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CATS Seminars – Past Seminars, Fall 2005
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Current Seminar Schedule
Past Seminars
navigation icon Fall 2005
navigation icon Springl 2006

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September 14, 2005, 1:00pm-2:00pm, CII 3051
Piezoelectric Motors and Actuators
Acrobat PDF | Video of ultrasonic piezo motor, quick time plug-in required

Professor Shep Salon, ECSE Dept., RPI and President, Magsoft Inc.

This talk provides an introduction to the use of piezoelectric material in the design of motors and actuators. The basic operation of piezoelectric devices is reviewed and a brief history of their applications is presented. The equations used in the computer representation of the devices are presented along with examples of motors and actuators that have been built. A discussion of the advantages and disadvantages of piezoelectric devices concludes the talk.

Refreshments served

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November 2 , 2005, 4:00pm-5:00pm, JEC 3117 (Joint CATS/ECSE Seminar)
Distributed Sensors and Environmental Robotics
environmental robot

Professor Arthur C. Sanderson, ECSE Dept., RPI

Distributed sensor networks are increasingly important for observation and monitoring of both natural and artificial environments. These systems have direct relevance to environmental, health, security, and defense applications. Such networks require sensors and mobile platforms that may extend into large scale complex, dynamic environments over long periods of time. In our current research, we explore the development and deployment of sensor networks for monitoring biological, chemical and physical properties of environmental systems, including salinity distribution, dissolved oxygen, sediment and contaminant transport and migration of biological species.

A solar-powered autonomous underwater vehicle (SAUV) has been developed (in collaboration with the Autonomous Undersea Systems Institute). This robotic vehicle integrates control and communication with efficient energy utilization and solar recharging for long-term deployment. The SAUV recently demonstrated 90 hours of deployed time in a five day period, recovering data on physical and chemical parameters of a fresh water lake. Other recent experiments have included monitoring of dissolved oxygen in a tidal estuary, and communications and control among three AUV systems.

Research in environmental robotics poses fundamental algorithmic issues of mission planning and adaptive sampling in order to guide the selection and repositioning of mobile sensing nodes and the optimal estimation of parameters of distributed variable field models. These topics are approached using information measures of prediction error to guide autonomous deployment of the SAUV vehicles. Iterative adaptive sampling methods have been demonstrated to provide model estimation with efficient use of sensing resources and vehicle navigation. A second area of research in engineering systems addresses the selection of network protocols and routing methods subject to power and bandwidth constraints among multiple vehicles. Multiobjective evolutionary search algorithms have been explored for this application.

A major focus of current studies is on river, estuary, and coastal environmental domains, particularly the Hudson River and Estuary in New York State. Current research includes collaboration with the Center for Ocean Technology, College of Marine Science, at the University of South Florida.

Refreshments served at 3:30 pm

 

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