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 development and the test of a palm size finless torpedo shaped micro autonomous underwater vehicle (AUV) named Lancelet are presented. The vehicle has a diameter of 60 mm and only weighs 570 g. It has no appendages such as rudders, elevators, external propellers or other unprotected moving surfaces, which might increase the drag of the vehicle and interfere with the underwater obstacles. A novel...
This paper aims to realize sensorless motion transmission for haptic teleoperation between remote places. Sensorless systems are endurable against operations under harsh environments. This is a great advantage suitable for teleoperation systems. To achieve this purpose, two types of voltage compensation are proposed for torque transmission and velocity synchronization. These two targets are known...
In this paper, a novel hybrid DTC scheme is proposed for asymmetric six-phase PMSM drives, which can achieve faster dynamic response of classical ST-DTC scheme and good steady-state performance of classical SVM-DTC scheme. The key is that a completely novel control strategy for torque and stator flux is designed. Different torque control methods are adopted under dynamic mode and steady-state mode...
This paper proposes a capacitor-less inverter for AC motor driving system. The proposed converter consists of a single-phase diode rectifier, a small film capacitor at the DC bus, a three-phase voltage-source inverter, and a permanent magnet synchronous motor (PMSM). Since the DC bus capacitor is quite small, the input current of the AC source will be affected directly by the three-phase inverter...
Permanent magnet synchronous motor with its high torque density, high efficiency and high reliability, has become the mainstream of the drive system for electric vehicles, elevators, etc. The existing method of fault diagnosis based on the motor model has not considered the fractional characteristics of motor. it is difficult to effectively diagnose minor faults of the current. With the permanent...
Welding is an important operation in manufacturing processes and it can represent a highly relevant amount of production costs, depending on material workpieces and required weld quantity. In mechanised and robotised welding processes, robot's travel velocity is an important parameter, which requires a proper regulation to obtain a good quality for weld beam. Then, in this work, a nonlinear model...
Implementation of a Fuzzy Logic speed controller for a Permanent Magnet DC (PMDC) motor using a low-cost Arduino interfaced with a standard xPC Target MATLAB environment is demonstrated. The Arduino solution is acceptable at kHz sampling frequencies. The study of speed control of PMDC motor based on Arduino and L298N H-Bridge using an artificial intelligence control method, such as Fuzzy PID with...
In this paper, we present our research efforts which investigates efficiency of mechanical energy transfer from flywheel to the overall mobile hovering robot body not only with simulations but also with real world experiments. To generate varying amounts of inertia with respect to rotation requirements, a counter rotating flywheel system is developed and multiple angular motion profiles are applied...
In this study, we examine simulation models of shunt, separately excited and permanent magnet direct current motor dynamic behavior during starting, steady state and stopping time (electrical braking) for dynamic simulation of electromechanical energy conversion using MATHEMATICA 10 environment. It is surly important to control the speed; keep it constant and reduce it safely with desired time while...
This paper mainly studies the angle tracking problem in electronic throttle system with unknown time-varying disturbances. Firstly, generalized proportional integral observer (GPIO) is used to estimate the time-varying disturbances including model uncertainties, friction torque and spring initial torque. Secondly, a composite controller combining disturbance estimation and backstepping control method...
Real-time simulation tools are commonly used for designing and testing of automotive embedded control systems. In addition, the Hardware-In-the-Loop (HIL) technique enables previous verification and validation of control strategy avoiding an expensive and time-consuming field test. For this reason, this paper shows a HIL platform for designing and testing of Electrical Power Assisted Steering Systems...
The feed flow rate of a syringe fluid dispensing system is regulated through a Proportional-Integral-Derivative (PID) and Active Force Control (AFC) control scheme that was actuated using a DC servo motor considering a real-time implementation. The focus of this study is to control the speed of a DC motor by implementing an AFC strategy in rejecting the disturbance in the system. The AFC is implemented...
The paper deals with the optimal energy control referring to an electrical servo drive system. The influence of the variable torque is considered. The optimal controller is established for the discrete case. A convenient algorithm for the studied problem is indicated and some simulation results illustrate the behaviour of the system.
A simulated study of three different control strategies to stabilize an inverted pendulum on a cart is presented in this paper. Linear Quadratic Regulator (LQR), Integer order PID (IOPID) and Fractional order PID (FOPID) are designed, applied and compared. A nonlinear model of the cart-pendulum system is first derived and used later in the simulation of the control strategies aforementioned. The tuning...
The paper describes the method for indirect determination of the torque, power and energy indices of an induction motor shaft. A developed research laboratory stand is presented. It enables load testing of an induction motor with a possibility of direct measuring the torque, speed, currents and voltages of the researched motor. The analysis of the experimental research of the method for indirect determination...
Comparative tests for efficiency of a drive equipped with reluctance synchronous motor and induction motor is the subject of the paper. Efficiency was determined for drives operating with constant torque. Test results indicate that use of the drive equipped with reluctance synchronous motor offer lower consumption of electric power in relation to the drive equipped with induction motor of the same...
Hand tremor is a neurological disorder that affects people with Parkinson's disease and elderly affecting day to day activities. Hand vibration is a rhythmic muscle movement that occurs due to disorder in the motor system of human body. There are no permanent treatment options available. The subjects typically do life style modifications to cope up with the disease. In this work, we propose a wearable...
This paper presents an experimental study on the impact of the parameter variations over the performances of a LMA (Loss Model Algorithm) designed for an IPMSM (Interior Permanent Magnet Synchronous Machine). In a previous work, the characterization was carried out by assessing, for several working conditions, the motor parameters that influence the motor efficiency. The proposed enhanced loss model...
The active mode rehabilitation robot is recently developed to help paralysis patients in improving their capability. The robot is usually completed with load and weighting mechanism. This paper presents an alternative weighting mechanism of active mode rehabilitation robot by using spiral spring as load source. PI controller is used to ensure the link reaching its last position by controlling the...
Direct-drive in-wheel motors have become an extremely attractive option for electric vehicles. Two kinds of motors are devised, Permanent Magnet Synchronous Motor (PMSM) and Permanent-Magnet Flux-Modulated Motor (PMFM), respectively. Keeping the same back EMF, current density and copper loss, this paper analyzes and compares torque density, torque ripple, flux-weakening performance, speed range, loss...
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.