Title of Thesis: FIXTURE-BASED DESIGN SIMILARITY MEASURES FOR VARIANT FIXTURE PLANNING Degree candidate: Sundar Balasubramanian Degree and year: Master of Science, 1999 Thesis directed by: Dr. Jeffrey W. Herrmann Department of Mechanical Engineering and Institute for Systems Research One of the important activities in process planning is the design of fixtures to position, locate and secure the...

For high-bay and outdoor lighting fixtures, the cost of LED driver electronics is reported to be 17 percent of the total fixture cost. An additional 40 percent of the fixture cost comes from the mechanical, thermal and electrical portions of the fixture [1]. These portions help support the weight and volume of the LED driver, as well as protect the driver against surge events, such as lightning...

This paper presents a modeling procedure and diagnostic algorithm for fixture related faults in panel assembly. From geometric information about the panel and fixture, a fixture fault model can be constructed off-line. Combining the fault model with inline panel dimensional measurements, the algorithm is capable of detecting and classifying multiple fixture faults. The algorithm, which relies h...

The objective of positioning the fixture elements in the fixture is to make the workpiece stiff, so that geometric errors in the manufacturing process can be reduced. Most of the work for optimal fixture layout used the minimization of the sum of the nodal deflection normal to the surface as objective function. All deflections in other direction have been neglected. We propose a new method for ...

This paper details an application of genetic algorithms (GA) developed for the optimisation of fixture locator positioning for 3D freeform components. Based on the information of the workpiece, a genetic algorithm based approach is applied to determine the most statically stable fixture configuration from a large number of possible candidates. The preliminary implementation is introduced to dem...