The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The dynamics of the aortic valve plays a critical role in the understanding of heart failure and its treatment using the continuous flow left ventricular assist device (LVAD). Maintaining proper and active dynamics of the aortic valve is important when the LVAD is used as a bridge-to-recovery treatment. This treatment requires that the LVAD pump control must be adjusted so that a proper balance between...
This paper investigates the problem of relative control for spacecraft formation flying on an arbitrary elliptical orbit. The nonlinear dynamic model describing the relative motion between the leader spacecraft and the follower spacecraft is established in the presence of system model uncertainty and external disturbance. A continuous finite-time control scheme is designed by using a new form of terminal...
This paper presents a 10-bit Successive Approximation Register (SAR) Analog to Digital Converter (ADC) with 60.9 dB SNDR at 50MS/s while with 41.3uW power consumption. Several techniques were used to decrease the power consumption. First, Segmented architecture was used to decrease the total number of capacitance. Aligned switching with skip (ASS) method was used during copy MSB bits from coarse to...
The rotary Left Ventricular Assist Device (LVAD) has largely been used as a destination therapy device for patients with congestive heart failure who are awaiting heart transplantation. In recent years, however, the device has also been used as a bridge to recovery device for patients whose heart condition might recover as a result of the LVAD support. In this latter case, the aortic valve dynamics...
The paper investigates a path planning and following algorithm of observing targets for an underwater vehicle-manipulator system(UVMS). The algorithm including the operational task assignment and path following for the UVMS is proposed. The operational task assignment consists of path planning and task assignment. Path planning provides planned trajectory distance between any two targets for task...
The traffic jam of urban road is one of the important issues of common concern to the international community, which affects the efficiency and quality of city life. In order to solve the urban road traffic congestion problem, this paper gathers information and data about a five forks by the Work Sampling and image analysis method. Then, according to the queuing model of M/M/1, these parameters as...
The aerodynamics characteristics of square Mira model were researched by simulation and wind tunnel test. The velocity distribution, pressure distribution, drag coefficient and the aerodynamic characteristics around model were achieved. With contras the results of simulation and wind tunnel test, it validated the veracity of simulation. Based on results, the back spoiler was added and the fixing angle...
When the master-slave strategy is employed for the DC bus voltage control of a DC micro-grid, the voltage is determined by the constant DC voltage control converter. The DC voltage will be unstable when the active power is unbalance or the constant DC voltage control terminal is tripped off against faults. At this scenario, the DC voltage must be controlled through the coordinating control of the...
We propose a distributed algorithm for controlling traffic signals. Our algorithm is adapted from backpressure routing, which has been mainly applied to communication and power networks. We formally prove that our algorithm ensures global optimality as it leads to maximum network throughput even though the controller is constructed and implemented in a completely distributed manner. Simulation results...
A new feedback control system for a current-based model of the combined cardiovascular system and a rotary left ventricular assist device is presented. The system consists of a suction detection subsystem and a feedback controller subsystem. The suction detection subsystem is based on a Lagrangian Support Vector Machine model. In the absence of suction in the left ventricle, as indicated by the suction...
Roll-to-Roll (R2R) processing is a complex production system which involves discrete and continuous processes. Raw materials, in the form of rolls of functional film, go through their own unique routes of different process machines. This complexity makes it difficult to estimate and measure production performances and how well the performances will be a vital factor to determine the adoption of the...
Recently, robust transmit beamforming has drawn considerable attention because it can provide guaranteed receiver performance in the presence of channel state information (CSI) errors. Assuming complex Gaussian distributed CSI errors, this paper investigates the robust beamforming design problem that minimizes the transmission power subject to probabilistic signal-to-interference-plus-noise ratio...
Centrifugal compressor is the vital part of many mechanical systems. The present paper deals with the simulation and the analysis of the fluid performance in two subsonic compressor stages under different rotational speed. The configurations used for the study is two subsonic centrifugal compressors with 60mm and 70mm diameter impeller wheels respectively. Numerical simulation is carried out with...
The hybrid electrical vehicle (HEV) has draw researchers' attention recently. This paper mainly discusses the control strategy of HEV based on fuzzy logic. By using this control strategy, the work space and work efficiency of engine are optimized, which play a vital role on improvement of the operation performance of HEV. Meanwhile, the strategy has been applied to optimize the power balance of battery,...
We investigate the extraordinary optical transmission of a subwavelength elliptic hole array in a metal by a proposed simple method. The transmission strength depends on the polarization direction of the incident light. The polarization excitation ratio of the surface plasmon polariton (SPP) governs the transmissivity. There is an interplay between the adjacent holes which is caused by the transverse...
Belt simulation is the key point of virtual prototyping (VP) technology for belt conveyor. ADAMS can carry on the simple conveyor belt simulation. For its low precision and heavy work, ADAMS is not suitable for belt conveyer VP modeling and simulation. A new simulation method based on RecurDyn is introduced in this paper. The conveyor belt is divided into finite discrete micro belt segments. With...
This paper first introduces the topology of three-phase PWM voltage source rectifier (VSR). Then the mathematical models in three-phase static and two-phase rotary coordinate system are built. Based on that theory and the voltage-oriented vector control's idea, the paper introduces a dual-channel closed-loop control strategy with current-inner-loop and voltage-outer-loop. Active power channel is aim...
A compact FSS (frequency selective surface) filter will be designed in this paper. The length of the filter is reduced by the use of both bandpass and bandstop FSSs. A sample filter at 8.05 GHz will be designed using CST Studio as an example. Simulation results show that the FSS filter has a bandwidth of 800 MHz and a reflection lower than -20 dB. Tested results from this sample filter agree well...
The localization algorithm in wireless sensor network is always a hot spot. Information collected by the sensors is meaningless without the position of the sensors. Now, paying little attention to 3-D space, most of the algorithms are for 2-D space. In this paper we introduce a novel algorithm for 3-D space called OBS (Optimal Beacon Selection) algorithm. In this algorithm we launched the concept...
A new low-voltage single-power high CMRR and PSRR instrumentation amplifier is developed for biomedical applications. The proposed circuit uses a new structure to solve the conventional circuitspsila problems. Under similar conditions for comparison, the simulation results show the proposed circuits have better performances than conventional circuits. Besides, we also present a level shifting circuit...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.