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Servomotors are widely used electro-mechanical components. For example, they are used in steering systems for scale model helicopters and other radio controlled cars, robots, and aircraft, including military "drones". A servomotor includes an electric motor, circuitry to control its speed and direction, and gearing to attain the high torques needed to apply moderately large forces over relatively short linear displacements. The gearing inside this servo is a compound gear train with four stages. In this video, we will understand how linear algebra can help us to predict the losses and understand the design trade-offs when converting high speeds and low torques into low speeds and high torques using a gear train. This video is part of the Linearity Video Series. Many complex systems are modeled or approximated linearly because of the mathematical advantages. Hi, my name is Dan Frey, and I am a professor of Mechanical Engineering and Engineering Systems at MIT. Be...

the other method we've used we're trying is uh seepage meters any of you guys familiar with secret meters did you work with uh emily and uh all too familiar with seafood meters uh you know basically it sort of makes sense when you think about it we're not interested in concentration as much as we are in flux total mass coming in per year amount of water and that's hard to measure in groundwater as you probably personally experienced okay so what they've come up with are these things called seepage meters uh david lee and a few others came out designed them uh first in canada some years ago and um the idea being that you find some sort of a way to have a funnel or something you can put on the pond bottom and the groundwater that would be discharging the leg goes through that first and you can capture it and measure the rate okay that's a wonderful i that's that's that's the simple explanation everything after that gets to be complicated ...