were asked to walk 10 m on a level ground and perform one-leg hops with and without a knee sleeve. The segment angles and the response velocities of the thigh, shank, and foot were measured and calculated by using a motion analysis system. The

APA, Harvard, Vancouver, ISO, and other styles

44

BENMISRA, ABDELKADER, Hadjira BELAIDI, Abderahmane BELAIDI, Abdelhalim BRAHIMI, and Moufida IRKI. "Development of Instrumentation Adapted by C.M.M.S. Dedicate to Poly-articulated Mechanisms." Algerian Journal of Signals and Systems 6, no. 1 (2021): 61–66. http://dx.doi.org/10.51485/ajss.v6i1.4.

Full text

Abstract:

Abstract: In this article three study phases have been discussed: Landing phase of a civil transport aircraft,when part of the flow entering the reactors is redirected by thrust reversers. Phase of the functional andtechnical study of which reflects on the aircraft maintenance component, without forgetting the phase ofsynthesis of the landing system mechanisms. The approach presented relates to the description of thedifferent instruments and languages used for the control of vibratory behavior in a maintenance plan. Activedevices are used mainly in systems where the excitation acts permanently

APA, Harvard, Vancouver, ISO, and other styles

45

Garcia, Sébastien, Nicolas Delattre, Eric Berton, and Guillaume Rao. "Patellar Tendon Force Differs Depending on Jump-Landing Tasks and Estimation Methods." Applied Sciences 12, no. 1 (2022): 488. http://dx.doi.org/10.3390/app12010488.

Full text

Abstract:

Patellar tendinopathy is a chronic overuse injury of the patellar tendon which is prevalent in jump-landing activities. Sports activities can require jumping not only with a vertical component but also in a forward direction. It is yet unknown how jumping in the forward direction may affect patellar tendon forces. The main purpose of this study was to compare PTF between landings preceded by a vertical jump and a forward jump in volleyball players. The second purpose was to compare two different estimation methods of the patellar tendon force. Fifteen male volleyball players performed vertical

APA, Harvard, Vancouver, ISO, and other styles

46

Denoth, Jachen, Simon M. Luethi, and Hans H. Gasser. "Methodological Problems in Optimization of the Flight Phase in Ski Jumping." International Journal of Sport Biomechanics 3, no. 4 (1987): 404–18. http://dx.doi.org/10.1123/ijsb.3.4.404.

Full text

Abstract:

The flight distance in ski jumping depends largely on the initial conditions immediately after leaving the ramp, the aerodynamic position of the athlete during the flight, and his kinematic behavior during the landing phase. However, these variables are not mutually independent. An attempt to maximize the jumping length means that one is faced with the problem of optimization. This paper discusses the difficulties in the optimization of some of the influencing factors with respect to maximization of performance. Although a ski jump may be divided into distinct phases (approach run, takeoff, fl

APA, Harvard, Vancouver, ISO, and other styles

47

Kim, Young-Sam, and Min-Jea Tahk. "Auto-landing guidance for unmanned aerial vehicle with engine flame-out." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 233, no. 13 (2019): 4864–78. http://dx.doi.org/10.1177/0954410019831501.

Full text

Abstract:

Landing is the most dangerous phase of the entire flight phases. If the total loss of thrust occurs during flight, a powered aircraft converts to a glider, which can use kinetic and potential energy only. For this reason, a proper scheme is needed for safe landing in cases of the total loss of thrust. This paper presents three-dimensional unpowered auto-landing guidance based on trajectory generation, expanding the concept of the energy-to-range ratio. We develop the terminal velocity estimation method for a horizontal plane applied to three-dimensional space; this method is based on the previ

APA, Harvard, Vancouver, ISO, and other styles

48

Tingting, Yang, Li Aijun, Muhammad Taimoor, and Rooh ul Amin. "High AOA short landing robust control for an aircraft." Aircraft Engineering and Aerospace Technology 91, no. 1 (2018): 38–49. http://dx.doi.org/10.1108/aeat-05-2017-0134.

Full text

Abstract:

Purpose The purpose of this paper is to propose a high angle of attack short landing model for switched polytopic systems as well as to derive an equation for fluidic thrust vector deflection angle based on pressure to reduce the velocity during the landing phase of flight. Design/methodology/approach In this paper, robust control algorithm is proposed for a non-linear high angle of attack aircraft under the effects of non-linearities, tottering hysteresis, irregular and wing rock atmosphere. High angle of attack short landing flight under asynchronous switching is attained by using the robust

APA, Harvard, Vancouver, ISO, and other styles

49

Araña-Pulido, Víctor, B. Pablo Dorta-Naranjo, Francisco Cabrera-Almeida, and Eugenio Jiménez-Yguácel. "C Band 360° Triangular Phase Shift Detector for Precise Vertical Landing RF System." Applied Sciences 15, no. 15 (2025): 8236. https://doi.org/10.3390/app15158236.

Full text

Abstract:

This paper presents a novel design for precise vertical landing of drones based on the detection of three phase shifts in the range of ±180°. The design has three inputs to which the signal transmitted from an oscillator located at the landing point arrives with different delays. The circuit increases the aerial tracking volume relative to that achieved by detectors with theoretical unambiguous detection ranges of ±90°. The phase shift measurement circuit uses an analog phase detector (mixer), detecting a maximum range of ±90°and a double multiplication of the input signals, in phase and phase

APA, Harvard, Vancouver, ISO, and other styles

50

Aziz, Syazwana, Azmin Sham Rambely, Kok Beng Gan, and Wan Rozita Wan Din. "Kinetics Study in Parachute Landing Fall Technique by Comparing Professional and Amateur Malaysian Army Parachutists Using Kane’s Method." Mathematics 8, no. 6 (2020): 917. http://dx.doi.org/10.3390/math8060917.

Full text

Abstract:

This paper discusses the torque data during Parachute Landing Fall (PLF) activity on the sagittal plane by applying Kane’s method. The value of torque is determined in order to identify the movement of extension and flexion at every joint-segment on the parachutist during landing. Data were obtained from three professional and eighteen amateur parachutists, each with three consecutive landings. Quintic Biomechanics Software v26 was selected to capture motion analysis. The mathematical model for the PLF technique was presented based on a two-link kinematics open chain in a two-dimensional space

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!