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Regenerative shock absorbers (RSAs) can convert the kinetic energy originally dissipated in the dampers to electrical energy, with the help of electric machines [1, 2].
We describe Team WPI-CMU's approach to the DARPA Robotics Challenge (DRC), focusing on our strategy to avoid failures that required physical human intervention. We implemented safety features in our controller to detect potential catastrophic failures, stop the current behavior, and allow remote intervention by a human supervisor. Our safety methods and operator interface worked: we avoided catastrophe...
Ropeless elevators have developed very quickly in recent years. There are two main drawbacks of the conventional elevators with rope, especially when they are used in skyscrapers of 250–400m high [1]. One problem is that the space occupancy of the total floor space would be more than 30% in buildings over 250m high [2]. Another drawback is that controlling the elevator in tall buildings is difficult...
Nanoscale circular plates are encountered in several nanotechnology-based devices such as nanoelectromechanical systems. Structures are size dependent at nanoscale due to surface energy effects. It is possible to capture such size dependence through special continuum models. In this paper, the Gurtin–Murdoch continuum theory is applied to develop a new continuum mechanics model for static deformation...
An analysis of stability and transparency of a force feedback teleoperation system for cutting-edge robotic surgery is presented. Previous works in teleoperated robotic surgery do not consider the real behavior of the environment, which was supposed to be only elastic. However, new surgical procedures in which the environment dynamics plays a crucial role start emerging as a result of technological...
The effect of ultrasonic energy on the interfacial microstructure in Cu-Al bonds is investigated to establish a relationship between ultrasonic energy, interfacial structure and bonding strength. It is shown that formation of intermetallic compounds (IMCs) at a Cu/Al interface is strongly dependent on the character of ultrasonic vibration; higher levels of ultrasonic energy enhance fragmentation of...
A systematic search of solution space has been developed with the use of computational tools in the design of mechanisms in conceptual design. One of the common methods is based on combinatorial algorithms of building blocks in the database. However, the problem of using systematic search is that too many alternatives are produced to be seriously considered by the designers. This paper addresses the...
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