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Item type:Publication, Access status: with files , Methodology and challenges of implementing advanced technological solutions in small and medium shipyards: the case study of the Mari4_YARD project(Multidisciplinary Digital Publishing Institute (MDPI), 2025-04-15); 31 23 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , A systematic approach to stable grasping of a two-finger robotic hand activated by jamming of granular media(Multidisciplinary Digital Publishing Institute (MDPI), 2023-04-18); ; ; ; A systematic approach is presented to achieve the stable grasping of objects through a two-finger robotic hand, in which each finger cavity was filled with granular media. The compaction of the latter, controlled by vacuum pressure, was used to adjust the structural and contact stiffness of the finger. The grasping stability was studied under the concurrent effect of an external torque and applied vacuum pressure. Stable grasping was defined as the no slippage condition between the grasped object and the two fingers. Three control schemes were adopted and applied experimentally to ensure the effectiveness of the grasping process. The results showed that stable and unstable grasping regions exist for each combination of applied torque and vacuum pressure. The two-finger robotic hands can be further improved for applications that require high load-carrying capabilities.Publicationtype: Journal ArticleScopus© Citations 2 43 255 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Radiation-tolerant all-digital PLL/CDR with varactorless LC DCO in 65 nm CMOS(Multidisciplinary Digital Publishing Institute (MDPI), 2021-11-10); ; ; ; This paper presents the first fully integrated radiation-tolerant All-Digital Phase-Locked Loop (PLL) and Clock and Data Recovery (CDR) circuit for wireline communication applications. Several radiation hardening techniques are proposed to achieve state-of-the-art immunity to Single-Event Effects (SEEs) up to 62.5MeVcm2 mg−1 as well as tolerance to the Total Ionizing Dose (TID) exceeding 1.5 Grad. The LC Digitally Controlled Oscillator (DCO) is implemented without MOS varactors, avoiding the use of a highly SEE sensitive circuit element. The circuit is designed to operate at reference clock frequencies from 40MHz to 320MHz or at data rates from 40 Mbps to 320 Mbps and displays a jitter performance of 520 fs with a power dissipation of only 11mW and an FOM of −235 dB.Publicationtype: Journal ArticleScopus© Citations 6 114 693 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Noise efficient integrated amplifier designs for biomedical applications(Multidisciplinary Digital Publishing Institute (MDPI), 2021-06-23); ; The recording of neural signals with small monolithically integrated amplifiers is of high interest in research as well as in commercial applications, where it is common to acquire 100 or more channels in parallel. This paper reviews the recent developments in low-noise biomedical amplifier design based on CMOS technology, including lateral bipolar devices. Seven major circuit topology categories are identified and analyzed on a per-channel basis in terms of their noise-efficiency factor (NEF), input-referred absolute noise, current consumption, and area. A historical trend towards lower NEF is observed whilst absolute noise power and current consumption exhibit a widespread over more than five orders of magnitude. The performance of lateral bipolar transistors as amplifier input devices is examined by transistor-level simulations and measurements from five different prototype designs fabricated in 180 nm and 350 nm CMOS technology. The lowest measured noise floor is 9.9 nV/√ Hz with a 10 µA bias current, which results in a NEF of 1.2.Publicationtype: Journal ArticleScopus© Citations 13 43 396 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Possibilities of increasing the low altitude measurement precision of airborne radio altimeters(Multidisciplinary Digital Publishing Institute (MDPI), 2018-09-11); ; ; ; The paper focuses on the new trend of increasing the accuracy of low altitudes measurement by frequency-modulated continuous-wave (FMCW) radio altimeters. The method of increasing the altitude measurement accuracy has been realized in a form of a frequency deviation increase with the help of the carrier frequency increase. In this way, the height measurement precision has been established at the value of ±0.75 m. Modern digital processing of a differential frequency cannot increase the accuracy limitation considerably. It can be seen that further increase of the height measurement precision is possible through the method of innovatory processing of so-called height pulses. This paper thoroughly analyzes the laws of height pulse shaping from the differential frequency presented by the number that represents the information about the measured altitude for this purpose. This paper presents the results of the laboratory experimental altitude measurement with the use of a so-called double-channel method. The application of obtained results could contribute to the increase of air traffic safety, mainly in the phase of the aircraft approaching for landing and landing itself.Publicationtype: Journal ArticleScopus© Citations 8 253 1764 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , An algorithm of daubechies wavelet transform in the final field when processing speech signals(Multidisciplinary Digital Publishing Institute (MDPI), 2018-07-18); ; Development and improvement of a mathematical model for a large-scale analysis based on the Daubechies discrete wavelet transform will be implemented in an algebraic system possessing a property of ring and field suitable for speech signals processing. Modular codes are widely used in many areas of modern information technologies. The use of these non-positional codes can provide high-speed data processing. Therefore, these algebraic systems should be used in the algorithms of digital processing of signals, which are characterized by processing large amounts of data in real time. In addition, modular codes make it possible to implement large-scale signal processing using the wavelet transform. The paper discusses examples of the Daubechies wavelet transform application. Integer processing, presented in the paper, will reduce the number of rounding errors when processing the speech signals.Publicationtype: Journal ArticleScopus© Citations 20 297 260