Minimally invasive mastoidectomy approach using a mouldable surgical targeting system : a proof of concept. - In: Biomedical engineering, ISSN 1862-278X, Bd. 63 (2018), S1, Seite S247
Enthalten in: Computer Assisted Surgery
https://doi.org/10.1515/bmt-2018-6046
detasFLEX - a computational design tool for the analysis of various notch flexure hinges based on non-linear modeling. - In: Mechanical sciences, ISSN 2191-916X, Bd. 9 (2018), 2, S. 389-404
A novel computational design tool to calculate the elasto-kinematic flexure hinge properties is presented. Four hinge contours are implemented. It is shown, that FEM results correlate well with the analytical design tool results. For a given deflection angle of 10˚ and a corner-filleted contour, the deviations of the bending stiffness are between 0.1 % and 9.4 %. The design tool can be beneficial for the accelerated and systematic synthesis of compliant mechanisms with optimized flexure hinges.
https://doi.org/10.5194/ms-9-389-2018
Investigation of ultra-low insertion speeds in an inelastic artificial cochlear model using custom-made cochlear implant electrodes. - In: European archives of oto-rhino-laryngology and head & neck, ISSN 1434-4726, Bd. 275 (2018), 12, S. 2947-2956
https://doi.org/10.1007/s00405-018-5159-1
Signal tuning of observables at the support of a vibrissa-like tactile sensor in different scanning scenarios. - In: High tech human touch, ISBN 978-1-5386-8183-1, (2018), S. 1138-1143
https://doi.org/10.1109/BIOROB.2018.8487961
Motion characteristics of a vibration driven mobile tensegrity structure with multiple stable equilibrium states. - In: Journal of sound and vibration, ISSN 0022-460X, Bd. 437 (2018), S. 198-208
https://doi.org/10.1016/j.jsv.2018.09.019
Histological evaluation of a cochlear implant electrode array with electrically activated shape change for perimodiolar positioning. - In: Current directions in biomedical engineering, ISSN 2364-5504, Bd. 4 (2018), 1, S. 145-148
https://doi.org/10.1515/cdbme-2018-0036
Impact of anatomical variations on insertion forces : an investigation using artificial cochlear models. - In: Current directions in biomedical engineering, ISSN 2364-5504, Bd. 4 (2018), 1, S. 509-512
https://doi.org/10.1515/cdbme-2018-0122
Minimally invasive mastoidectomy approach using a mouldable surgical targeting system : a proof of concept. - In: Current directions in biomedical engineering, ISSN 2364-5504, Bd. 4 (2018), 1, S. 403-406
https://doi.org/10.1515/cdbme-2018-0096
Dynamical investigation of crawling motion system based on a multistable tensegrity structure. - In: ICINCO 2018, (2018), S. 122-130
The basic idea of this article is the utilization of the multistable character of a compliant tensegrity structure to control the direction of motion of a crawling motion system. A crawling motion system basing on a two-dimensional tensegrity structure with multiple stable equilibrium states is considered. This system is in contact with a horizontal plane due to gravity. For a selected harmonic actuation of the system small oscillations around the given equilibrium state of the tensegrity structure occur and the corresponding uniaxial motion of the system is evaluated. A change of the equilibrium state of the tensegrity structure yields to novel configuration of the entire system. Moreover, the motion behavior of the novel configuration is totally different although the actuation strategy is not varied. In particular, the direction of motion changes. Therefore, this approach enables a uniaxial bidirectional crawling motion with a controllable direction of motion using only one actuato r with a selected excitation frequency.
Gait transitions in artificial non-standard snake-like locomotion systems using adaptive control. - In: Dynamical Systems in Applications, (2018), S. 1-12
This chapter contributes to the modeling, analysis and control of terrestrial artificial locomotion systems. Inspired by previous models, we set up an unconventional model for a snake-like locomotion systems in form of a chain of visco-elastically interconnected mass points in a plane with passive joints, but - in contrast to literature - active links (time-varying link-length) and rotatable skids to change the movement direction and to avoid obstacles. We investigate this model in a dynamical way and focus on controlling these link lengths to achieve a global movement, steered by the skids. From dynamics, the actuator forces have to adjust the prescribed link length for the locomotion. Since it is impossible to determine the necessary actuator forces a-priori, we apply an adaptive lambda-tracking controller to enable the system to adjust these force outputs on-line on its own. Prescribed motion patterns, i.e. specific gaits, are required to guarantee a controlled movement that differ in the number of resting mass points, the load of actuators and spikes, and the lateral forces of the skids. In contrast to literature, the investigated system of n = 10 mass points exhibit a large variety of possible gaits. To determine the most advantageous gaits, numerical investigations are performed and a weighting function offers a decision of best possible gaits. Using these gaits, a gait transition algorithm, which autonomously changes velocity and number of resting mass points depending on the spike, actuator and lateral skid force load, is presented and tested in numerical simulations.
https://doi.org/10.1007/978-3-319-96601-4_1