Browsing by Author "Vasilev P."

Now showing 1 - 4 of 4
  • No Thumbnail Available
    Item
    ANSI/ISA 95 final capacity scheduling for software industry
    (2015-01-01) Vasilev P.
    The Scheduling in Software Industry is a matter that caused many studies and various approaches for solving this problem in the past few decades. Neither of these approaches uses as a framework the industrial standard ANSI/ISA 95 in which the models for Capability, Scheduling and Execution are tightly connected with the needed Resources and their availability. In this research the matter of Final Capacity Scheduling using the standard ANSI/ISA 95 as a framework is discussed. Examples are given for using ISO 22400 Key Performance Indicators in the calculation of some important for the Scheduling process parameters.
  • No Thumbnail Available
    Item
    Design of a Multifunctional Operating Station Based on Augmented Reality (MOSAR)
    (2021-03-01) Ivanova V.; Vasilev P.; Stoianov I.; Andreev R.; Boneva A.
    Design principles of a novel Multifunctional Operation Station (MOS) using Augmented Reality (AR) technology (MOSAR) are proposed in this paper. AR-based design allows more ergonomic remote instrument control in real time in contrast to classical instrument-centered interfaces. Another advantage is its hierarchical software structure including multiple programming interpreters. The MOSAR approach is illustrated with a remote surgical operating station that controls intelligent surgical instruments. The implementation of the Operation Station (MOS) is based on the multiplatform open-source library Tcl/Tk, and an AR extension has been developed on a Unity platform, using Vuforia SDK.
  • No Thumbnail Available
    Item
    IEC 62264 standard-based manufacturing operations management resource modelling for electron beam welding
    (2023-01-01) Vasilev P.; Koleva E.
    The development and deployment of a Manufacturing Operations Management (MOM) system for electron beam welding aims the integration and organization of the accumulated knowledge for the process, and the application of this knowledge for the improvement of the modelling and control capabilities, their efficiency, adaptability, flexibility and re-configurability, as well as integration with other technological processes. The paper presents the Unified Modelling Language (UML) information modelling of electron beam welding installation as a part of an IEC 62264 standard-based manufacturing operations management system development.
  • No Thumbnail Available
    Item
    Unified Modelling Language Application for Laparoscopic Instrument Design
    (2024-01-01) Ivanova V.; Boneva A.; Vasilev P.
    Laparoscopic surgery is a very popular medical intervention for the diagnosis and treatment of some abdominal problems and diseases. Compared with open surgery, laparoscopic procedures reduce patient trauma and recovery time. Still, at the same time, the surgeon’s dexterity is reduced as a result of the operation specificity and instrument construction. Correct behaviour of every device and instrument during its activities is an important condition for the proper operation of the whole system. The main purpose of this work is to model the operating behaviour of an instrument-organ interaction in an environment which is similar to the real one. The ultimate target of this study is focused on the development of a functionally operating model of a laparoscopic executive instrument for robots with improved engineering characteristics. To achieve the goals, the following main tasks are decided: i) Unified Modelling Language is applied to demonstrate the operating behaviour of a device in real-time. UseCase diagram and 3 Activity diagrams have been developed; ii) an original model of an instrument with 4 degrees of freedom for robot-assisted surgery is designed. In contrast to EndoWrist technology created by Intuitive Surgical Incorporation, USA for DaVinci instruments (with 3 orthogonal rotations), we offered other construction decisions. The designed instrument provides a kinematic structure with a combination of perpendicular and parallel rotations ((Formula presented)) which avoids additional rolls and allows obtaining the optimal working area of this instrument. This study is a continuation of previous work in the surgical robotics area.