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This paper proposes a system that can actuate itself with wirelessly received power. The system consists of two coils with different purposes; the power-receiving coil wirelessly receives power from the external sinusoidal magnetic field, and the actuation coil controls the current for 1D self-actuation. The actuation current has a square waveform and is controlled to be in phase with the external...
Today, with the development of technology, communication tools like computers, phones, tablets and etc. use the http as default protocol. The fact that large data stream transactions are over the http protocol has caused this protocol to become a target for attackers. It is important to analyse HTTP traffic for attack prevention systems and to detect attack attempts. Signature based, anomaly based...
In this paper we describe how to use a Game-Based Learning (GBL) approach to help end-user programmers to develop Computational Thinking (CT) skills. CT represents a framework consisting of a set of skills such as: abstraction, decomposition and more in general problem solving expressed in a computational form (algorithmic thinking) that can be easily formalised into a computer program. Those skills...
This paper provides the comparative analysis of coreless-type permanent magnet linear synchronous machines (PMLSM) with non-overlapping windings. The comparative study is carried out on the basis of conductor winding factor. In order to aid the comparison, the new factor called thrust factor is introduced to denote the best Spp family depending on the variation of coil width ratio. From the extensive...
This paper presents a novel tubular flux-reversal transverse flux permanent magnet linear machine (FR-TFPMLM), in which both magnet and armature winding are located at the short primary side whereas the secondary side is composed of only magnetic steel. This configuration is typically used in long stroke applications to save magnet material. With different configurations of phase winding, the machine...
A comparison of noise reduction currents in 36-24 and 18-12 switched reluctance motors in all operating region is presented. Radial force profile in these two machines are compared. It is seen that the difference in radial force profile causes different optimized current to reduce the noise in switched reluctance motor. Analysis, simulation, and experimental results are presented to verify the proposed...
Needle-free jet injection allows delivery of liquid drugs through the skin in the form of a narrow fluid jet traveling at high speed, minimizing the risk of accidents. The use of a controllable actuator to drive this process has many advantages, but the voice coil actuators previously used are too large and heavy for practical use with common injection volumes (∼1 mL). We instead propose a compact...
Automation systems, as well as process control, has played a key role in the industry nowadays. For good system performance, it is necessary that mathematical model is closest to the real model, which is detailed in this work. The objective of this study is to present a modeling (considering the viscous friction), stability analysis and simple PID controller tuning using as an example, an arm with...
This paper presents the design, construction, and testing of a double-sided, dual airgap linear Vernier generator for wave energy conversion. Both the electromagnetic as well as mechanical design concepts are explored with a particular emphasis on the mechanical aspect given the fact that maintaining a dual airgap for this topology is challenging and has not been previously implemented.
This paper describes a simple ripple compensation method of suspension force and torque in a bearingless surface-mounted permanent magnet (SPM) motor with two-phase integrated winding configuration. Only two H-bridges or eight power transistors are used for the proposed topology. The neutral point of each phase is connected to the middle point of the power sources to superimpose the suspension and...
In this paper we present the modeling and simulation of multi-rotors using Spatial Operator Algebra. We develop two dynamic models one where the speeds are in the inertial frame and another where the speeds are vehicle frame. In both the reference point is the center of mass, but the method applies to any point of the vehicle. Besides gravity, the external forces considered include the effect of the...
In this paper, the effect of the acting electrode position on the dynamic behavior of a polysilicon microcantilever is investigated by considering different oscillating modes. The oscillation of structures in higher bending modes is used to increase the quality factor and to decrease the loss of energy during oscillation. The tests are performed in ambient conditions as well as in vacuum. The position...
The novel doubly salient slot permanent magnet linear machines (DSSPMLMs) are proposed in this paper. First, the topology and geometric parameters of the DSSPMLMs with 12 slots are introduced, and the corresponding basic operating principle is investigated. Then, feasible slot/pole combinations and winding configurations are further analyzed. To the DSSPMLMs with 12 slots, all structures with 10/11/13/14...
This paper reports on three measurement science field exercises for evaluating ground, aerial, and aquatic robots. These events, conducted from February to June 2017, were conducted in close co-ordination with the responder community, standards organizations, manufacturers, and academia. Test data from a wide variety of robot platforms were gathered in a wide variety of standard and prototypical test...
This paper proposes a new family of electric motors based on the concept of an airgap-less device with an internal rotor. The internal flux and therefore electromagnetic torque is maximized because the rotor is allowed to touch the stator. The proposed family of motors are competitive in applications where hydraulic motors are prevalent, i.e., low-speed and high-torque requirements. Furthermore, the...
Permanent magnet Vernier (PMV) machines have attracted more and more attention for their merits of high torque density and simple structure. And principle of electromechanical energy conversion is the most common way to investigate the PMV machine by calculating back EMF and electromagnetic torque. In this paper, a new perspective on the mechanism of PMV machines based on the Maxwell stress tensor...
Linear Electric Submersible Pump is a new industrial solution in artificial lift applications. Linear motors are placed downhole to drive the reciprocating pump directly. This system is intended to overcome some of the sucker rod pump limitations. The new configuration will allow implementation in deviated and off-shore oil wells. Integrated Drive-Motor technology shows many promising advantages....
The aim of this study is to compare the successes of various distance metrics and to determine the most appropriate methods in order to detect similarities among textual documents written in Turkish. Computing similarities between text documents is the basic step of plagiarism detection, and text mining methods like author detection, text classification and clustering. Therefore, plagiarism detection...
Kinematic models for skid-steer vehicles based on the locations of instantaneous centers of rotation (ICRs) of treads have been useful for motion control and dead reckoning. These models have typically assumed constant track ICRs because actual ICRs remain in bounded regions. However, this assumption neglects tread ICR variations during motion caused by dynamics. This paper analyzes the effect of...
This paper investigates the influence of converter-fed operation on magnetic forces and radial vibration in a hydrogenerator. Flux density distribution is computed using time-stepping finite element (FE) analysis and used to calculate force density distribution based on Maxwell stress tensor. Both temporal and spatial characteristics of selected flux density and force density waves are studied. Important...
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