2015 IEEE International Workshop of Electronics, Control, Measurement, Signals and their Application to Mechatronics (ECMSM)

The control of the vibration amplitude, and the resonance frequency tracking for ultrasonic transducer have been established. However, some applications require to control the vibration amplitude and its relative phase at a fixed frequency as the generation of travelling wave. In this paper, the transducer is modelled in rotating frame, and the decoupling according to two-axis allows to obtain a d... View full abstract»

Self-test and diagnosis is an inherent part of fault tolerance approaches, which are realized by active hardware redundancy. The test must be available in-field and has to provide a diagnostic resolution, which matches the repair function of the fault tolerance approach. Continuous development lead to ever fine grained repair functions, which require a growing diagnostic resolution. Typically, fau... View full abstract»

A quartz oscillator is susceptible to electromagnetic interference (EMI). To evaluate the effect of EMI, this research used the same quartz oscillator circuit for transmitter(s) and receiver(s), but with distinct quartz crystal (QC) frequencies. An equivalent impedance change occurred because of the reactive near-field feedback on the quartz oscillator. The strength was roughly proportional to the... View full abstract»

In this paper a developed universal system for testing of electrical motors will be described. The research of stator and rotor faults of induction motors has a need for measurements of good and damaged motors under various loads and power supply conditions. This new diagnostic system allows a fully automatic measurement of all relevant values, like supply voltage, stator currents, shaft speed and... View full abstract»

The pressure sensor is a key device in many mechatronic systems for automotive and industrial applications. We represent the piezoresitive pressure sensor based on the single crystal silicon strain gauges, which are glass-fused to the stainless steel diaphragm at high temperature. The silicon bulkmicromachined strain gauges have the through holes and the closed structure, unlike the current compet... View full abstract»

This paper deals with the problem of coordinating a dual arm robot equipped with several cameras. Our goal is to use the redundancy formalism to realize a real coordination of the two arms with an image based control, while satisfying additional constraints such as avoidance of the joint limits and occlusions. Simulation results validate our approach. View full abstract»

Dynamic rotor faults of induction machines as broken bars or rotor dynamic eccentricity cause dynamic changes in the rotor electromagnetic field and therefore also in the magnetomotive force. These changes cause motor current amplitude and phase modulation. The phase modulation causes that the rotating electromagnetic field has not a stable angular frequency but oscillates around its angular frequ... View full abstract»

This paper describes the implementation of a local ICP-SLAM (Iterative Closest Point - Simultaneous Localization and Mapping) to improve the method presented in [1]. The ICP algorithm is known as a method that requires more computation time when the environment grows leading to poor results for both localization and mapping. To overcome this problem, a local ICP-SLAM is introduced which is based o... View full abstract»

The biological of spider legs inspired the development of a biomimetic pneumatic actuator for robotic applications. The concept is to straighten the joint by pressurizing the interior of an exoskeleton to inflate a bellows-like flexible membrane. The flexion is initiated by contraction of a McKibben-type muscle, which is integrated in the exoskeleton chamber. A detailed mathematical model to opera... View full abstract»

Single-Phase induction motors are used in simple industrial applications very often. This article deals with a singlephase motor fan used in heating system of industry buildings. Single-phase distribution of electricity is cheaper and simpler. However, it brings some disadvantages in using electric machines such as induction motors. The analysis shows problems of using slip to control velocity by ... View full abstract»

In this paper we present our approach to the rapid and efficient development of an automatic speech recognition (ASR) system for Russian. We try to utilize our tools, procedures and data previously designed and collected for other Slavic languages, Czech and Slovak. We show how we build a large corpus of texts acquired from major publishers' web pages and convert it from Cyrillic to Latin to simpl... View full abstract»

This paper describes the design of a medium size three-axis manipulator. The implementation of CNC control is also presented. The equipment has been designed and produced for the purpose of CNC systems teaching based on the electrical drives. The basis for the control system is an industrial computer. The Module with PWM outputs supplies the power to the drives of all three axes which have DC moto... View full abstract»

Vietnamese is a syllable-based tonal language where the tone used in syllable pronunciation carries important information about the meaning. In this paper, we investigate several approaches how to incorporate the tone into an acoustic model. We propose 3 basic strategies: a) a phoneme-based, b) a vowel-based, and c) a rhyme-based one. Each can be modified so that we obtain 15 different schemes tha... View full abstract»

This paper deals with the problem of nonlinear echo cancellation. One of the established approaches to this task is that of adaptive filtering using power filters. These filters model the unknown nonlinear system as a set of monomials, followed by a set of linear systems. The monomials are monotonously increasing functions useful for modeling nonlinearities such as soft-clipping, but only to a lim... View full abstract»

In the recent years sensor networks have emerged as an effective tool for monitoring environments that are large in size and have complex topology. They have been successfully applied to solve various problems such as monitoring of different environmental indicators, detection of floods and fires, temperature control in office buildings, to collect information about the health status of hospitaliz... View full abstract»

This work is focused to measurement and evaluation of mechanic, electric and control quantities and their potential usage in complex dynamic measurement of mechanisms. The servo motor signals like outputs from converter, control unit and controller were analyzed. The mechatronic stand was designed and assembled for realization of experiment. The mechatronic system included the Siemens Sinamics and... View full abstract»

The paper exposes the topic of LED lighting systems flicker. The topic of extra low voltage LED lamps flicker has not been much discussed yet. A variety of commercially available extra low voltage (ELV) lamps were tested with respect to the light flicker produced when powered by nominal DC voltage. The same measurement is repeated with distorted and fluctuating voltage. Reverse engineering methods... View full abstract»

Design and construction of a fast and accurate low-frequency impedance analyzer is presented. Main application of the device is in semi-active noise and vibration damping with piezoceramic actuators in the frequency range from 50 Hz to 5 kHz. Constructed device presented here is based on an ARM microcontroller as a control and communication unit and analog part for synchronous voltage and current ... View full abstract»

This paper describes issues of experiments with the model of the enhanced RADIUS protocol simulated in Colored Petri Nets. The model simulates the distributed network topology with one supplicant and several RADIUS servers and already was published in details without issues of practical experiments. Those experiments show that the enhanced RADIUS protocol could be a solution of the problem with au... View full abstract»

This article describes the development of the measurement and controlling module that can be controlled through some mobile device (smartphone or tablet) application. The design was influenced by the experiences from the former development and user reactions of similar device that was commercially successful and with good reception. The goal was to create a low-end device that would be also very p... View full abstract»

This article brings the description and the method for the object detection and analysis of the sliding drop on the inclined surface. This experimental work is essential for the knowledge on the adhesive coefficient determination. The investigation method was tested directly on selected surfaces - one ultra hydrophobic. The set of measurements proved the idea of the linear dependence of the inclin... View full abstract»

In the context of obstacle detection and tracking for a vision-based ADAS (Advanced Driver Assistance System), one mandatory task is vehicle localization. Vision-based SLAM (Simultaneous Localization and Mapping) proposes to solve this problem by combining the estimation of the vehicle state (localisation : position and orientation) and an incremental modelling of the environment using a perceptio... View full abstract»

This paper presents a software-based technique for handling permanent faults in low-cost memories for embedded systems. Basically the technique is based on an adaptation of the program code that avoids the usage of faulty memory words. With this technique it is possible to handle permanent manufacturing faults in simple and cheap memories without any kind of hardware-based fault management in the ... View full abstract»