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The intelligibility, the definition and the Comfort for digital hearing aids were reduced because of distorting formant of speech resulted by the existing loudness compensation method(LCM). In order to solve these problems, a LCM based on human auditory is proposed in this paper. This method adopts gammatone filter banks which can simulate the auditory model of human ear cochlea. Input signal is divided...
Based on the ship vibration motion characteristics, in this paper, it has put forward a new kind of 3 rotations and 2 translations five degrees of freedom parallel mechanism, the 4-CPS/RPS, which suites for shipboard active vibration isolation. The inverse kinematic solution of the 4-CPS/RPS is obtained, the dynamics model is established by using Lagrange method; Then the wave model and ship motion...
With the further research of nonlinear systems, we have discovered that many practical physical circuits contain chaotic phenomenon. At the same time, a number of control schemes can be used to controlled chaotic system, such as control by Ott-Grebogi-Yorke (OGY) method, control by delayed feedback control (DFC) method, control by synchronization and so on. Delayed feedback control was proposed by...
In this paper the fluent software was used to solve the stability of ducted fan UAV problems. The researchers calculated, programming, before and after repeated treatment and so on inputs, inefficient labor was reduced. More energy and time was considered into the nature of the problem, optimization algorithm selection and parameter setting, so the work efficiency was improved. The pneumatic parameter...
A simple digital background-calibration technique is proposed for a pipelined analog-to-digital converter (ADC). Both gain error and DAC error are measured and calibrated by injecting two uncorrelated pseudo-random sequences into the MDAC. With this method, not only small capacitors might be used, leading to small chip size, but also the traditional current starving high gain op-amps of pipelined...
Power flow transfer is one of main causes of cascading failures. It is important to evaluate power flow transfer phenomenon from the perspective of cascading failure. The authors propose a set of evaluation indexes based on the structure and operating features of the power networks and the consequence of power flow transfer. On this basis, the authors propose a comprehensive evaluation method which...
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...
Monte Carlo Method has been proven very successful for non-linear and non-Gaussian estimation problems. However, a Monte Carlo filter usually has a lot of samples, which increase the computational load greatly. This paper presents threshold constraint into Monte Carlo. The target model is defined by the color information of the tracked object. Use the Bhattacharyya coefficient to get the similarity...
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