The transformation of traditional offline operations into digitally integrated offline-online environment has been a difficult challenge for firms from both operational and strategic perspectives, and has become a major topic of research for scholars. We conducted a comparative case study to explore an emerging trend – the convergence of offline and online operations and strategies. This study ...

Many engineering disciplines have become reliant on WSNs in order to detect and track certain events of interest by monitoring various parameters, through a number of spatially distributed wireless sensors. Due to resource constraints of sensor hardware, traditional WSN applications involved exchanging an excessive amount of data, usually in an offline mode, between sensor nodes and a central u...

Transport-category or FAR/CS 25 certified airplanes may occasionally become braking energy capacity limited. Such limitation may exist when heavy airplanes are departing airports at high-density altitudes, on relatively long runways, and/or possibly with some tailwind component. A maximum braking energy VMBE speed exists which may limit the maximum allowable takeoff decision/action speed V1. Th...

Simulation-to-Flight” is a research development concept to reduce costs and increase testing efficiency of future major aeronautical research efforts at NASA. The simulation-to-flight concept is achieved by using common software and hardware, procedures, and processes for both piloted-simulation and flight testing. This concept was applied to the design and development of two full-size transpor...

Conventional Mach-independent subsonic drag polar does not replicate the real airplane drag characteristics exactly and especially not in the drag-divergence region due to shock-induced transonic wave drag. High-bypass turbofan thrust is a complicated function of many parameters that eludes accurate predictions for the entire operating envelope and must be experimentally verified. Fuel laws are...

Distributed cyber-physical systems (DCPS), such as aeronautics and ground transportation systems, are very hard to design and verify, because of asynchronous communication, network delays, and clock skews. Their model checking verification typically becomes unfeasible due to the huge state space explosion caused by the system’s concurrency. The Multirate PALS (“physically asynchronous, logicall...

in this research, the calculation method of aerodynamic loads on an airplane in all flight situations is presented. in order to find an calculation equation for aerodynamic loads on an airplane in all flight conditions, the f-5 aircraft is selected as a prototype is divided into one hundred small parts longitudinally. therefore, the numerical solutions are taken place in different conditions of...

This paper presents the design and simulation of an intelligent fuzzy controller to control the flight movement of an airplane being present in the midst of targeted missiles. The objective is to have the in-flight airplane, when an imminent collision danger occurs, move in a direction so as to avoid being hit by any of the targeted missiles. The airplane senses the environment around it, acqui...

Information from the sky is important for rescue activity in large-scale disaster or dangerous areas. Observation system using a balloon or an airplane has been studied as an information gathering system from the sky. A balloon observation system needs helium gas and relatively long time to be ready. An airplane observation system can be prepared in a short time and its mobility is good. Howeve...

Every airplane has an associated external flow field that is extraordinarily rich in terms of its flow physics. It is intuitively obvious that the shape and configuration of the airplane influences the external flow physics, and the nature of the flow field influences the aerodynamic performance. An airplane is designed to perform optimally under certain operating conditions. Its aerodynamic pe...