The work done during each step to lift and to reaccelerate (in the forward direction) and center of mass has been measured during locomotion in bipeds (rhea and turkey), quadrupeds (dogs, stump-tailed macaques, and ram), and hoppers (kangaroo and springhare). Walking, in all animals (as in man), involves an alternate transfer between gravitational-potential energy and kinetic energy within each...

in this paper an energy dissipation rate control (edrc) method is introduced, which could provide stable walking or running gaits for legged robots. this method is realized by developing a semi-analytical pattern generation approach for a robot during each single support phase (ssp). as yet, several control methods based on passive dynamic walking have been proposed by researchers to provide an...

Despite the fact that the wind tunnel tests have been carried out on iced transmission lines subjected to wind load, it is not practical to do wind tunnel tests due to its high cost. This paper describes a detailed numerical simulation method that can be used to instead of wind tunnel tests. Based on the galloping mechanism of iced transmission lines, the aerodynamic test was simulated with the...

Article history: Received: 19.06.2014. Received in revised form: 06.11.2014. Accepted: 11.11.2014. According to the galloping mechanism of iced conductors, the aerodynamic simulations were performed based on actual wind tunnel tests. Aeroelastic models of single and bundled conductors with a typical ice-coating section forms (crescent section) were set up. The simulation results were in good ag...

Wake-galloping energy harvesting has been extensively developed to scavenge flow from vortex-induced oscillations. Hence, the wake-galloping harvester only a natural frequency which leads very narrow bandwidth. Therefore, it does not operate well under wide region of shedding frequencies in variable wind speed. To overcome vital issue, this paper we explored novel two-degree-of-freedom nonlinea...

Fluid–structure interactions of non-circular prisms are significance from a scientific and practical viewpoint. In this paper, we present new experimental observation flow-induced vibrations associated spectral characteristics transversely oscillating D-section prism at an angle attack ? varying 0° to 180°, where = 180° represent the configuration with upstream curved flat part, respectively. T...

Abstract Galloping is a critical type of flow-induced vibration (FIV) arising on power transmission lines, high rise buildings, pipe and cables bundles in the oil gas industry. In this paper, we present purely nonlinear energy sink (NES) that mitigates galloping square prism. The NES composed ball rotating freely circular track attached to ball’s dynamics coupled prism way by inertia. We experi...