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Recent standardization efforts in IEEE 802.15.4-2015 Time Scheduled Channel Hopping (TSCH) and the IETF 6TiSCH Working Group (WG), aim to provide deterministic communications and efficient allocation of resources across constrained Internet of Things (IoT) networks, particularly in Industrial IoT (IIoT) scenarios. Within 6TiSCH, Software Defined Networking (SDN) has been identified as means of providing...
Software defined networking (SDN) setups in general assume a perfect control channel between network devices and the centralized controller. Whilst this may be the case in certain controlled contexts such as data centers, when moving to wide area networks, this assumption does not necessarily hold true anymore. Therefore, there is the need to evaluate the impact of unreliable control plane behavior...
Emergency protection of objects in the process of testing and functioning should respond to a wide range of abnormal situations: malfunctions, which can be eliminated during testing; emergency situations that can be eliminated in the operational mode, or require the shutdown of the process and the elimination of the consequences of the accident; catastrophic situations that require an a priori reaction...
This paper presents a kind of architecture design of bus based CNC system of domestic-processor based on Loongson and analyzes both the design of module structure of domestic-processor based on Loongson and the function and implementation method of MII bus based CNC main control board. These studies can solve the problem of chip of domestic NC system chip and have great significance to improve the...
This work presents the major characteristics and lessons learned by the development and prototype implementation of an event-oriented and cloud-based SCADA system that is constructed using a microservice architecture. The microservices are then utilized to propose an approach for implementing product-driven production systems under the RAMI4.0 specification.
This paper presents new approaches for construction of knowledge-oriented control systems. The AND/OR-graph model is improved for control rules visualization and interactive processing. The knowledge-oriented system for the dispatcher that regulates the safe operation with electrical equipment made it possible to increase the reliability of decisions taken by the dispatcher by 12%.
In this study, a steady and comparatively smooth Ni-P coating on the surface of diamond/Al composite substrate was fabricated by electroless plating, which can outstandingly improve solderability of the composite. By controlling the deposition time, we obtained the growth curve of the Ni-P coating, and as a result we can adjust the thickness of the coating. The solderability was tested by soldering...
Thick film hybrid integrated circuit is a product of thick film technology and semiconductor technology. Because of some outstanding advantages, such as high reliability and high integration, hybrid integrated circuit has been gradually applied to aerospace electronic equipment. The situation of unstable electrical performance caused by individual parameters exceed standard in the hybrid integrated...
With the development of the automotive electronics and other fields of electronic products toward the direction of miniaturization, high density, high reliability and low power consumption, the three-dimensional system-level packaging technology has become a new direction of technology development. In the three-dimensional system-level package, due to the need to stack a variety of chips, and the...
In this paper, through the technology comparison analysis of the process planning and FO/AO, it is concluded that the process expression and management form of FO/AO are more suitable for the control of aircraft technical status. Integrated secondary development of MES system and CAPP system, it implements display form of FO/AO and process control based on MES system, and meets the requirement of...
this paper describes the plan design and technical features of 220kV Wangtie Smart substation, which includes many technical innovations, such as integrated measurement, control & protection devices, new busbar differential protection synchronization, adaptive sampling delay compensation of optical longitudinal differential protection, sampled value transmission mode based on online switching...
In this paper, the practical verification of Active Disturbance Rejection Controller (ADRC) implementation for pneumatic setup is investigated. Apart from experimental results, the inverse half-rule is suggested to support ADRC tuning for the second order processes by adjusting the value of the scaling factor. This rule is based only on the approximation of the process step response by First Order...
With high renewable power penetration, uncertainty and intermittence of renewable sources become major concerns of power system planning and operation. Large and fast wind speed change may cause great variation of active power generation, which may lead to system stability and reliability problems. The response speeds of the committed conventional generators (CGs) for frequency regulations are critical...
As industrial control systems are operating in the long run, the performance of their components will inevitably degenerate, which might ultimately lead to the systems failure. Compared with the single-component systems, the output of control systems may remain satisfactory tracking on the reference output due to the distinctive structure of closed-loop feedback, even if the structural parameters...
The Incident Tree Analysis methodology (ITA) can consider the uncertain characteristics of accident by combining fuzzy logic and information flow approaches together. But the dependence of man-machine interaction is not considered in ITA approach, which ignores the differences of task scenarios meanwhile. In this paper, we put forward an Improved Incident Tree Analysis methodology (IITA) taking this...
Infant failure seriously affects customer satisfaction, which is mainly determined by quality variations in manufacturing process, and it is the most critical part of product quality risk. However, most of manufacturers subject to lack of targeted quality variation controlling for infant failure risk, which causes neglecting of preventing and mitigating infant failure risk. Therefore, in this paper,...
Autonomic computing requires reliable coordination between different systems. The unexpected behavior of any component may endanger the performance of the overall system. For this reason, it is necessary to prevent and detect this type of situations and to develop methods to react accordingly and to mitigate the possible consequences. In this work, we present an analysis of the vulnerability of a...
Complexity is a term that is currently used not only in research articles but also in the methodologies and standards used to manage information and projects. The complexity can represent the size of a system, process, program or project, the number of functions and the cost of their acquisition, operation and maintenance. Within the context of this work, the complexity is a variable that represents...
Based on actual requirements and safety reliability requirements, this paper presents a design scheme of safety portable voice information recording equipment. There are two main parts in the whole system, one is the voice recording board and the other one is the portable military laptop. The voice recording board uses advanced RISC machines chip as the main chip equipped with real-time operating...
Cyber Physical Systems (CPS) use emerging computing, communication, and control methods to monitor and control geographically dispersed critical system components to allow a high level of confidence about their operation. Simulation methods are frequently used in testing such critical system components, however, it might not be adequate to show the absence of errors given the complexity of the system...
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