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This paper presents the concept of electromagnetic satellite formation flight (EMFF), a novel propulsion mode of controlling the relative motion of satellite formation without propellant consumption. The alternative actuation system utilizes electromagnetic force, generated by the interaction of electromagnets around component spacecrafts, to transform the configuration. The linear equation of relative...
A method in allusion to the arbitrary waveforms source for using Numerical Inverse Laplace Transform (NILT) is proposed in this study. The principle of this method is to consider the arbitrary waveforms source containing of data points as discontinuous functions. By means of the unit step function, the discontinuous functions can be expressed as a unified form, and then the frequency domain expression...
The 1.5MW half-direct permanent magnet synchronous wind generator with 252 slots, 32 poles is investigated in this paper, and two kinds of generator designs according to permanent magnet embedded in different rotor positions are presented. Based on the fluid mechanics theory, the mathematical models of 3D fluid field that fluid flowing through the outer-surfaces of generators are established, and...
The 1.5MW half-direct permanent magnet synchronous wind generator with 252 slots, 32 poles is investigated in this paper, and two kinds of generator designs according to permanent magnet embedded in different rotor positions are presented. Based on the fluid mechanics theory, the mathematical models of 3D fluid field that fluid flowing through the outer-surfaces of generators are established, and...
For the short-range rendezvous problem, an approach of time-optimal multi-impulse rendezvous was put forward using hybrid genetic algorithm. Firstly, based on the state transition matrix of T-H equation, the mathematical models of time-optimal multi-impulse rendezvous was established and transformed into a nonlinear optimization problem, In order to obtain the global solution efficiently, a hybrid...
On the basis of grey theory model for medium-long term load forecasting, the paper improves the traditional grey model and brings forth the grey residual forecasting model for less prediction errors. At the same time, it uses fixed weight method of forecasting model--that is to choose weight with average precision of each model to build a optimization combination forecasting model. It forecasts with...
This paper is concerned with the problem of robust model predictive control for discrete-time systems with packet losses. A stochastic process satisfying Bernoulli random binary distribution is utilized to model the packet losses, and a parameter dependent Lyapunov function is adopted to reduce the conservatism. The aim is to design a state feedback controller which minimizes an upper bound on a quadratic...
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