Managing manmade system disasters with advanced cybernetics

1998 ◽  
Vol 17 (4) ◽  
pp. 231-244
Author(s):  
Jyh-Horng Tarn ◽  
Michael S. David ◽  
H. Joseph Wen
Keyword(s):  
Decision Support ◽  
Control Systems ◽  
Critical Systems ◽  
Control Structures ◽  
Model Base ◽  
Common Path ◽  
Control Processes ◽  
And Control

Many well-known manmade system disasters exhibit a common path to catastrophe. These functional failures resulted from the gaps that eventually contribute to the development of a tragedy and essentially exist between human and machine capabilities, responses and interfaces and between control processes and control systems. Conducting an analysis of the typical contingency control structures, the authors suggest that management adopt a pessimistic and quasi-intelligent orientation to control and monitor critical systems. This research proposes a threat-driven model base with decision support technologies to enhance conventional control systems and supplement management and operational responses so that the sphere of damage can be minimized.

Learning control of robot manipulators by interactive simulation

Robotica ◽  
2005 ◽  
Vol 23 (4) ◽  
pp. 515-520 ◽  
Author(s):  
Rafael Kelly ◽  
Sebastian Dormido ◽  
Carmen Monroy ◽  
Elizabeth Díaz
Keyword(s):  
Control Systems ◽  
Position Control ◽  
Graphical Representation ◽  
Robot Manipulators ◽  
Robot Dynamics ◽  
Interactive Simulation ◽  
Robot Arm ◽  
Control Structures ◽  
Dynamics And Control ◽  
And Control

Control systems of robot manipulators offer many challenges in education where the students must learn robot dynamics and control structures, and understand relations between the control parameters and the systems performance. Interactive simulation is aimed at improving the understanding of and intuition for the abstract parts of the control of robot courses. This paper presents an application of interactive simulation to teach control systems of robots. The application considers a nonlinear robot arm and two control modules: position control and motion control. Students can directly manipulate graphical representation of the systems such as a choice among seven control structures, controller gains, and desired trajectories, and obtain instant feedback on the effects. These features make the interactive learning tool stimulating and of high pedagogical value.

Reliability Assessment of Control Systems

2011 ◽  
Vol 467-469 ◽  
pp. 174-180
Author(s):  
Salvatore Distefano
Keyword(s):  
Control System ◽  
Control Systems ◽  
Reliability Assessment ◽  
Critical Systems ◽  
Monitoring And Control ◽  
Dynamic Reliability ◽  
Reliability Block Diagrams ◽  
Safety Critical Systems ◽  
The Right ◽  
And Control

Actually modern systems have to ensure higher and higher operating standards, thus including monitoring and control subsystems for their achievement. In safety critical systems control is a crucial task in order to satisfy strict reliability requirements. But it is also necessary that the control system is itself reliable. As a consequence, adequate techniques are necessary in order to perform reliability evaluation of both the controlled and the control systems. Techniques that therefore should avoid over-simplistic assumptions and/or approximations that, for example, are usually introduced when dependencies, interferences and other dynamic reliability aspects are not taken into the right consideration. In this paper, a technique for carefully evaluating the reliability of such systems, also considering dynamic aspects and behaviors, is proposed. Firstly the technique is detailed through the specification of the dynamic reliability block diagrams notation, and therefore in order to demonstrate its effectiveness, it is applied to an example of a computing-based control system taken from literature, thus providing guidelines for the reliability representation and evaluation through DRBD.

scholarly journals Risk-Oriented Approach as the Basis for the Corporate Accounting Policy Formation

2018 ◽  
Vol 5 (4) ◽  
pp. 120-130
Author(s):  
V. M. Rumyantseva
Keyword(s):  
Corporate Governance ◽  
Control Systems ◽  
Internal Control ◽  
Policy Formation ◽  
Control Processes ◽  
Economic Entity ◽  
Group Relationships ◽  
And Control ◽  
Oriented Approach ◽  
Accounting Policy

