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A novel model of space electromagnetic docking is established to solve the problem of traditional plume contamination and short service life in this paper. A new modelling technique regarding space electromagnetic docking for CubeSat is proposed. The mathematical model with four core-containing energized solenoids is derived and simplified to the magnetic dipole far-field model of single-turn coil...
This paper includes mixed matrix estimation of underdetermined blind source separation (UBSS) under the anechoic mixing model and introduces single source points to the anechoic mixing model. First, we adopt a clustering algorithm to get the amplitude in the mixing matrix. Then, utilizing the amplitudes, We use a single source point detection method to determine the presence of only one source signal...
The current controller with fast transient response and satisfactory steady state characteristics is required in PMSM Servo System. In this paper, the application of active disturbance rejection control (ADRC) for current loop is proposed and the design proceeding of a first- order ADRC controller in the current loop is elaborated. Then, by taking use of the ADRC controller and the analysis of the...
Guidance is critical for a probe to land on the moon surface successfully. This paper mostly discusses about the guidance law in deceleration process of lunar soft landing. Based on some hypothesis, it creates the dynamics model which is built in the coordinate system of soft landing. Then the suboptimal fuel-consuming guidance law is designed for the purpose of reducing fuel consumption. Output errors...
After rendezvous and docking, the mass and mass center of target satellite can change greatly. In order to identify the mass and mass center of target satellite, research is made about the identification of mass and mass center about target satellite. As to the mass of target satellite, according to the information when the tracking satellite is located in different relatively stable position with...
This paper presents a stochastic Newton method to compute the switching angles in multilevel converters so as to produce the required fundamental voltage while at the same time not generate higher order harmonics. For Newton method, a good initial guess which should be very close to exact solution patterns is necessary, so using stochastic techniques gives a new way to find possible initial values,...
Offshore wind energy has become an increasingly attractive option due to the enormous energy potential associated with the vast offshore areas. The investigation of offshore wind turbines characterized by large-scale involves high performance wind turbine simulator, especially in the case of the development of optimal control strategy. Because of the increasing rotor size and the spatial load variations...
In this study, we analyze the impact of different types of frame traffic on the self-similar behavior of the aggregated frame traffic, collected from the IETF 2005 conference. Our measurement results show that the different types of frame traffic have various impacts on the self-similarity of the aggregated frame traffic in different session periods, and these impacts are simultaneously related with...
Logistic regression algorithm and SVM algorithm are two well-known classification algorithms but when the multi-collinearity between independent variables occurs in above two algorithms, their classifying performance will always be not good. An improved classification algorithm combining the Choquet integral with respect to the lambda-measure based on gamma-support is proposed by our previous work...
SRM is suitable to be used as drivers of electric bicycle (E-bike). A nonlinear dynamics model based on Matlab/Simulink of E-bike and four regenerative braking strategies of SRM are presented in this paper, such as most feedback power control strategy, most feedback efficiency control, fixed torque control, fixed feedback current control. A hybrid control strategy of PWM mode and current chopping...
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