Implications of faults in manipulator joints on the work-space

1996-05-16
Aydin, KK
In this paper effects of faults in manipulator joints on the work-space of the manipulator are investigated. It is known that kinematic redundancy can be utilized to increase the fault tolerance of manipulators. Fault tolerance for manipulators is defined as the ability to continue the performance of a task after total failure or partial immobilization of a manipulator joint. Redundant planar manipulators are used in this study for demonstrating how kinematic redundancy can be utilized to compensate for joint faults. Effects of joint faults on the shape and size of the work-space of a manipulator are also presented. Work-space-under-fault is defined as a sub-work-space volume where a fault tolerant redundant manipulator can continue its work even under the failure of one or more of its joints.

Suggestions

Influence of EPS Geofoam Buffers on the Static Behavior of Cantilever Earth-Retaining Walls
Ertugrul, Ozgur L.; Ozkan, M. Yener (LookUs Bilisim A.S., 2012)
In this study, the effect of expanded polystyrene (EPS) buffers on lateral stresses and deflections of model retaining walls with various flexibility values were investigated. For this purpose, 0.7 m high model walls were instrumented and 1-g model tests were performed in laboratory environment. In the first group of tests, the wall models retain only granular cohesionless backfill whereas in the second and third group of tests, EPS deformable buffers of two different thicknesses were installed between ...
Investigation of process-affected zone in ultrasonic embossing of microchannels on thermoplastic substrates
Sucularli, Ferah; Arıkan, Mehmet Ali Sahir; Yıldırım, Ender (Elsevier BV, 2020-02-01)
In this paper, the process-affected zone in ultrasonically embossed thermoplastic substrates is investigated both numerically and experimentally. Commercialization of microfluidic devices challenges the need for high-speed manufacturing of plastic chips. Ultrasonic embossing is considered as an alternative method since the cycle time can be as low as a few seconds per chip while keeping the cost relatively low. To examine the ultrasonic embossing process, experiments were carried out to replicate 200 mu m w...
Effect of inelastic behaviour of load bearing walls on the frame–wall structural systems
Güler, Gökay; Sarıtaş, Afşin; Department of Civil Engineering (2009)
The purpose of this study is to investigate the influence of material and geometric nonlinearities occurring in beams, columns and walls of RC frame-wall structural systems when undergoing severe ground excitations. For this purpose, a low-rise RC building is considered with and without walls, and the joining beams and columns are designed with the strong-column weak-beam concept. The dimensions, material properties and the reinforcement amounts are calculated in accordance with the values suggested in desi...
Effects of Distributed Air-Gaps in the Iron-Core of Shunt Reactors on Inductance Components and Losses
Donuk, A.; Bilgin, H. F.; Ermiş, Muammer (2012-05-01)
In this paper, effects of dividing the air-gap in the iron-core of shunt reactors into several discrete gaps on inductance parameters of the equivalent circuit, core losses and gap losses are investigated. This is achieved by both analytical calculations and Finite Element Method based analyses. A new method called Moving Strip Method is also introduced to estimate the gap loss in the iron-core of shunt reactors having discretely distributed small air-gaps relative to those with large air-gaps. Theoretical ...
Influence of deformable geofoam bufers on the static and dynamic behaviors of cantilever retaining walls
Ertuğrul, Özgür Lütfi; Özkan, M. Yener; Department of Civil Engineering (2011)
Static and dynamic interaction mechanism of the retained soil-compressible geofoam buffer and yielding retaining structures requires further investigation. The present study, initiated on this motive, discusses the results of 1-g physical model tests and numerical analyses of cantilever retaining walls with and without deformable geofoam buffers between the wall and cohesionless granular backfill. 0.7m high walls with various wall thicknesses were utilized in the physical modeling. Dynamic tests were carrie...
Citation Formats
K. Aydin, “Implications of faults in manipulator joints on the work-space,” 1996, p. 197, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/63853.