The evolution of accounting and reporting, the relevance of risk orientation as the basis for the organization of accounting and control processes involves the expansion of ideological fundamentals of the formation of corporate level accounting policy. The risk-oriented approach should be the basis of accounting and control processes of any economic entity. That is why, it is the risk-oriented approach that should be the basis for formation of the accounting policies and internal control systems of the economic entity. In the corporate structure the risks related to corporate governance are particularly important. Therefore, corporate accounting policy, while expanding its borders, must take into account corporate risks related to inter-group relationships. Through the formation of and disclosure of corporate accounting policy the planning and control of joint activities is implemented, which involves analysis and monitoring of strategic risks. Risk-oriented corporate accounting policies, being the regulator of corporate relationships through the implementation of the managerial function can influence the effectiveness of corporate integration. Corporate accounting policy may be the means of achieving the synergy effect in the enterprise integration by defining and regulating the most efficient forms of interaction of the reproduction process members. The evolution of accounting policies closely associated with the evolution of accounting and reporting, leads to the need to identify the relationship of accounting policies and internal control systems at all levels of corporation government, because it is the accounting policy that determines the intra firm accounting principles and is the regulator of corporate relations at all levels of corporate governance. Monitoring of accounting policy, based on the principle of materiality is key to both the separate legal entity that is the part of the group, and to the entire perimeter of consolidation. Key risks relate to the concept of materiality and correspond to the key issues of the auditing that is relevant in the context of the new requirements of the international auditing standards.

scholarly journals Efficiency of ensuring the survivability of logistics information and control systems

2020 ◽  
Vol 217 ◽  
pp. 07025
Author(s):  
Vladimir Anisimov ◽  
Evgeniy Anisimov ◽  
Tatyana Saurenko
Keyword(s):  
Control System ◽  
Decision Support ◽  
Mathematical Models ◽  
Control Systems ◽  
Wide Class ◽  
Business Processes ◽  
Methodological Approach ◽  
Management Systems ◽  
Logistics Information ◽  
And Control

The article proposes a methodological approach to assessing the effectiveness of measures to ensure the survivability of management systems for logistics business processes. The effectiveness of these measures is determined as the degree of preservation of the capabilities of control systems to perform their functions under the conditions of destructive influences. It is proposed to use a function as an indicator of effectiveness, the argument of which is the change in the duration of the control cycle associated with the need to restore the operability of the control system after destructive influences. The proposed approach forms the basis for constructing mathematical models of decision support for the choice of means and methods of ensuring survivability for a wide class of management systems for logistic business processes.

Cybersecurity Case for FPGA-Based NPP Instrumentation and Control Systems

2016 ◽  
Author(s):  
Oleg A. Illiashenko ◽  
Yevheniia V. Broshevan ◽  
Vyacheslav S. Kharchenko
Keyword(s):  
Control Systems ◽  
Nuclear Power ◽  
Power Plants ◽  
Subjective Assessment ◽  
Security Requirements ◽  
Critical Systems ◽  
International Regulations ◽  
Field Programmable ◽  
High Level ◽  
And Control

Modern industrial instrumentation and control systems (I&Cs) used in nuclear power plants (NPP) are facing more with cybersecurity threats and vulnerabilities, which were neglected before. Cybersecurity incidents are a subject to grow into more complex attacks with worse consequences than before. The use of field programmable gate arrays (FPGA) in such critical systems causes specific risks for ensuring of safety, as the master-property of such kind of systems, and security as a subordinate property primarily to the NPP reactor trip systems (RTS). Cybersecurity assessment results of industrial I&Cs are mainly based on subjective assessment of the expert judgment and they do not take into account all features of propagating FPGA technology. Nowadays there is a big gap in understanding how to assess and assure the security of FPGA-based NPP I&Cs (FNI&Cs). Conformance of FNI&Cs to security requirements, their verification to high-level standards often is subjective and depends on particular expert. Regulatory and certification bodies, developers and end-users of FNI&Cs are missing the understandable methodology for security assurance of such kind of systems taking into account specific context of the operating environment which allows decreasing time-to-market and thus providing benefits for all interested parties. The paper describes cybersecurity assurance technique of multi-version FNI&Cs. Requirements profile is formulated using the best practices from the following international regulations. The goal of the paper is presentation of the case-based methodology and tool of FNI&Cs cybersecurity assurance based on international regulations. Proposed methodology provides comparable and repeatable process of assurance.

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