Results 141 to 150 of about 25,565 (312)

Hierarchical gain scheduling based tilt angle guided robust control during mode transition for tilt-rotor unmanned aircraft vehicle

International Journal of Advanced Robotic Systems
Tilt-rotor unmanned aircraft vehicle has the potential to combine vertical take-off and landing capability with efficient, high-speed cruise flight. However, the mode transition process is risky owing to the internal continuous time change of aerodynamic
Hongyu Nie, Feng Gu, Yuqing He
doaj   +1 more source

Dynamic model and control of a new quadrotor unmanned aerial vehicle with tilt-wing mechanism [PDF]

, 2008
In this work a dynamic model of a new quadrotor aerial vehicle that is equipped with a tilt-wing mechanism is presented. The vehicle has the capabilities of vertical take-off/landing (VTOL) like a helicopter and flying horizontal like an airplane ...
Aksit, Mahmut Faruk, Akşit, Mahmut Faruk, Cetinsoy, Ertugrul, Gulez, Kayhan, Gülez, Kayhan, Kandemir, İlyas, Kandemir, Ilyas, Oner, Kaan Taha, Unel, Mustafa, Çetinsoy, Ertuğrul, Öner, Kaan Taha, Ünel, Mustafa   +11 more
core  

Tendon‐Driven Compliant Wheel‐Less Snake Robot for Undulatory Locomotion Using Conformable Ground Contacts

Advanced Intelligent Systems, EarlyView.
This study presents a tendon‐driven compliant snake robot that uses globally applied vertical bending and axial twisting along its body to enable various gaits. Body deflection from compliance and weight passively generates the ground contact patterns required for locomotion.
Serdar Incekara, Seongil Kwon, Gangil Kwon, Junhyoung Ha   +3 more
wiley   +1 more source

Maneuverable Multilegged Locomotion through Anisotropically Arranged Soft Backbones in a Single‐Actuator Modular Miniature Robot

Advanced Intelligent Systems, EarlyView.
A modular eight‐legged robot exploits anisotropically oriented soft I‐beam backbones to transmit vibration from a single unbalanced‐mass actuator, producing frequency‐dependent multimodal gaits. A pseudo‐rigid‐body model enables high‐fidelity MuJoCo simulation, while Bayesian parameter identification and reinforcement learning yield robust control ...
Yiğit Yaman, Burak Arslan, Ömer Çağrı Ergin, Daniel M. Aukes, Onur Özcan   +4 more
wiley   +1 more source

NASA/HAA Advanced Rotorcraft Technology and Tilt Rotor Workshop. Volume 7: Tilt Rotor Session [PDF]

The technical characteristics of the XV-15 aircraft were discussed. Program objectives, concept evaluation, tilt rotor experiments and civil market applications are presented.

core   +1 more source

Structured Plant‐Based Oil as Healthier Alternatives to Conventional Fats in Chocolate Cream Fillings

Journal of the American Oil Chemists' Society, EarlyView.
ABSTRACT This study investigated the use of oleogel systems as fat replacements in chocolate cream fillings. Oleogels were prepared with 4, 6, 8, or 10% of sunflower wax (SW) or glycerol monostearate (GM) in corn oil (CO) or sesame oil (SO). Four representative oleogels, SOSW4, SOSW6, SOGM6, and COGM6, were selected for application in chocolate cream ...
Md. Jannatul Ferdaus, Niaz Mahmud, Jiana Rebeca Matamoros, Lina Casale Aragon‐Alegro, Roberta Claro da Silva   +4 more
wiley   +1 more source

Use of active control systems to improve bending and rotor flapping response of a tilt rotor VTOL airplane [PDF]

The results are summarized of an analytical study of the use of active control systems for the purpose of reducing the root mean square response of wing vertical bending and rotor flapping to atmospheric turbulence for a tilt-rotor VTOL airplane.
Cheng, Y., Whitaker, H. P.
core   +1 more source

Polymer‐Crosslinking System‐Filler Interactions in Polychloroprene Adhesives: Experimental and Molecular Modeling Insights

Journal of Applied Polymer Science, EarlyView.
The use of polychloroprene is common in elastomeric adhesives. This study highlights the possible substitution of zinc oxide curing systems to a less hazardous metal complex, also evaluating the changes that higher surface area fillers can bring to the adhesive.
Gabriel Bachega Rosa, Sandra Aparecida Coelho Mello, Lucas Sousa Madureira, Silvana Navarro Cassu   +3 more
wiley   +1 more source

System for Controlling a Magnetically Levitated Rotor [PDF]

, 2006
In a rotor assembly having a rotor supported for rotation by magnetic bearings, a processor controlled by software or firmware controls the generation of force vectors that position the rotor relative to its bearings in a "bounce" mode in which the rotor
Morrison, Carlos R.
core   +1 more source

Improving Oxygen Barrier Performance of Polylactide Film by Using Bleached and Unbleached Nanocellulose From Grape Pomace

Journal of Applied Polymer Science, EarlyView.
Bleached and unbleached nanocelluloses were produced from the exhausted grape pomace and applied as coatings on PLA substrates for sustainable food packaging. Unbleached nanocelluloses were more hydrophobic and amorphous than bleached ones. The resulting bio‐based bleached nanocellulose‐coated PLA films showed a 68% reduction in O2 permeability ...
Jingwen Chen, Nadia O. Okamoto‐Schalch, Maria Gabriela B. Dalben, Sandra Domenek, Chloé Chevigny, Giana Almeida, Milena Martelli‐Tosi   +6 more
wiley   +1 more source