Lessons we learned from space systems EEE (Electrical, Electronic, Electro-Mechanical) components selection, procurement and control - ELOP experience

Author(s):  
O. Lieberman
2020 ◽  
pp. 1-16
Author(s):  
Bleddyn E. Bowen

In 1996 Colin Gray asked ‘where is the theory of space power? Where is the Mahan for the final frontier?’1 This book answers that question by presenting propositions of spacepower and a strategic analogy of Earth orbit as a cosmic coastline. This book’s spacepower theory shows how to think more constructively and critically about the use of space systems in warfare – satellites, their infrastructure, methods of attacking them, and their influence on modern warfare and strategy. Spacepower theory helps to answer questions like ‘will a war begin or be decided in space?’, ‘how do satellites change the way war is conducted on Earth?’ and ‘what difference can space warfare make on Earth?’ Engaging with these questions has never been so important, as the use and deployment of satellites and space infrastructure – or spacepower – have become essential for modern military and economic power. It underpins and shapes a global web of connectivity and information-based economies. It provides new methods of political–economic development and control for continent-sized states. Space warfare is a realistic prospect because space technologies are at the heart of military weapon systems, intelligence, logistics and economics, and the tools for harassing or disabling satellites are spreading. In short, spacepower and the spectre of space warfare cannot be ignored in international relations (IR) and modern strategy. Spacepower represents a logical extension of the concept of power – however defined – in IR and it ‘consists of capabilities designed to control, deny, exploit, and regulate the use of space’....


1996 ◽  
Author(s):  
S. Gardner ◽  
J. Balash ◽  
H. Callihan ◽  
M. Saverino

2021 ◽  
Vol 1199 (1) ◽  
pp. 012096
Author(s):  
L Čajkovič ◽  
F Pribilinec

Abstract Brakes are one of the most important components of vehicles. This is due to their function of decelerating, regulating vehicle speed and keeping vehicles stationary. The correct function and reliability of this system is essential for safe operation and vehicles driving. In our case, we deal with the brakes of rail vehicles. As trainsets achieve higher weights and speeds, great emphasis is also placed on improving the friction components of brake systems, which must meet the strict parameters set by the International Union of Railways (UIC) and must be tested on specialized approved test benches, before being put into service. As the demands on the development of friction components increase, so do the demands on their testing. From this point of view, there is necessary constant improvement in the measuring lane of the brake bench. It is necessary to improve the measuring and control technology as well as the mechanical components. This paper deals with the study of mechanical components in terms of operational dynamics. The main idea of the work is to create a virtual model of the brake bench in order to simulate the operating states and determine the critical modes with a possible adverse impact on the course of measurement and control. During the measurement, the monitored parameter is an important simulated mass, which must meet a precisely determined tolerance for the success of the measurement.


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