Here Is A Semester Project In The 2012 Mechatronic Control Systems Engineering Module At San Jose State

Here is a semester project in the 2012 Mechatronic control systems engineering module at San Jose State University. This is a Proportional-Integral-Derivative controlled (PID), 6 degree of freedom (6-DOF) Stewart platform, which basically means it has six axes on the top plate. This prototype uses 6 radio controlled servo motors instead of the traditional use of hydraulic jacks or electronic actuators. (this video has sound)

Proportional-Integral-Derivative:

A PID controller continuously calculates an error value as the difference between a measured process variable and a desired setpoint. The controller attempts to minimize the error over time by adjustment of a control variable, such as the position of a set of servo motors or actuators, to a new value, given by a weighted sum:

where Kp ,Ki , and Kd, all non-negative, denote the coefficients for the proportional, integral, and derivative terms, respectively (sometimes denoted P, I, and D).

P accounts for present values of the error , and is determined by the direction and magnitude the correction needs to be applied (e.g. if the error is large and positive, the control variable will be large and negative),

I accounts for past values of the error (e.g. if the output is not sufficient to reduce the size of the error, the control variable will accumulate over time, causing the controller to apply a stronger action through P), and

D accounts for possible future values of the error, based on its current rate of change. This part determines when and at what rate it needs to reduce the magnitude of its action, e.g as the ball fast approaches the desired set point at the centre of the plate.

[source]

These Geometric Tarts Turn Patisserie Into Architecture.

Pastry chef Dinara Kasko uses sheets of chocolate to create stunning edible treats. See more at Dinara Kasko | José Margulis.

Ultra-thin sheets of chocolate are transformed into topographic works of art that taste just as good as they look. The project is a result of a collaboration between architect-turned-pastry chef Dinara Kasko and Miami-based artist José Margulis.

Margulis, who works with geometric abstractionism and kinetic art, created the initial patterns of what would eventually become edible sheets of chocolate using colorful 3D plastic sheets. Margulis focused on curved shapes with various volumetric geometries, transparencies and intense colors to create a rich, layered effect.

“Margulis’s utmost concern is the creation of geometric shapes conceived mostly by changing the perspective of the viewer accompanied by the philosophical notion that everything in life has diverse levels of narrative and spatial perceptions,” wrote Kasko in a blog post.

The chef then took Margulis’s initial designs and transformed them into edible treats using various cutting machines and tools to create 3D chocolate layers. These layers were then placed on top of four different flavored tart cakes, including blackberry-blueberry and cherry confit almond sponge cakes.

“I was transforming the object of art into something edible that would later perish, while emphasizing the ephemeral art, its fleetingness in our life,” said Kasko. “The appearance and, of course, the taste should leave a lasting impression and expand observer’s boundaries of what ‘cake’ can be. I like to surprise people.”

Shared from MATT VITONE at psfk.

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CHECK OUT this unraveling spiral –> the most compelling global warming visualization ever made

“The pace of change is immediately obvious, especially over the past few decades.” - Climate Scientist, Ed Hawkins (via GIPHY)

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Just lying here in waiting for the mold makers. The full-size Triceratops from Jurassic Park, sculpted in clay at Stan Winston Studio, lead artist Joey Orosco. 🦕 #jurassicpark #dinosaur #triceratops #ttops #stanwinstonstudio #behindthescenes #practicaleffects #specialeffects #hollywood #moviemagic #clay #sculpture #model #dinomania #dinomaking #blockbuster https://ift.tt/2FU6ysO

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David Maitland, Feltwell, United Kingdom

Subject: Coral sand Technique: Brightfield Magnification: 100x

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Via Peyton Thomas

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Art By IG: @bryanthegirl Instagram: @artwoonz

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‪From @park_kkone: “Benny and Berry❤️ Father and daughter👨‍👧💕#fatherslove‬ ‪.‬ ‪베니와 베리❤️ 아빠와 딸👨‍👧 #딸바보 베니💕” #catsofinstagram ‬ [source: https://ift.tt/2NbX0xg ]

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INKTOBER DAY 13 To 21!!! #21 DRAIN #20 BREAKABLE #19 SCORCHED #18 BOTTLE #17 SWOLLEN #16 ANGULAR #15

INKTOBER DAY 13 to 21!!! #21 DRAIN #20 BREAKABLE #19 SCORCHED #18 BOTTLE #17 SWOLLEN #16 ANGULAR #15 WEAK #14 CLOCK #13 GUARDED

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Extremely Rare Fossil Turtle - Green River Formation, Rocky Mountains, USA

Fossil turtles from the Green River Formation are extremely rare. This is a well preserved, fifty million-year-old Trionyx softshell turtle in limestone. It was found in the upper layers of the F-1 Green River Formation. The stone also contains 9 small Knightia eocaena and a small Diplomystus dentatus.

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