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Health-conscious battery management is one of the main facilitators for widespread commercialization of Li-ion batteries as the primary power source in electrified transportation and portable electronics and as the backup source in stationary energy storage systems. The majority of the existing Battery Management Systems (BMSs) define battery State of Health (SOH) in terms of internal resistance increase...
In the actual operation, the stator magnetic slot wedge is vibrated by the large alternating electromagnetic force, which causes the stator magnetic slot wedge to defect and then affect the starting performance and efficiency of motor.
In this paper, two control strategies are developed to control the piezoelectric inertia-friction actuator (PIFA) systems with a great attention to counter for the thermal effect. The first strategy is to use two controllers: one is the main controller (used to control the actuation) and the other is the auxiliary controller to adjust the contact pressure (used to compensate the thermal effect). The...
Subdivision surfaces are a powerful geometrical modeling tool that has been used extensively in computer graphics. In this paper we develop a general subdivision-based basis scheme that can be applied to a wide range of electromagnetic integral equations, and demonstrate several features and advantages.
Electromagnetic limited-angle torque motors (LATMs) which have a limited angular movement less than 180 degrees are widely applied in industry, particularly for positioning tasks. Compared with common rotating motors, LATMs have many advantages such as simple structure, high reliability, and uncomplicated control mode. In general, radial-flux permanent-magnet LATMs have two conventional types which...
Deep inside the ocean, the earth magnetic signal is one of the merely existing information that tells the heading of robots with very good cost efficiency. Therefore, this paper focuses on the AUV (Autonomous Underwater Vehicle) heading control problem using only one magnetic compass as feedback sensor. In this application, we address AUV modeling and control issues simultaneously. Because of quadratic...
As wind turbines increase their power rating, the size and mass grows as well. The higher reliability is demanded in order to minimize the maintenance. Permanent magnet direct drive (PMDD) synchronous generators are a good solution since they omit the gearbox. While the large generator mass has been also a key difficult problem limiting the practical use of PMDD generator, which makes them difficult...
Hypertension has its contribution from atherosclerosis or metabolic factors. It is commonly diagnosed with a sphygmomanometer (blood pressure cuff) which only outputs systolic (Ps) and diastolic (Pd) pressures. Hypertensive patients are then administered oral medication whose effect on arterial compliance (C), an index of vascular stiffness, cannot be accurately determined merely from Ps and Pd values...
Distributed diesel generation is still widely used to supply electric power in a variety of applications. These applications range from backup power supply systems and combined wind-diesel generation to providing power in places where grid connection is either technically impractical or financially uneconomic. Due to the ever increasing cost of diesel fuel and the environmental issues associated with...
This paper addresses the problem of investigating stochastic stability of uncertain genetic networks with SUM regulatory functions. Specifically, the genetic network is assumed to be affected by Wiener processes, and its coefficients are parametrized by an unknown vector constrained in a hypercube. By using the square matricial representation (SMR) of matrix polynomials, it is shown that a condition...
This paper examines the fault diagnosis (including detection and localization) of a Flux Switching permanent magnet Motor (FSM). Electrical and mechanical models of fault due to a partial short-circuit on one phase is described and used on a numerical simulation in order to detect and localize the fault. Fault detection is realized by a diagnostic observer (Kalman filter) which generates residual...
A steady-state dynamic model for a cable in air is put forward by using some tensor relations. For the dynamic motion of a long-span Cable Driven Parallel Robot (CDPR) system, a driven cable deployment and retrieval mathematical model of CDPR is developed by employing lumped mass method. The boundary condition of cable and initial values of equations is founded, The partial differential governing...
The failure mechanism of lead-free solder interconnections under thermal cycling has been studied by cross-polarized light microscopy, scanning electronic microscopy (SEM), and nanoindentation test. From the results of finite element modeling (FEM), it was found that the critical solder interconnection was located at the chip corner, and the stress was concentrated at the outer neck region beneath...
To investigate complex electrophysiological behaviour (such as reentrant cardiac arrhythmias) in the setting of the complex anatomy of the heart, the use of a simplified model is computationally more effective. In this study, the Rogers-modified FitzHugh-Nagumo model was further modified to allow control of action potential upstroke velocity, conduction velocity, action potential duration and refractory...
The effects of wave reflection alone on aortic pressure and flow were studied using an arterial system model coupled to a time-varying compliance model of the left ventricle. A reflectionless system was obtained while retaining the dc characteristics of the system. This allowed for the qualitative study of the effects of wave reflections on aortic pressure and flow. We find that in a system with reflections,...
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