Results 151 to 160 of about 3,471 (201)
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Moratuwa Engineering Research Conference, 2022
The human ankle comprises multiple joints and supports triplanar motions to allow the foot to pronate or supinate during walking. However, ankle exoskeletons are mainly designed to assist propulsion whilst inhibiting other degrees of freedom.
R. Ranaweera +6 more
semanticscholar +1 more source
The human ankle comprises multiple joints and supports triplanar motions to allow the foot to pronate or supinate during walking. However, ankle exoskeletons are mainly designed to assist propulsion whilst inhibiting other degrees of freedom.
R. Ranaweera +6 more
semanticscholar +1 more source
Optimization of unpowered descents for commercial aircraft
11th AIAA Aviation Technology, Integration, and Operations (ATIO) Conference, 2011The problem of unpowered descents of commercial transport aircraft is analyzed. The procedure is optimized (maximizing range) using the theory of singular optimal control. The optimal control is of the bang-singular-bang type, and the optimal trajectories are formed by a singular arc and two minimum/maximum-path-angle arcs joining the singular arc with
Damián Rivas +2 more
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Unpowered Scooter Trauma or the Beginning of an Epidemic
Swiss Surgery, 2001But: Au vu de l'accroissement important et récent des accidents secondaires à la pratique de la trottinette à Genève et de l'absence de données disponibles sur ce sujet dans la littérature, nous avons décidé de lancer une étude exploratoire prospective afin de déterminer les circonstances et les conséquences de ce type de traumatisme.
null Lironi +3 more
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A Novel Design of Unpowered Exoskeleton for Loaded Walking Using Only Hip Abduction Torque
IEEE/ASME transactions on mechatronicsAn upper extremity device can help humans when they are walking with a load. However, when using such a device that does not have lower limb parts, the upper and lower bodies of the wearer should support the weight of the load.
O. Kang +5 more
semanticscholar +1 more source
Chinese Control and Decision Conference
This paper proposes a fractional-order time-varying nonsingular terminal sliding mode controller for attitude control of unpowered reentry vehicles. The system is able to converge in a finite time with the proposed controller. The introduced time-varying
Yuguang Yao, Shuo Pang, Jiahao Gan
semanticscholar +1 more source
This paper proposes a fractional-order time-varying nonsingular terminal sliding mode controller for attitude control of unpowered reentry vehicles. The system is able to converge in a finite time with the proposed controller. The introduced time-varying
Yuguang Yao, Shuo Pang, Jiahao Gan
semanticscholar +1 more source
Unpowered wireless transmission of ultrasound signals
Smart Materials and Structures, 2010This paper presents a wireless ultrasound sensing system that uses frequency conversion to convert the ultrasound signal to a microwave signal and transmit it directly without digitization. Constructed from a few passive microwave components, the sensor is able to sense, modulate, and transmit the full waveform of ultrasound signals wirelessly without ...
H Huang, D Paramo, S Deshmukh
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Autolanding Guidance Control for an Unpowered UAV
2018 IEEE CSAA Guidance, Navigation and Control Conference (CGNCC), 2018Unpowered autolanding is the final phase of a safe landing after a UAV loses power. This paper puts forward a guidance method for directing unpowered autolanding of a UAV. First, the autolanding track which consists of a line and arc is given. Second, the line and arc guidance laws are designed respectively, and then the guidance law is transformed ...
Huang Degang +3 more
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Unpowered wireless analog resistance sensor
SPIE Proceedings, 2004Our society depends heavily on a network of buildings, bridges and roadways. In order to properly maintain this civil infrastructure and avoid damage and costly repairs due to structural failure, it is necessary to monitor the health of these structures.
Matthew M. Andringa +2 more
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Stability analysis of mechanisms having unpowered degrees of freedom
Robotica, 1989SUMMARYThe stability analysis of active spatial mechanisms comprising both powered and unpowered joints is carried out for the first time using aggregation-decomposition method via Lyapunov vector functions. This method has already been used for analysis of mechanisms with all powered joints.
Branislav Borovac +2 more
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Unpowered opens test with X-ray laminography
Proceedings International Test Conference 1997, 2002It is shown how X-ray laminography can be used to detect solder opens. With this method X-ray images are taken of the device under test (DUT). The lead content in solder makes the solder joints appear clearly in the image. Using image processing algorithms and also calibration information, the captured image of the solder joint is automatically ...
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