General relativity and quantum mechanics are conflicting theories. The seeds of discord are the fundamental principles on which these theories are grounded. General relativity, on one hand, is based on the equivalence principle, whose strong version establishes the local equivalence between gravitation and inertia. Quantum mechanics, on the other hand, is fundamentally based on the uncertainty ...

Spin-stabilisation of spacecraft is considered a simple and relatively effective way of ensuring passive attitude stability and has therefore seen wide application. However, very few spin-stabilised spacecraft are prolate (long and slender), likely due to the fact that spin-stabilising a prolate spacecraft is dynamically unstable in the presence of energy dissipation due to e.g. fuel sloshing. ...

the constitutive relationships of the rubber materials that act as the main spring of a hydraulic engine mount are nonlinear. in addition to material induced nonlinearity, further nonlinearities may be introduced by mount geometry, turbulent fluid behavior, temperature, boundary conditions, decoupler action, and hysteretic behavior. in this research all influence the behavior of the system only...

Wind turbines can have inertia characteristics similar to synchronous generators through virtual control, which helps provide the support for system. However, there is problem of how coordinate allocation among wind turbines. In response this problem, paper first analyzes capabilities and puts forward an evaluation index that quantifies capability The a farm evaluated at entire system level. Ba...

The goal of this study was to identify drivers of environmental impact and quantify their influence on the environmental performance of wooden and massive residential and office buildings. We performed a life cycle assessment and used thermal simulation to quantify operational energy demand and to account for differences in thermal inertia of building mass. Twenty-eight input parameters, affect...

Wind turbine (WT) control is being adapted to enable inertia provision that supports network frequency on short timescales. Measuring the contribution from wind turbines critical asses of service as well understand WT operation. However, measurement methods disagree impact and how approximate its effects. This paper uses data a ScottishPower Renewables (SPR) test grid connected farm highlight c...

An e®ective inertia of a serially jointed chain of bodies, such as a robotic arm, is often referred to as the articulated or operational space inertia. Six principal axes and six principal values of inertia are proposed to decouple articulated inertia into geometric and constitutive properties respectively. In the case of a single rigid body, these concepts naturally coincide with familiar desc...