Damping of Pressure Pulsations in Mobile Hydraulic Applications by the Use of Closed Cell Cellular Rubbers Integrated into a Vane Pump
Publication date: October 2017 Source:Journal of Bionic Engineering, Volume 14, Issue 4 Author(s): David Bach, Tom Masselter, Thomas Speck Abstract The present study evaluates the potential of a bio-inspired pulsation damper in a vane pump used in mobile hydraulic applications. Pressure pulsations caused by such positive displacement pumps can lead to malfunctions and noise in a hydraulic system. A common measure to reduce pressure pulsations is the integration of pressure pulsation dampers downstream of the pump. This type of damping measure can also be found in biology as e.g. in the human blood circulatory system. ...
Source: Journal of Bionic Engineering - October 21, 2017 Category: Biotechnology Source Type: research
Wood Plastic Composites Prepared from Biodegradable Poly(butylene succinate) and Burma Padauk Sawdust (Pterocarpus macrocarpus): Water Absorption Kinetics and Sunlight Exposure Investigations
Publication date: October 2017 Source:Journal of Bionic Engineering, Volume 14, Issue 4 Author(s): Nawadon Petchwattana, Jakkid Sanetuntikul, Paranee Sriromreun, Borwon Narupai Abstract Wood plastic biocomposites of biodegradable poly (butylene succinate) (PBS) and Padauk sawdust was successfully prepared by using a twin screw extruder and an injection molding machine. The effects of water absorption and sunlight exposure on some properties of the composites were investigated. Water absorption of PBS composites was found to follow the Fick's law of diffusion, while the diffusion coefficient increased with increasing ...
Source: Journal of Bionic Engineering - October 21, 2017 Category: Biotechnology Source Type: research
Experimental and Numerical Study of Penguin Mode Flapping Foil Propulsion System for Ships
Publication date: October 2017 Source:Journal of Bionic Engineering, Volume 14, Issue 4 Author(s): Naga Praveen Babu Mannam, Parameswaran Krishnankutty, Harikrishnan Vijayakumaran, Richards Chizhuthanickel Sunny Abstract The use of biomimetic tandem flapping foils for ships and underwater vehicles is considered as a unique and interesting concept in the area of marine propulsion. The flapping wings can be used as a thrust producing, stabilizer and control devices which has both propulsion and maneuvering applications for marine vehicles. In the present study, the hydrodynamic performance of a pair of flexible flappin...
Source: Journal of Bionic Engineering - October 21, 2017 Category: Biotechnology Source Type: research
Research on Location Characteristics and Algorithms based on Frequency Domain for a 2D Underwater Active Electrolocation Positioning System
Publication date: October 2017 Source:Journal of Bionic Engineering, Volume 14, Issue 4 Author(s): Jiegang Peng, Yue Zhu, Tao Yong Abstract Weakly electric fish has an ability to generate a low-frequency electric field actively to locate the surrounding object in complete darkness by sensing the change of the electric field. This ability is called active electrolocation. In this paper, we designed a two-dimensional (2D) experimental platform of underwater active electrolocation system by simulating weakly electric fish. On the platform, location characteristics based on frequency domain were investigated. Results indi...
Source: Journal of Bionic Engineering - October 21, 2017 Category: Biotechnology Source Type: research
Comparison of Aerodynamic Forces and Moments Calculated by Three-dimensional Unsteady Blade Element Theory and Computational Fluid Dynamics
Publication date: October 2017 Source:Journal of Bionic Engineering, Volume 14, Issue 4 Author(s): Loan Thi Kim Au, Hoang Vu Phan, Hoon Cheol Park Abstract In previous work, we modified blade element theory by implementing three-dimensional wing kinematics and modeled the unsteady aerodynamic effects by adding the added mass and rotational forces. This method is referred to as Unsteady Blade Element Theory (UBET). A comparison between UBET and Computational Fluid Dynamics (CFD) for flapping wings with high flapping frequencies (>30 Hz) could not be found in literature survey. In this paper, UBET that considers ...
