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To improve the performance of the bearingless induction motor (BIM) under disturbances, a nonsingular fast terminal sliding mode control (NFTSMC) strategy is proposed. The sliding mode surface is designed as a combination of linear sliding mode and nonsingular terminal sliding mode. Besides, considering the power function of the state variables, which make the approaching speed correlate with the...
In order to solve the problem of the speed response and system buffeting for a bearingless induction motor (BIM), which is subjected to various interferences and uncertainties, as well as the worse convergence performance of linear sliding mode and the singularity of terminal sliding mode, a nonsingular fast terminal sliding mode control strategy is proposed. Taking the power function of system state...
A hybrid controller is proposed by combining the PID controller and model reference adaptive controller (MRAC), and the convergence performance of PID controller, model reference adaptive controller, and PID+MRAC hybrid controller are also compared. The results show that the convergence speed and performance for MRAC controller and PID+ MRAC controller is better than that of PID controller. Whereas...
This paper presents two enhancements for improving the convergence behavior of bit-interleaved coded modulation iterative decoding (BICM-ID) in multiple-input multiple-output (MIMO) systems. As typical tree search based MIMO demapping algorithms for BICM-ID are based on the suboptimal Max-Log-MAP (maximum a-posteriori) criterion, the first enhancement aims at correcting the outputs of such MIMO demappers...
In this paper, the iterative scheduling issue for multiple-input multiple-output (MIMO) systems with turbo codes is addressed based on the informed asynchronous scheduling, initially used for scheduling low-density parity-check (LDPC) decoding. For the iterative MIMO demapping and turbo decoding, the convergence behavior by using the informed asynchronous scheduling is first demonstrated to be similar...
We discussed the Fourier series expansion method combined with complex coordinate stretching layers, and studied the details of the parameter in the complex coordinate stretching layers, when it was used in a two-dimensional optical grating waveguides. The numerical examples show that the method has shown some special features by using it in optical grating problems. We proposed a new formula for...
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