Limited research has been done on exoskeletons to enable faster movements of the lower extremities. An exoskeleton’s mechanism can actually hinder agility by adding weight, inertia and friction to the legs; compensating inertia through control is particularly difficult due to instability issues. The added inertia will reduce the natural frequency of the legs, probably leading to lower step freq...

One of the most powerful results of recent advances in graphics hardware is the ability of a computer user to interactively explore a virtual building or landscape. The newest three-dimensional input devices, together with high speed 3D graphics workstations, make it possible to view and move through a 3D scene by interactively controlling the motion of a virtual camera. In this paper, we descr...

Abstract In recent years, the penetration rate of installed new energy generation has been increasing, inertia system reduced, damping weakened, and anti-disturbance ability resulting in possible frequency oscillation after disturbance, which brings potential problems to safe steady operation power system. For this problem, a grid-forming control strategy storage converter is proposed, based on...

Frequency regulation of low inertia symmetric micro grids with the incorporation asymmetric renewable sources such as solar and wind is a challenging task. Virtual Inertia Control (VIC) idea increasing grids’ by energy storage systems. In current study, an adaptive fuzzy PID structure derivative filter (AFPIDF) controller suggested for VIC grid sources. To optimize proposed controllers, modifie...

Rising levels of non-synchronous generation in power systems are leading to increasing difficulties primary frequency control. In response, there has been much research effort aimed at providing individual electronic interfaced generators with different response capabilities. There is now a growing interest analyzing the interactions among system elements that include these features. This paper...

Structural flexibility in spacecraft can degrade the accuracy of the attitude control system. With this motivation in mind, we compare the performance of inertia-free attitude control laws for a spacecraft with an undamped discrete flexible mode and demonstrate robustness with respect to unmodeled spacecraft dynamics and actuator saturation. First the equations of motion are derived using Lagra...

The use of high penetration converter-interfaced renewable energy (RE) based microgrids (MGs), due to the absence rotational masses from conventional synchronous generators (SGs), may lead a lack inertia, which steeper frequency and voltage fluctuations that in turn cause instability issues challenges normal operation sensitive loads. To suppress these enhance MGs stability, novel model predict...

BACKGROUND AND AIMS Clinical inertia is considered a major barrier to better care. We assessed its prevalence, predictors and associations with the intermediate outcomes of diabetes care. MATERIALS AND METHODS Baseline and follow-up data of a Dutch randomized controlled trial on the implementation of a locally adapted guideline were used. The study involved 30 general practices and 1283 patie...

Due to high penetration of renewable generation in power systems, and the need provide interface between distributed energy resources, split-source inverter (SSI) provides both boosting conversion capabilities one single-stage. Also for converter-based artificial inertia has become more important. In this paper a model-predictive control (MPC) based on virtual synchronous generator (VSG) algori...