Safety control, a quantitative approach

Quantitative Approach to Safety Assessment of the Railway Interlocking System

The paper deals with a quantitative approach to safety assessment process applicable to the safety-related system, specially the railway interlocking one. The authors present the methodology based on the Failure Mode and Effects Analysis (FMEA) and the Fault Tree Analysis (FTA) that is applicable to performing safety analysis of both electronic and computer based systems. The mathematical basis...

Food Safety Accounting: As a Novel Interdisciplinary Approach in Iran

A Hierarchical Approach to Adaptive Control for Improved Flight Safety

Following failures of primary aerodynamic actuators, safe flight can be maintained by introducing alternative actuation systems, such as secondary aerodynamic surfaces and propulsion, for critical stability and control augmentation. This paper presents an intelligent hierarchical flight control system architecture that is designed using nonlinear adaptive synthesis techniques and on-line learni...

Safety Control Synthesis with Input Limits: a Hybrid Approach

We introduce a hybrid (discrete–continuous) safety controller which enforces strict state and input constraints on a system—but only acts when necessary, preserving transparent operation of the original system within some safe region of the state space. We define this space using a MinQuadratic Barrier function, which we construct along the equilibrium manifold using the Lyapunov functions whic...

Designing a quantitative safety checklist for the construction phase of ongoing projects in petrochemical plants

Background: One of the challenges in construction is the occurrence of numerous accidents. In this regard, risk assessment can play an important role in reducing accidents. The aim of this study was to prepare comprehensive and quantitative checklists to determine the potential hazards in the construction phase. Materials and Methods: The present descriptive and analytical study was carried ...