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For simulations of multiple-input multiple-output (MIMO) narrowband channel between the Unmanned Aerial Vehicle (UAV) and the ground user, we describe the distribution of scatterers by using a cylindrical model, and propose a corresponding deterministic simulation model and a statistical simulation model. In order to verify the practicability of the simulation model, this paper compares the temporal...
Aiming at the problem of vibration detection in the factory production line, a dynamic angular displacement detection method based on laser displacement sensor is proposed. This article takes the air conditioner as an example. The dynamic angular displacement detection method is used to detect the dynamic angular displacement of a certain point of the air conditioning external unit. The results show...
Motivated by the concept of spatial modulation (SM), a differential scheme has been recently proposed. This scheme, termed as differential (D-)SM, dispenses with channel estimation while maintains a similar bit error rate (BER) performance to SM. The conventional optimal DSM detector based on a maximum likelihood (ML) criterion, however, gives rise to prohibitive computational complexity when either...
This work describes a novel modeling and simulation approach of brushless DC motor control system depended on analysis of it's mathematical model. The brushless DC motor ontology model, the voltage type inverter circuit model, the hysteresis current tracking comparative model and the PID speed controller model were constructed in the Simulink environment of Matlab. S-function was used in modeling...
A novel multi-branch induction motor (MBIM) applied in low-voltage high-power drive system is presented for the purpose of improving the performance of conventional high-power induction motor drive system. Multi-branch of the MBIM could be fed by multi-converter, the keys are to utilize its multi-branch to disperse the larger current produced by low-voltage high-power and to control the number of...
In this paper, based on the tapped delay line (TDL) structure, we propose a geometry-based stochastic model (GBSM) for wideband multiple-input multiple-output (MIMO) mobile-to-mobile (M2M) Ricean fading channels. The proposed wideband model is the first GBSM that has the ability to study the impact of the vehicular traffic density (VTD) on channel statistics for different time delays, i.e., for every...
The paper studies sliding mode variable structure control system for a novel gearless windlass balance oil pumping unit (GWBOPU) driven by low-speed and high-torque permanent magnet synchronous motor (PMSM). By analyzing the correlative relationships of the motor and the load, a mathematics model for GWBOPU is established. Base on this model, a speed sliding mode controller is designed by regarding...
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