Work Description

Date: 12/05/2022 Dataset Title: Flywheel Energy Storage System Roll Dataset Dataset Creators: Nathaniel Clemett, Matthew Collette, Benjamin Simmons Dataset Contact: nclemett@umich.edu Funding: N00014-18-1-2656 Key Points: Active stabilization was able to reduce the amplitude of vessel roll by up to 84%. Passive stabilization reduces roll further than the actively stabilized mode. However, without a control scheme, waves can roll the vessel, and the flywheel will attempt to hold that angle. Research Overview: Using an inertial measurement unit to measure roll of a vessel in degrees, a model Tumblehome was placed in the Marine Hydrodynamic Laboratory's model basin. The model was softly restrained in the tank to observe beam-to waves. Varying tests were performed with the Flywheel on and off to observe different stabilization effects. Static roll decay tests were also performed. Methodology: To produce this dataset, three modes of the flywheel were tested. The first was with the flywheel off, which produced a baseline for roll without stabilization. The second mode was active stabilization with the flywheel spinning. An inertial measurement unit (IMU) onboard took in roll in degrees. An Arduino uno used the roll angle to precess the flywheel to a degree that countered the roll. The last mode was passive stabilization with the flywheel on. Here, the precession belt was removed which allowed the flywheel to freely precess and counter the moment generated by the roll. Instruments: MPU-6050 (IMU) Files contained here: Included in this repository are the 43 rounds of clean IMU roll data from testing in the model basin. This cleaned data does not include the waiting time before the waves have been generated, or the ramp up and wind down waves generated by the wave maker while building to desired amplitude. Included are 15 videos of testing in the tank. The number corresponds with the testing round. Camera location was placed in multiple different orientations throughout testing. Unique files are described below. - Flywheel_Testing.csv: Test matrix of testing in the model basin. Run number correlates with video and data. Includes wave parameters such as frequency, amplitude, and duration as well as flywheel rpm. Notes for each run are also included if taken. - FlywheelCode.zip: Folder contains code to run the flywheel in an actively stabilized state. To run in passive mode, the belt was removed from the precession motor to the flywheel. - ActiveResponse.mp4: video highlighting the flywheel active response when manually rolling the vessel. - PassiveResponse.mp4: video highlighting the passive response (belt off) when manually rolling the vessel. - Roll_tank_on##_cleaned.csv: ## ranges from 01 to 03. Roll decay tests were performed with the flywheel in active stabilization mode. - Roll_tank_passive##_cleaned.csv: ## ranges from 01 to 03. Roll decay tests were performed with flywheel in passive stabilization mode. - off30_test01_cleaned.csv: Roll decay test with flywheel off. Vessel rolled to 27 degrees before release. - active30_test01_cleaned.csv: Roll decay test with active stabilization. Vessel rolled to 26.4 degrees before release. - off40_test02_cleaned.csv:Roll decay test with flywheel off. Vessel rolled to 35.6 degrees before release. - active40_test02.csv: Roll decay test with active stabilization. Vessel rolled to 31.77 degrees before release. - off45_test3_cleaned.csv: Roll decay test with flywheel off. Vessel rolled to 42.5 degrees before release. - active45_test093_cleaned.csv: Roll decay test with active stabilization. Vessel rolled to 41.27 degrees before release. - RollDecay_Off.MP4: Roll decay test in the model basin with the flywheel off. - RollDecay_Passive02.MP4: Roll decay test in the model basin with the flywheel in passive stabilization mode. Use and Access: This data set is made available under a Creative Commons Public Domain license (CC0 1.0). Related Publications: Collette, Housner, van Houten, Rohrer, Clemett, Simmons. Exploration of Platform-Level Impacts of Flywheel Energy Storage. Forthcoming. To Cite Data: Clemett, N. M., Collette, M. D., Simmons, B.�(2022).�Flywheel Energy Storage System Roll Dataset�[Data set], University of Michigan - Deep Blue Data.�https://doi.org/10.7302/752y-0z55