Source: Journal of Bionic Engineering - October 21, 2017 Category: Biotechnology Source Type: research
The Role of Soft Vein Joints in Dragonfly Flight
Publication date: October 2017 Source:Journal of Bionic Engineering, Volume 14, Issue 4 Author(s): Dan Hou, Zheng Zhong, Yajun Yin, Yihui Pan, Hongxiao Zhao Abstract Dragonflies are excellent flyers among insects and their flight ability is closely related to the architecture and material properties of their wings. The veins are main structure components of a dragonfly wing, which are found to be connected by resilin with high elasticity at some joints. A three-dimensional (3D) finite element model of dragonfly wing considering the soft vein joints is developed, with some simplifications. Passive deformation under a...
Source: Journal of Bionic Engineering - October 21, 2017 Category: Biotechnology Source Type: research
Automated Kinematics Measurement and Aerodynamics of a Bioinspired Flapping Rotary Wing
Publication date: October 2017 Source:Journal of Bionic Engineering, Volume 14, Issue 4 Author(s): Jianghao Wu, Jian Qiu, Yanlai Zhang Abstract A physical model for a micro air vehicle with Flapping Rotary Wings (FRW) is investigated by measuring the wing kinematics in trim conditions and computing the corresponding aerodynamic force using computational fluid dynamics. In order to capture the motion image and reconstruct the positions and orientations of the wing, the photogrammetric method is adopted and a method for automated recognition of the marked points is developed. The characteristics of the realistic wing ki...
Source: Journal of Bionic Engineering - October 21, 2017 Category: Biotechnology Source Type: research
Effect of Flexible Spine Motion on Energy Efficiency in Quadruped Running
Publication date: October 2017 Source:Journal of Bionic Engineering, Volume 14, Issue 4 Author(s): Dongliang Chen, Ningjie Li, Hong Wang, Lei Chen Abstract Energy efficiency is important in the performance of quadruped robots and mammals. Flexible spine motion generally exists in quadruped mammals. This paper mainly explores the effect of flexible spinal motion on energy efficiency. Firstly, a planar simplified model of the quadruped robot with flexible spine motion is introduced and two simulation experiments are carried out. The results of simulation experiments demonstrate that both spine motion and spinal flexibi...
Source: Journal of Bionic Engineering - October 21, 2017 Category: Biotechnology Source Type: research
Simulation Architecture for Modelling Interaction Between User and Elbow-articulated Exoskeleton
Publication date: October 2017 Source:Journal of Bionic Engineering, Volume 14, Issue 4 Author(s): Bas J. de Kruif, Emilio Schmidhauser, Konrad S. Stadler, Leonard W. O'Sullivan Abstract The aim of our work is to improve the existing user-exoskeleton models by introducing a simulation architecture that can simulate its dynamic interaction, thereby altering the initial motion of the user. A simulation architecture is developed that uses the musculoskeletal models from OpenSim, and that implements an exoskeleton control algorithm and human response model in Matlab. The musculoskeletal models need to be extended with th...
Source: Journal of Bionic Engineering - October 21, 2017 Category: Biotechnology Source Type: research
A Case Study of a Force-myography Controlled Bionic Hand Mitigating Limb Position Effect
Publication date: October 2017 Source:Journal of Bionic Engineering, Volume 14, Issue 4 Author(s): Diego Ferigo, Lukas-Karim Merhi, Brittany Pousett, Zhen Gang Xiao, Carlo Menon Abstract Force Myography (FMG), which monitors pressure or radial deformation of a limb, has recently been proposed as a potential alternative for naturally controlling bionic robotic prostheses. This paper presents an exploratory case study aimed at evaluating how FMG behaves when a person with amputation uses a hand prosthetic prototype. One volunteer (transradial amputation) participated in this study, which investigated two experimental ...
