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In this paper, a low-power four-quadrant current multiplier based on the electronically and linearly tunable CMOS transconductors (EOTAs) is presented. The design technique is realized by using only two EOTAs as active circuit elements. The proposed current multiplier can operate for four quadrants with wide input dynamic range. The performances of the proposed current multiplier are tested on PSPICE...
There are some shortcomings in the delay tolerant network (DTN) routing algorithm, such as low message delivery rate, low network efficiency and high cost in the satellite network. In order to solve the problem above, this paper proposes a limited copy algorithm MPWLC based on service probability. In MPWLC, not only is the number of copies limited, but the storage resources of the satellite are also...
Thermoelectric generators (TEGs) are used for the direct conversion of heat energy into electricity. Given that there is an extreme concentration of heat present on house roofs, the application of TEGs on these locations is feasible. This study involves the modeling of thermoelectric generators on house roofs through the use of simulations and an actual prototype. Simulations were done using the matrix...
This paper proposed a physical model of electron trapping/detrapping in electrically stressed oxide. The new model is based on both inelastic multi-phonon trap-assisted tunneling and thermal emission, and the capture effect of oxide bulk traps is considered as well. The dynamic procedure of traps capture and emission of electrons are established. Finally, the filling state of all the oxide traps at...
This research considering one working partition of order picking system as the research object, studies order batching problem and builds order batching model of fixed maximum order number. To solve the order batching model, the storage location similarity coefficient is token as clustering index, at the same time clustering algorithm is designed. This paper explores the application analysis of the...
This paper presents a hybrid control which includes swing-up and balancing control for pendubot system - a two-link under-actuated robot. The parameters of the pendubot system are measured in the actual pendubot system built in the automation lab, University of Technology and Education HCM City. A hybrid controller which drives the system close to the equilibrium manifold and maintains the system...
This paper develops a hierarchical sliding-mode controller (HSMC) to simultaneously accomplish velocity control and balancing control for a two-wheeled self-balancing vehicle (TWSBV). Based on the derived TWSBV model, two first-level sliding surfaces, relevant to velocity and position of TWSBV and tilt angle and tilt angular velocity of TWSBV respectively, and a second-level sliding surface, are defined...
We propose bias-compensated algorithms based on the RZA-LMS algorithm and diffusion RZA-LMS algorithm. Our proposed algorithms improve the accuracy of estimation under the situation that input of the adaptive filter contains noise. Estimation methods of the input noise' variance are given for implementing our single-node and diffusion bias-compensated algorithms. Simulation results show that the proposed...
Shell structure can help us understand the transport properties of the network clearly, and also identify the influential spreaders in complex networks. The robustness of networks suffering shell attacks is a topic of great interest since it is an important issue affecting many real-world networks. We study the robustness of two coupled network systems under shell attack, where multiple support-dependence...
Simulation has been used for decades as a tool to support decision making in manufacturing systems. It is far cheaper and faster to build a virtual system and experiment with different scenarios and decisions before actually implementing the system. Simulation has been widely used to support decisions in manufacturing systems' operations and configuration. Nevertheless, knowing the changeable nature...
There are many software-based tools that can be used to evaluate the radio-ecological impacts. Plume Gaussian is a simple dispersion model, easy to be implemented and developed further. This paper describes the application of Plume Gaussian model to simulate the dispersion of I-131 released around the Serpong Nuclear Area (Kawasan Nuklir Serpong, KNS). The software development consists: mathematical...
Airborne Single Observer Passive Location has the characteristics of mobility and a wide range impaction, while location method basing on phase difference change rate also has the characteristics of getting a quick location with high precision. Studying the Kalman Filter (KF) applied in Airborne Single Observer Passive Location, it analyzes the principle of the position method basing on phase difference...
Aiming at analyzing the vibration and the vibration inconsistent of CMS04 Maglev in guideway step disturbance during the running in Tangshan test line, this article builds the suspension model of double point in one bogie and analyzes its open-loop instability in theory. Gap-current double loops cascade control strategy is also used to simulate and analyze the dynamic process of model passing guideway...
Weapon-target assignment process with uncertainty and unpredictability, sometimes need to be aborted, and then distribute the firepower units immediately when there are many new targets or an emergency. The assignment results may not be the global optimal, but should be the best under the influence of the current state, that is, the algorithm has anytime property. Now the algorithm to solve the question...
In order to reduce the initial disturbance and improve the stability of air defense missile, the missile launching equations of motion are derived and simplified using the method of modal substitution. Based on these equations, the coupled rigid-flexible dynamic modeling is built in the ADAMS software to analyze the dynamic behavior and stability of missile launching process. The results indicate...
This paper studies the modeling and control of a quadrotor with a suspended load. It is shown that the excessive load swing is the part of the system dynamics, which may degrade the quadrotor control performance. A detailed analysis about the system modeling with the load swing effect is carried out based on Newton-Euler and Euler-Lagrange method. A framework for sliding mode control of the quadrotor...
This paper investigates the finite-time output feedback control problem for DC-DC buck converter systems. By using the techniques of finite-time controller and finite-time convergent observer, a new fast voltage regulation control algorithm is designed which can guarantee that the output voltage converges to the reference voltage in the finite time. An inductive current convergent observers has been...
The control of multiple homonuclear spin systems is a long-standing problem in nuclear magnetic resonance (NMR). In this paper, we introduce the brachistchrone algorithm to local unitary control of such systems, which usually take a long operation time to discriminate because of their small resonant frequency differences. We show that for this particular problem the model can be reduced from 2N-dimensional...
The underactuation of the standard quadrotor(four independent control input versus six output) is a serious problem which can be solved by tilting four rotors. The steering wheel is installed on each axle of the original quadrotor so that the quadrotor turns into an actuation system(eight-input versus six-output). In this paper, the dynamic model of the tilt-quadrotor is established, and the validity...
Body weight support (BWS) system is increasingly used in conjunction with treadmills to assist the patients with neurological impairments. Owing to lower limbs of the patients unable to bear the whole weight during the rehabilitation training, some weight can be removed to help the patients recover the basic walking ability gradually. Therefore, considering the man-machine relationship and the effects...
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