In this paper, we present experiments to determine the e ect of di erent virtual xture compliance levels in a human-machine cooperative manipulation system. Subjects used the JHU Steady Hand Robot with vision-based virtual xtures to perform three common tasks: curve following, o -path targeting, and object avoidance. The virtual xtures provided di erent levels of guidance to the operator, rangi...

Hidden Markov Models (HMMs) are used for automatic segmentation and recognition of user motions. A new algorithm for real-time HMM recognition was developed. The segmentation results are used to provide appropriate assistance in a combined curve following and object avoidance task. This assistance takes the form of a virtual fixture, whose compliance can be altered online. Recognition and assis...

Modular and scalable systems for radiomonitoring Compact digital broadband direction finders: extremely fast and highly precise Comprehensive monitoring of MPEG-2 transport streams 2 The focus of this issue is radiomonitoring: The latest generation of the R&S ® RAMON product family – systems for radiomonitoring and communications intelligence – is presented on page 39. The broadband Direction F...

Fixture design is an important issue in the process of manufacturing. Fixture design is a critical design activity process which bridges Computer-Aided Design (CAD) and Computer-Aided Manufacturing (CAM). The present paper presents a literature review of the Computer-Aided Fixture Design (CAFD) approaches performed. The purpose of this research is to give a deep and quick understanding of fixtu...

We present a four point bending setup suitable for high precision characterization of piezoresistance in semiconductors. The compact setup has a total size of 635 cm(3). Thermal stability is ensured by an aluminum housing wherein the actual four point bending fixture is located. The four point bending fixture is manufactured in polyetheretherketon and a dedicated silicon chip with embedded piez...

A fixture is a device that locates and holds parts during machining or assembly. A modular fixture employs reusable components on a regular lattice. Given a part, machinists combine intuition with trial-and-error to design an appropriate fixture. When a machinist is unable to find a design, it may be the case that (1) a feasible design was overlooked or (2) no feasible design exists. Complete a...