Counterflow virtual impaction is used to inertially separate cloud elements from un-activated aerosol. Previous airborne, ground-based and laboratory studies using this technique exhibit artifacts that are not fully explained by impaction theory. We have performed laboratory studies that show small particles can be carried across the inertial barrier of the counterflow by collision and/or coale...

Flexible virtual capacitance control (FVCC) for converter can improve the stability and dynamics of DC bus voltage, but among multiple converters, essential inertia distribution is capable optimizing performance. To rationality distribution, a collaborative (VCCC) strategy energy storage units (ESUs) proposed. Firstly, system required total adjusted according to each individual battery's rated ...

In order to support the inertia of a microgrid, virtual synchronous generator control is suitable method. However, use leads unacceptable transient active power sharing, oscillations, and inverter output oscillation in event disturbance. This study aims propose deep neural network controller which combines features restricted Boltzmann machine multilayer network. To initialize unsupervised pret...

Weak grid conditions challenge the integration of offshore wind farms. Especially grids with low inertia and large impedance questions frequency voltage compliance capabilities. Grid-forming turbines are a promising technology for weak due to nature their control strategy. This paper explains difference in how described literature shows stability margin changes short-circuit ratio X/R ratio. Wi...

This paper informs the debate between the impact of content and form factors on presence. From cognitive principles, we predict that the content of a VE will affect presence by interacting with expectations held by the user. Furthermore, a particular cognitive tendency (thematic inertia), should facilitate the effect of the expectations. A sample of 461 users of desktop based flight simulations...

Primary frequency control in power systems is becoming more difficult as levels of non-synchronous generation grow. This paper explores how implementing a strategy based on the concept virtual inertia, supported by use battery energy storage (BESS), might positively impact stability grid. Particularly, this work centers its effort islanded microgrids hybrid generation: photovoltaic and diesel. ...

In this paper, inspired by the concept of virtual inertia in alternating current (AC) systems, a impedance controller is proposed for dynamic improvement direct microgrids (DCMGs). A simple and inexpensive method injecting into system used to adjust output power each distributed generation unit without using additional equipment. The consists two components: capacitor inductor. These components...

The generalized dynamic inversion control methodology is applied to the spacecraft attitude trajectory tracking problem. It is shown that the structure of the skew symmetric cross product matrix alleviates the need to include the inertia matrix in the control law. Accordingly, the proposed control law depends solely on attitude and angular velocity measurements, and it neither requires knowledg...

Torque-saturated control laws for spacecraft attitude control are considered. These control laws require no knowledge of the mass distribution of the spacecraft and thus are inertia-free. We examine two specific problems. In the first problem, the spacecraft has an arbitrary initial attitude and angular velocity, and the objective is to bring the spacecraft to rest with a specified attitude. In...