Slosh Control


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There are numerous applications where slosh (liquid oscillation) is problematic, such as the packaging and metal industries, space vehicles, and tanker trucks. The liquid motion can induce structural vibration, it can spill, or the system can go unstable. Input shaping generates specially-shaped commands to move the system without inducing slosh.

To demonstrate input shaping, the experimental setup shown above was assembled. The container of water (dyed blue) was moved by a portable bridge crane. Unshaped and input-shaped commands were tested. The camera recorded video of the sloshing liquid. The residual slosh amplitude was recorded using an image-processing algorithm. Testing showed that input shaping can reduce residual slosh by over 80%.


Collaborators: Brice Pridgen, Kun Bai, and William Singhose