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Quantitative Analysis of Various Sail Luffing Sensing Methods

Last modified
Monday, December 21, 2020 - 16:13
In Clare Boothe Luce Undergraduate Research Scholars

Description

Prior research has shown piezoelectric vibration sensors can detect sail luffing, the acceleration of a flexible sail out of its normal wing state caused by a momentary reversal of the air pressure gradient over the sail. Luffing decreases boat performance by reducing the lift generated by the sail. Yet detecting sail luffing in flexible sails for robotic sailboats is still challenging. This paper presents three methods of sensing characteristics of a luff – air pressure differential which causes the luff, the acceleration of the sail as the luff occurs, and the influence of motion and acceleration of a luffing sail on members placed on the sail. We assess three different sensor types based on cost, ease of use, complexity of electrical interface, power consumption, accuracy of the sensor and amount of noise in sensor readings. To classify the most effective sensor for a given set of constraints, a multifaceted analysis has been performed with a piezoelectric vibration sensor, an acceleration sensor, and a gas pressure sensor. The accuracy and precision of each sensor at sensing sail luffing is evaluated by comparing the sensor output with a plot of the position of a single point on the sail through time generated with computer vision.

Type of Resource

Article

Rights Statements

In Copyright - Educational Use Permitted
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A Computational Approach to Working Memory

Last modified
Wednesday, August 12, 2020 - 15:24
In Clare Boothe Luce Undergraduate Research Scholars

Description

Working memory is the memory that is stored briefly and manipulated. We use it to read sentences, do math problems, and remember what a room looks like when we look away. This type of memory is severely impaired for individuals with ADHD. Working memory deficit is identified as the core cause of ADHD. Working memory deficits are correlated with poor academic performance.

Type of Resource

Article

Rights Statements

In Copyright - Educational Use Permitted
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Object Type

  • Article (2)

Collection Membership

  • Clare Boothe Luce Undergraduate Research Scholars (2)

Agents

  • (-) Show all (2)
  • Bennett, Andrew (1)
  • Murray-Davis, Halie (1)

Subject

  • Show all (3)
  • Working Memory (1)
  • (-) Clare Boothe Luce (2)

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  • March 2018 (2)

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Olin College of Engineering

An undergraduate engineering institution exploring innovative approaches to engineering education since its founding in 1997.

1000 Olin Way
Needham, MA 02492
781.292.2390