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Simulation of a permanent magnet synchronous motor (PMSM) servo system which was based on active disturbance rejection controller (ADRC) was presented in this paper. A new Monte-Carlo method for parameter tuning was invented, which was based on different parameter values and their corresponding dynamic performance. What's more, according to the simulation results of the servo system, the ADRC controller...
Sparse subspace learning has been demonstrated to be effective in data mining and machine learning. In this paper, we cast the unsupervised feature selection scenario as a matrix factorization problem from the view of sparse subspace learning. By minimizing the reconstruction residual, the learned feature weight matrix with the l2,1-norm and the non-negative constraints not only removes the irrelevant...
The image's histogram represents the statistical feature of distribution of pixels and is not related to the specific positions of pixels. This feature gives histogram-based algorithms the ability to resist geometric attacks, but the embedding capacity is limited. In this paper we combine two typical histogram-based functions and give two relationships to three bins in a group. So the embedding capacity...
The image's histogram use the statistical features of an image and is regardless of the specific distribution of image pixels. With this feature, the histogram-based image watermark algorithm can avoid the desynchronization that geometric attacks bring to image and is robust to geometric attacks. Typical histogram algorithms can resist translation and crop attacks, but the ability to resist rotation,...
The real-time compressive tracking algorithm, proposed by Kaihua Zhang etc. In 2012, is real-time and robust. But this algorithm may lead to object tracking losing in some complex environments, such as pose variation, illumination change, occlusion, and motion blur etc. This paper improves the compressive tracking algorithm in two aspects: (1) we propose a self-adaptive method for learning parameter...
A distributed fuzzy logic controller structure is designed for the single-link flexible manipulator in the paper, Loading to simulated experimental results that show the single-link flexible manipulator has better controlling-presition, lesser vibration at the tip position and faster response.
A Six Degrees of Freedom(Six-DoF) reentry vehicle model is being developed for control studies. This vehicle model is highly nonlinear, multivariable, unstable and coupling and includes uncertain parameters. The dynamic inverse method and sliding mode control are used in inner-loop and outer-loop for the reentry vehicle control respectively according to the dynamic equations. When dynamic inversion...
In order to improve the robustness and invisibility of the image hiding algorithm based on wavelet transform, an image hiding algorithm is proposed based on the combination of Cellular Neural Network (CNN) and wavelet transform. First, the high bit planes of the secret image are encrypted by CNN encryption, and then the encrypted bit planes are hided into the singular value matrices of the wavelet...
As an effective technique for combating multipath fading and for high-bit-rate transmission over wireless channels, orthogonal frequency division multiplexing (OFDM) is extensively used in modern digital television terrestrial broadcasting (DTTB) systems to support high performance bandwidth-efficient multimedia services. In practical DTTB system, there always exists phase noise caused by the fluctuation...
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