Results 71 to 80 of about 532,393 (243)

A passively adaptive screwdriver: a novel concept for controlling off-diagonal stiffness [PDF]

, 2006
A concept for an automated screw driving mechanism is presented. The proposed mechanism has a self-adjusting axial stiffness that depends on the torsional resistance against screwing.
Aitchison, D. R., Ilanko, Sinniah, McCallion, H.   +2 more
core   +2 more sources

Differential Spiral Joint Mechanism for Coupled Variable Stiffness Actuation

, 2023
In this study, we present the Differential Spiral Joint (DSJ) mechanism for variable stiffness actuation in tendon-driven robots. The DSJ mechanism semi-decouples the modulation of position and mechanical stiffness, allowing independent trajectory tracking in different parameter space. Past studies show that increasing the mechanical stiffness achieves
Kim, Mincheol, Deshpande, Ashish
openaire   +2 more sources

Leveraging Elastic instabilities for Amplified Performance: spine-inspired high-speed and high-force soft robots

, 2020
Soft machines typically exhibit slow locomotion speed and low manipulation strength because of intrinsic limitations of soft materials. Here, we present a generic design principle that harnesses mechanical instability for a variety of spine-inspired fast
Chi, Y, Huang, TH, Maghsoudi, OH, Spence, A, Spence, Andrew|, Su, H, Sun, J, Tang, Y, Yin, J, Zhao, J   +9 more
core   +1 more source

Pulmonary artery stiffness in chronic obstructive pulmonary disease (copd) and emphysema: The Multi-Ethnic Study of Atherosclerosis (MESA) COPD Study [PDF]

, 2018
Purpose: Chronic obstructive pulmonary disease (COPD) and particularly emphysema are characterized by stiffness of the aorta, due in part to accelerated elastin degradation in the lungs and aorta. Stiffness of the pulmonary arteries (PAs) may also be
Balte, Pallavi, Barr, R. Graham, Bluemke, David A., Carr, James, Dashnaw, Stephen, Gomes, Antoinette S., Hoffman, Eric A., Kawut, Steven M., Lima, Joao A.C., Liu, Chia-Ying, McAllister, David A., Parikh, Megha, Poor, Hooman D.   +12 more
core   +1 more source

The cLVSM: A Novel Compact Linear Variable Stiffness Mechanism Based on Circular Beams

Chinese Journal of Mechanical Engineering
Variable stiffness mechanisms (VSMs) are a class of compliant mechanisms that can adjust their intrinsic stiffness, which promises to be beneficial in applications needed to interact with the environment, such as collaborative robots, wearable robots ...
Yixin Shao, Yufeng Zhou, Di Shi, Yanggang Feng, Xilun Ding, Wuxiang Zhang   +5 more
doaj   +1 more source

Application of traction drives as servo mechanisms [PDF]

The suitability of traction drives for a wide class of aerospace control mechanisms is examined. Potential applications include antenna or solar array drive positioners, robotic joints, control moment gyro (CMG) actuators and propeller pitch change ...
Loewenthal, S. H., Rohn, D. A., Steinetz, B. M.   +2 more
core   +1 more source

Research on the Range of Stiffness Variation in a 2D Biomimetic Spinal Structure Based on Tensegrity Structures

Biomimetics
This paper presents a novel variable stiffness mechanism, namely the SBTDTS (Spinal Biomimetic Two-Dimensional Tensegrity Structure), which is constructed by integrating bioinspiration derived from biological spinal structures with the T-Bar mechanical ...
Xiaobo Zhang, Zhongcai Pei, Zhiyong Tang
doaj   +1 more source

A novel stiffness model for a wall-climbing hexapod robot based on nonlinear variable stiffness

Advances in Mechanical Engineering, 2018
In this article, the most contribution is to propose a novel general stiffness model to analyze the stiffness of a wall-climbing hexapod robot. First, we propose a new general stiffness model of serial mechanism, which includes the linear and nonlinear ...
Bin He, Shoulin Xu, Zhipeng Wang
doaj   +1 more source

Autonomous Energy Transducer: Proposition, Example, Basic Characteristics

, 2003
We propose a concept of autonomous energy transducer at a molecular scale, where output is produced with small input energy, of the same order of the thermal energy, without restriction of magnitude or timing of input, and without any control after the ...
Edman, Feynmann, Hatori, Ishijima, Ishijima, Jülicher, Kitamura, Kunihiko Kaneko, Lu, Magnasco, Nakagawa, Nakagawa, Nakagawa, Naoko Nakagawa, Nishiyama, Oosawa, Oosawa, Parmeggiani, Salerno, Shingyoji, Vale, Wazawa, Yanagida   +22 more
core   +1 more source

Design of A Novel Passive Binary-Controlled Variable Stiffness Joint (BpVSJ) Towards Passive Haptic Interface Application

IEEE Access, 2018
In this paper we present the design, development and experimental validation of a novel Binary-Controlled Variable Stiffness Joint (BpVSJ) towards haptic teleoperation and human interaction manipulators applications.
Mohammad I. Awad, Dongming Gan, Irfan Hussain, Ali Az-Zu'bi, Cesare Stefanini, Kinda Khalaf, Yahya Zweiri, Jorge Dias, Lakmal D. Seneviratne   +8 more
doaj   +1 more source