Multimodal Human-Machine Interface For Haptic-Controlled Excavators

The goal of this research is to develop a human-excavator interface for the hapticcontrolled excavator that makes use of the multiple human sensing modalities (visual, auditory haptic), and efficiently integrates these modalities to ensure intuitive, efficient interface that is easy to learn and use, and is responsive to operator commands. Two empirical studies were conducted to investigate conflict in the haptic-controlled excavator interface and identify the level of force feedback for best operator performance

Usability Evaluation of a Coordinated Excavator Controller with Haptic Feedback

Reprinted with permission from the Institute of Industrial Engineers, 3577 Parkway Lane, Suite 200, Norcross, GA 30092, www.iienet.org. Copyright©2011 by Institute of Industrial Engineers.Presented at the 2010 Industrial Engineering Research Conference, Cancun, Mexico, June 5-9, 2010.The purpose of this study is to conduct a usability evaluation in order to investigate the actions and behaviors of human operators as they interact with a coordinated excavator controller with haptic feedback, and to identify potential usability problems that may confront operators as they interact with this new excavator interface. Traditional excavators usually use levers and pedals as the interface for operator control. However, with advances in computing power, it is possible to incorporate force feedback, or haptics, into the operator interface. The haptic interface is expected to provide force feedback to operators to give a sense of 'feel' to operators as they interact with the excavator through the use of the haptic Phantom device and, therefore, assist operators in performing their tasks more efficiently and effectively. This research aims to identify potential usability problems that may confront users, and to provide appropriate design suggestions to the design team. Results from the study showed that, users find the coordinated excavator controller to be intuitive, easy to learn and easy to use. Several usability issues were also identified, and appropriate design modifications were recommended