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.
Many examples for the usage of electromagnetic forces in micromanipulation systems are available in the literature. The behavior of electromagnet and the dependence of their electromagnetic force on different parameters are a classical subject. In this respect, this paper presents a method to model, simulate and measure the electromagnetic force of a small electromagnet, used as actuator for compliant...
Locomotives are equipped with slip controllers to limit a value of a wheel slip velocity and conducive to reach required locomotive tractive effort. The slip control methods are developed for tenths years, and the methods are based on several principles. Progressive methods determine an adhesion-slip characteristic slope. This method requires knowledge of an adhesion coefficient value or an adhesion...
In this paper, A simple method for estimating the impedance of a human hand is proposed. In a physical human-robot interaction situation, safety is a very important issue because humans are in contact with robots. Since robots become unstable when they contact a stiff external environment or when there is a difference between human motion intention and robot motion, knowing the dynamics of a human...
This paper addresses the modeling, identification and adaptive sliding mode control for a quadrotor micro aerial vehicle. In order to obtain a compact kinematics and dynamics representation, the spatial vectors convention is used, making more efficiently the model computation by reducing the number of algebraic operations. Identification of parameters such as inertia moments, thrust and torque of...
In fully autonomous vehicles, occupants do not need to keep their eyes forward during driving and they are able to sit on any position, from a forward-facing position to a backward-facing. However, traditional passive safety systems such as seat belts, airbags, and air curtains have been developed only for the driver or passengers sitting on forward facing seats. In this paper, we propose a pre-crash...
This paper deals with the design and test of a Reluctance based Magnetic Lead Screw Power Take Off (PTO) system for a Wave Energy Converter for powering a LED light buoy. In order to meet the power requirement for the LED marking light, measurements of the seastate at the specific location of the buoy is carried out using a special wave measurement buoy. The data is used to set up a simulation model...
Fan-out wafer level packaging technology becomes more attractive and popular in the semiconductor packaging industry. The fan-out wafer level package (FOWLP) has the feature of integrating various devices in a tiny form factor. Since the FOWLP size is compact and small, its package strength is critical to its reliability. In this work, the three-point bending test method and finite element method...
This paper applies ADRC algorithm to the inverted pendulum stabilization problem. Since the extended state observer and control law can be nonlinear or linear, different combinations are designed to balance the pendulum's angle. It also offers a practical solution that the nonlinear parameters are tuned as the linear ones. The output response speed and control variable are compromised to determine...
The train velocity is needed to be known for many purposes like the train safety systems or a slip control. The train velocity is typically determined from wheelsets velocity. The wheelset velocity is different with the train velocity due to a slip velocity that is needed for a force transmission between wheels and rails. The train velocity measured by this way is the only estimation of the train...
This paper addresses the modeling and control of a quadrotor unmanned aerial vehicle (UAV) with a payload that is connected through a flexible rope. The calculation of the tension force and induced moments are derived, and position tracking and attitude control law were proposed based on some assumption. The simulation architecture was structured under the MATLAB environment, simulation results were...
A 3D-FEM model has been developed to improve the understanding of multi-parameter sensing with Bragg gratings in attached or embedded polarization maintaining fibers. The material properties of the fiber, especially Young's modulus and Poisson's ratio of the fiber's stress applying parts, are crucial for accurate simulations, but are usually not provided by the manufacturers. A methodology is presented...
Electrostatics especially electrostatic force (ESF) plays vital role in a variety of fields, concerning applications in colloid, plasma, and micro/nano device driving. The behaviors of ESF under different conditions were studied both by simulation and experiment in this paper. Voltages or charges were set to spheres of several materials, in order to explore how ESF was influenced by the electric condition...
Electric vehicles offer the capability to recover energy by electric braking and therefore to extend the range. Generally, the total demanded brake force of a vehicle is divided and allocated to the front and the rear wheels due to safety and stability issues. Consequently, common electric vehicles with only one central electric machine which drives one axle cannot exhaust the whole potential of recuperation...
Electric vehicles offer the capability to recover energy by electric braking and therefore to extend the range. Due to the dynamic axle load shift during brake applications and corresponding brake force distributions, drive train topologies with single front drive and single rear drive have different potentials with regard to recuperation. The axle load shift of a vehicle is significantly influenced...
Ships stability and safety are always threatened by the unavoidable sway in the complicated situation of the sea, e.g. strong wind and roaring waves. Ensuring the stability of the ship as a difficult task has received its popularities in the community in the past few decades. However, conventional control methods such as sliding mode control (SMC) and Proportional integral derivative (PID) fail to...
The dry calibration of Electromagnetic flow meter has wide prospect in industries. In this paper, the method of dry calibration is study by the way of simulation and numerical calculation. The ANSYS provides magnetic field distribution of flow meter. Then, after the creation of fluid simulation by FLUENT combine with the weight function, the instantaneously inducted electromotive force can finally...
A novel MEMS variable capacitor having two level suspended beams is proposed. The addition of another beam considerably extends the maximum possible displacement, which in turn increases the capacitor tuning range. The tuning was simulated using CoventorWare and found to be 670%. The achievable tuning range far exceeds that of traditional MEMS variable capacitors of the same type. The proposed MEMS...
Spatiotemporal variations of carrier density and potential in silicon-Schottky barrier diode (Si-SBD) have been simulated using a self-consistent spatially two-dimensional fluid model, based on the continuity equation and the Poisson equation. The validity of the fluid model, developed in this work, was shown because simulated surface-potential mapping was qualitatively good agreement with experimental...
The electro-mechanical model of ionic polymer-metal composite (IPMC) is presented in this paper. Applied electric field moves mobile ions inside the polymeric membrane. As a result, the electroosmotic flow inside the material appears and the subsequent motion of actuator occurs. These physical effects are modelled with the help of the finite element analysis software.
This paper presents the dynamic model and control scheme of an active variable buoyancy system (VBS) actuator for Autonomous Underwater Vehicles (AUVs). Our aim is to design an active disturbance rejection controller for the AUV maneuvering in the vertical plane with two VBS actuators. Firstly, a vertical plane mathematical model of AUV and a dynamics model of the VBS are established, and the model...
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.