Non-Statistical Method for Validation the Time Characteristics of Digital Control Systems with a Cyclic Processing Algorithm

The paper discusses the problem of performance and timing parameters with respect to the validation of digital instrumentation and control systems (I&C). Statistical methods often implicitly assume that the probability distribution law of the estimated parameters is close to normal. Thus, the confidence intervals for the parameter are determined on the grounds of this assumption. However, we encountered cases when the delay distribution law in I&C is not normal. In these cases, we used the non-statistical network calculus method for time parameters estimation. The network calculus method is well elaborated for lossless digital system models with seamless processing algorithm depending only on data volume. We consider the extension of the method to the case of I&C systems with considerable changes in the data flow and content-dependent processing disciplines. The model is restricted to systems with cyclic processing algorithms and fast network connections. Network calculus describes the data flow and system parameters in terms of flow envelopes and service curves that are generally unknown in advance. In this paper, we define equations that allow the calculation of these characteristics from experimental data. The correspondence of the Network Calculus and classical statistical estimation methods is discussed. Additionally, we give an example of model application to a real I&C system.

APPLICATION OF VIRTUAL INSTRUMENTS TECHNOLOGY IN AN AUTOMATED TEST BENCH FOR MEASURING PARAMETERS OF AIR TRAFFIC CONTROL TRANSPONDERS

Дана оценка использования цифровой контрольно-измерительной аппаратуры при проверке авиационных систем в соответствии с руководящими документами ARP4754 и DO-178C. Указано, что в автоматизированных стендах на основе ЭВМ, в отличие от традиционных подходов, повышается роль программного обеспечения (ПО). Приведен обзор существующих ре -шений для проверки приемоответчиков управления воздушным движением (УВД). Сделан вывод о необходимости доработки автоматизированного измерительного стенда проверки бортовых систем предупреждения столкновений (БСПС) с целью оценки параметров приемоответчиков УВД на стадиях их разработки и проведения сертификационных работ в соответствии с DO-181E. Сформированы требования к ПО. Представлены результаты практической реализации автоматизированного измерительного стенда. An assessment of the use of digital instrumentation equipment for testing airborne systems under the guidelines ARP 4754 and DO-178C is given. It is shown that in the computer-based automated test bench, unlike traditional approaches, the importance of software increases. An overview of existing solutions for testing air traffic control (ATC) transponders is provided. It is concluded that it is necessary to refine the automated measuring bench for testing the airborne traffic collision avoidance systems (TCAS) to assess the parameters of ATC transponders at the stages of their development and certification under the guideline DO-181E. Software requirements are formed. The results of the practical implementation of an automated measuring stand are presented.

Novel Model-Based approach for instrumentation and control of nuclear reactors

Technological platforms dedicated for digital instrumentation and control of nuclear reactors are quite complex in terms of functionalities and devices. Hence, the design of these platforms requires high-level abstraction layers able to reduce the complexity, to rise the automation and to check the consistency between different development stages. The development of such systems is a challenging task that requires modeling of various components at different levels of abstraction and viewpoints, notably functional, hardware and software levels. In this paper, a new system engineering methodology is proposed to provide high-level models of different components and inter/intra-communication between them. These models are used for system specification, architecture design, performance evaluation or verification and validation. This approach focuses on the internal behavior of different components at different levels of abstraction in order to enable the interoperability of these components and to enhance cooperation between different stakeholders of the development process. An experimental setup has been carried out to validate this approach by customizing an open source model based engineering tool, Eclipse Papyrus, towards a significant reduction of system development cost in terms of engineering resources and equipment devices.

Instrumental records received in 11 storey steel frame building during a remote earthquake

On August 9, 2017, a strong earthquake with a magnitude Mw = 6.3 occurred in the Xinjiang Uygur Autonomous Region of China. For the first time in the last 10 years, representative instrumental data were obtained at the seismic station No. 11 (“Prospect Abay”) in the city of Almaty, equipped with a digital instrumentation and measuring system. The building is eleven-story and is made in a steel frame. In the city of Almaty, there is a significant number of residential and public buildings made in a steel frame. Using the AT 1105 sensors and the RSM-8 recorder, high-quality instrumental records of accelerations in the basement and on the roof of the building were obtained, as well as the β spectral curves. The frequency composition of the impact at the basement level has been determined. The prevailing period of fluctuation at the basement level is 0.3 sec, and at the roof level is close to 1.3 sec. It was found that during a remote earthquake, resonant vibrations of the building took place. The results of the work can be used in the design of buildings with a steel frame in the city of Almaty.

Transformative Psychometric Research Trioengineering Modeling: Triangulating Digital Instrumentation, Implementation, and Data Analysis for Effective, Efficient, and Engaging Classroom Inquiry

This monograph provides an in–depth discourse on “Research Engineering” in the field of “Educational Science” first detailed in a 2012 Journal on Mathematics article. Research Engineering involves the methodology and the metrics used to conduct in–depth research investigations via the innovative Total Transformative Trichotomy–Squared [Tri–Squared] Test. The triangulation of this test aids in the comprehension of how the Tri–Squared calculation is a mixed methods research design based upon “Trichotomous Psychometrics”. Trichotomous Psychometrics involves the development, deployment, and analysis of “Trifold Assessments” for the holistic transformation of qualitative outcomes into quantitative data. This paper is a continuation of the published article entitled: The Psychometrics of Educational Science: Designing Trichotomous Inventive Investigative Instruments for Qualitative and Quantitative for Inquiry.