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In the field of control, observing the nonlinear system state and unknown input have always occupied a very important position. A class of unknown input observer presented in this paper is using the nonsingular terminal sliding mode method which not only improves the accuracy of observer, but also can converges the error to zero in finite time. With the stronger robustness of the system, the sliding...
The disadvantage that ordinary active suspension model is in low accuracy and practicability which is caused by the neglect of actuator motion is brought forth through analyzing the assemble of active suspension. The model including hydraulic system parameters is obtained through building the active suspension hydraulic system model. The weighting coefficient matrix of car body acceleration, suspension...
Efficient coverage and energy conservation are two of the primary concerns for area coverage applications of randomly deployed wireless sensor networks. This paper developed a distributed algorithm using range adjustable sensors for maintaining the full coverage of such sensor networks. The algorithm contains two major parts: the first part aims at providing 100% coverage and the second part aims...
This paper presents an efficient MPPT controller. Incremental conductance algorithm is chosen for MPPT to improve the efficiency. The advantage of this algorithm is that the operating point does not oscillate around the Maximum Power Point. The algorithm also detects the atmospheric conditions. The operating point gets shifted according to the irradiance. The DC-DC converter chosen is a MOSFET based...
In this paper, a new integrated weight particle filter (IWPF) algorithm is proposed based on the combination of correlation particle estimation (CPE) weight and sequential importance re-sampling (SIR) weight. This method can reduce degeneracy phenomenon and re-sampling times of traditional particle filter. By choosing the typical nonlinear system model, the simulation results show that IWPF performs...
Squatting down and lifting object for biped robot is one of the basic conditions of realizing the humanoid movement. This paper analyzes the movement through the linkage mechanism. The motion rule of the whole body's 15 degrees of freedom (DOF) is the most important part. This paper calculates the necessary conditions to make the robot keep balance and not tip over in the process of squatting down...
This paper aims to design efficient and effective approaches to virtual network embedding (VNE) problem, which deals with the embedding of a requested virtual network (VN) in an underlying physical (substrate network) infrastructure. When the node and link constraints (including CPU, memory, network bandwidth, and network delay) are both taken into account, the VN embedding problem is NP-hard, even...
In order to generate more rational and more diversified natural cloud scene, the improved random midpoint displacement method is proposed in this paper. We find that the cloud scenes generated by the traditional random midpoint displacement method are simple and similar through simulation analysis. The limitation of the traditional random midpoint displacement method is caused by unreasonable method...
This paper includes a different approach to analyze the turn-to-turn fault in stator winding of 3phase Permanent Magnet Synchronous Generator. For better life cycle of PMSG it is very much needed to understand the abnormal behavior for earlier protection. Using Winding Function Approach, the abnormal behavior of shorted stator phase current, fault current and change of values of machine parameters...
This paper proposed an improved single diode photovoltaic module model over the Rp-model (single-diode, five parameter model) based on datasheet values. Rp-model is widely in use being a compromise among other diode models in simplicity and accuracy. However, the model has major drawback at low irradiance level that is deviation from experimental data in the vicinity of open circuit voltage. And this...
Tunable laser system requires high resolution and accuracy in position of the wave selective optical element, which can be attained through the use of stepper motor. This paper focuses on the stepper motor controller, with the feedback to improve the accuracy and the microstepping technique to improve the resolution. Sine cosine and trapezoidal current controlling techniques for the micro stepping...
This paper describes how to construct the whole body movements model of Japanese Radio Calisthenics, that is able to calculate the joint positions of a body from the less parameters. In order to get the actual data for building the movement model, we did experiments using the optical motion capture system in a three dimensional space. From the data, we presented equations that are able to estimate...
This paper proposes novel circuit model to simulate photovoltaic (PV) modules at different temperatures. The basic component of the new model is the N-channel enhancement mode MOSFET. The new approach simplifies the I-V output equation of PV module by avoiding the exponential term in the well-known diode models. In addition, it provides the ability to represent the whole PV module by only one MOSFET...
In optical systems, the energies are very low if the photo source is divided through polarization beam splitters. Most of the energies are submerged in the noise and the useful signal is even weaker than the noise. Therefore we must detect the weak useful signal from the strong noise in order to better understand the radiant features of weak signals. Nowadays, there are a lot of methods to be used...
This paper presents an electronically tunable biquadratic filter and a third order quadrature oscillator using current controlled differential voltage current conveyors and grounded capacitors. The proposed circuits are electronically tunable versions of recent analog functions and use only grounded capacitors, thus making them integrable. The PSPICE simulation results, using the TSMC MOSIS 0.25μm...
In this paper we present a method for the detection of wrong feature correspondences in a local feature based object detection system. Common visual objects in different images share not only similar local features but also a similar spatial layout of their features. We will utilize this fact in order to distinguish between correct and wrong feature correspondences. The spatial feature layout will...
This paper deals with the effect of laminations on natural frequencies of asynchronous machine magnetic core. Measurement of natural frequency of stator core is presented. Numerical model and calculation of natural frequency of core is described in next part. Comparison of measurement and mathematical model is discussed.
This paper presents an iron loss calculation by incorporating the Landau-Lifshitz-Gilbert (LLG) equation into a magnetic circuit model. In the proposed model, dc hysteresis loss is calculated by the LLG equation, and eddy current loss is calculated by a magnetic inductance. The validity is proved by comparing with the catalog values.
This paper presents a cell-level simulation model of photovoltaic (PV) systems that is capable of reproducing partial-shading and other mismatch effects at high granularity. The nonlinear diode voltage-current characteristic is stored in a piecewise-linear model, and the stored values are employed to compute the Jacobian matrices very efficiently. As a result, the model can be solved with low computational...
Recently, several new families of switched capacitor converters (SCCs) have been proposed using algebraic methods to generate switching states. Because of their regular structure, the switching states may be translated directly into matrices that may be used to compute performance via statespace analysis. This paper provides an algorithm for creating the matrices. Simulated results are given for three...
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