Approaches to the application of magnetic fluids in electromechanical drive systems. - In: Engineering for a changing world, (2017), insges. 12 S.
This paper shows the approach of applications of magnetic liquids in electromechanical drive systems. Magnetic fluids consist of colloidal ferromagnetic nanoparticles, a particle surfactant and carrier liquid. These fluids are divided into two groups called ferrofluids and magneto-rheological fluids (MRF). Both liquids are examined in two different kinds of electric motor prototypes. Following the ideas of Nethe [4], a ferrofluid is located in the air gap of an electrical drive. The influence on torque and especially heat transfer is shown by experiments. The system is also studied analytically as a classical Taylor-Couette-System. A second motor prototype is a novel and innovative magnetorheological assisted electrical machine. The construction and the functional principle are presented in this paper. In addition, some of first measurements are shown.
http://nbn-resolving.de/urn:nbn:de:gbv:ilm1-2017iwk-057:9
Theoretical and experimental investigations of micro robots based on piezoelectric triangular plates. - In: Engineering for a changing world, (2017), insges. 19 S.
The creation of mobile miniature robots is an advanced and promising branch of modern engineering. The most important issues in the design of such robots are the development of propulsion and energy systems. The use of miniature electromechanical systems in the technological world is growing rapidly. Considering new applications the piezoelectric drive is a practical base to create miniature robots which move on different surfaces and in different media. Due to the small dimensions and low energy supply the development of piezoelectric platforms for miniature robots in the form of spheres, cylinders, plates with support rods can effectively solve many theoretical and practical problems. To study complex stress-strain states of plate-platforms for miniature robots methods of numerical analysis (finite element calculation) are used. This allows to obtain solutions of boundary value problems for plates with various shapes in conditions of a controlled resonance. This results can be compared with experimental data. This approach leads to a significant reduction of the design costs.
http://nbn-resolving.de/urn:nbn:de:gbv:ilm1-2017iwk-004:8
On the influence of the flexure hinge orientation in planar compliant mechanisms for ultra-precision applications. - In: Engineering for a changing world, (2017), insges. 10 S.
http://nbn-resolving.de/urn:nbn:de:gbv:ilm1-2017iwk-090:9
Surface shape stability analysis of a magnetic fluid in the field of an electromagnet. - In: Journal of fluid mechanics, ISSN 1469-7645, Bd. 830 (2017), S. 326-349
https://doi.org/10.1017/jfm.2017.488
Impact of insertion velocity on insertion forces in cochlear implantation surgery. - In: Biomedical engineering, ISSN 1862-278X, Bd. 62 (2017), S1, Seite S167
Enthalten in: Poster session 13: Organ and patient support systems I
https://doi.org/10.1515/bmt-2017-5034
Toward steerable electrodes : an overview of concepts and current research. - In: Current directions in biomedical engineering, ISSN 2364-5504, Bd. 3 (2017), 2, S. 765-769
https://doi.org/10.1515/cdbme-2017-0161
Individualized design of fluidically actuated cochlear implants. - In: Biomedical engineering, ISSN 1862-278X, Bd. 62 (2017), S1, Seite S280
Enthalten in: Session 33: Modelling and simulation II
https://doi.org/10.1515/bmt-2017-5054
Dynamic properties of magneto-sensitive elastomer cantilevers as adaptive sensor elements. - In: Smart materials and structures, ISSN 1361-665X, Volume 26 (2017), number 9, 095035, Seite 1-9
https://doi.org/10.1088/1361-665X/aa75ec
Indoor locomotion experiments of a spherical mobile robot based on a tensegrity structure with curved compressed members. - In: 2017 IEEE International Conference on Advanced Intelligent Mechatronics (AIM), ISBN 978-1-5090-6000-9, (2017), S. 523-528
This work presents theoretical and experimental investigations on an untethered rolling tensegrity robot. Previous research has shown, that rolling locomotion of compliant tensegrity robots can be realized without change of their shape, by using only internal mass shifting. The use of simple tensegrity structures, based on curved compressed members enables pure rolling locomotion in contrast to the most known prototypes of this kind. Therefore, theoretical and experimental investigations of an untethered locomotion system based on a simple tensegrity structure, consisting of two disconnected compressed curved members connected to a continuous net of twelve prestressed tensioned members with pronounced elasticity, are considered. Planar locomotion is induced by the movement of only two drive units as internal masses along the curved compressed members. Theoretical considerations show the influence of the geometrical system parameters on the movement behavior of the system. With the help of experimental investigations, by using motion-capturing technique, main properties of the locomotion performance of a prototype are discussed.
https://doi.org/10.1109/AIM.2017.8014070
Bristle-bots in swarm robotics - approaches on agent development and locomotion. - In: 2017 IEEE International Conference on Advanced Intelligent Mechatronics (AIM), ISBN 978-1-5090-6000-9, (2017), S. 1424-1429
Bristle-bots are vibration-driven mobile robots characterized by small size, high speed, simple design and low costs for production and application - qualities which are advantageous for agents of swarm robotics. Current studies have focused on their natural behaviour on confined spaces, navigation capabilities through pipes, and mathematical modelling of the bristle-based motion, however, trajectory generation capabilities were not evaluated. Therefore, this paper presents our robot "Donipodis", a mobile micro-robot for swarm robotics research. Our robot uses a single vibro-motor controlled over an 8-bit microprocessor that generates locomotion using bristles. It possess two IR receivers at its front as antennae and one IR transmitter at its back for peer-to-peer communications, an RGB colour identifier and IrDA communication for master host programming. A modelling of the micro-robot was also developed. Simulations and experimental results show a proper modelling of the locomotion and performance over displacement with slightly curved trajectories. Translation and rotation speeds characterization results show potential for controllable trajectory generation by varying the motor speed properties (PWM frequency and duty cycle) and direction.
https://doi.org/10.1109/AIM.2017.8014218