Source: Journal of Bionic Engineering - October 21, 2017 Category: Biotechnology Source Type: research
Analysis of Finger Muscular Forces using a Wearable Hand Exoskeleton System
Publication date: October 2017 Source:Journal of Bionic Engineering, Volume 14, Issue 4 Author(s): Suin Kim, Jeongsoo Lee, Joonbum Bae Abstract In this paper, the finger muscular forces were estimated and analyzed through the application of inverse dynamics-based static optimization, and a hand exoskeleton system was designed to pull the fingers and measure the dynamics of the hand. To solve the static optimization, a muscular model of the hand flexors was derived. The experimental protocol was devised to analyze finger flexors in order to evaluate spasticity of the clenched fingers; muscular forces were estimated whi...
Source: Journal of Bionic Engineering - October 21, 2017 Category: Biotechnology Source Type: research
Mesoporous Bioactive Glass Functionalized with AIEgens for pH Sensing and Drug Delivery
Publication date: October 2017 Source:Journal of Bionic Engineering, Volume 14, Issue 4 Author(s): Dongdong Li Abstract Multifunctional materials combining fluorescence for drug delivery have been successfully developed by post grafted Aggregation-Induced Emission luminogens (AIEgens) onto Mesoporous Bioactive Glass (MBG). The synthesized hybrid materials combine porous structure of MBG and strong luminescence of AIEgens, showing ordered two-dimensional hexagonal mesostructure and strong blue emission. It is worth noting that the emission color of the hybrid materials can reversible cycled between blue and yellow by cha...
Source: Journal of Bionic Engineering - October 21, 2017 Category: Biotechnology Source Type: research
Analysis of Bone Remodeling Under Piezoelectricity Effects Using Boundary Elements
Publication date: October 2017 Source:Journal of Bionic Engineering, Volume 14, Issue 4 Author(s): Miguel Cerrolaza, Vannessa Duarte, Diego Garzón-Alvarado Abstract Piezoelectric materials exhibit a response to mechanical-electrical coupling, which represents an important contribution to the electrical-mechanical interaction in bone remodeling process. Therefore, the study of the piezoelectric effect on bone remodeling has high interest in applied biomechanics. The effects of mechano-regulation and electrical stimulation on bone healing are explained. The Boundary Element Method (BEM) is used to simulate piezoelectri...
Source: Journal of Bionic Engineering - October 21, 2017 Category: Biotechnology Source Type: research
Polyhydroxybutyrate/Hydroxyapatite Highly Porous Scaffold for Small Bone Defects Replacement in the Nonload-bearing Parts
Publication date: October 2017 Source:Journal of Bionic Engineering, Volume 14, Issue 4 Author(s): Fedor Senatov, Natalia Anisimova, Mikhail Kiselevskiy, Aleksey Kopylov, Viktor Tcherdyntsev, Aleksey Maksimkin Abstract In the present work, Polyhydroxybutyrate (PHB)/Hydroxyapatite (HA) porous composites (10%, 20%, 30 %, 40%, 50% weight HA) were obtained by sintering. PHB/20% HA optimally combines satisfactory mechanical properties with a high content of the bioactive component (HA). Porous PHB/20% HA scaffolds have shown high mechanical properties (compressive strength of 106 MPa and Young's modulus of 901 MPa). A h...
Source: Journal of Bionic Engineering - October 21, 2017 Category: Biotechnology Source Type: research
Effects of Surface Oxidation Treatment of Carbon Fibers on Biotribological Properties of CF/PEEK Materials
Publication date: October 2017 Source:Journal of Bionic Engineering, Volume 14, Issue 4 Author(s): Xiaoduo Zhao, Dangsheng Xiong, Xinxin Wu Abstract Carbon Fiber (CF) reinforced polyetheretherketone (PEEK) composite is one of the most promising implant biomaterials used in orthopedics. In this article, unfilled PEEK and CF/PEEK specimens were prepared by vacuum hot pressing method, and their tribological properties were evaluated by sliding against a cobalt-chromium-molybdenum (Co-Cr-Mo) alloy block. The influences of mass fraction of carbon fibers in CF/PEEK and the surface oxidation treatment of carbon fibers were e...
Source: Journal of Bionic Engineering - October 21, 2017 Category: Biotechnology Source Type: research
