Week 13

This week we learn about operating principles & mechanism designs. We learned that all devices, apparatus and equipment are designed based on working principles that are either mechanical, electrical, chemical or magnetism. For example,  the separation principle behind distillation is the difference in relative volatility and steam traps operate on the principle of specific gravity. We hand to come up with the principles of what our chemical product is based on. Since our chemical product is a cooling backpack, our chemical product is based on the principles of specific heat capacity and temperature difference.

Next, we learned about mechanism enables & enhances principle. We learned that in order for the identified operating principle to work efficiently, mechanical movements are often required. Engineering mechanism is it is something that transforms forces and movement into a desired set of output forces and movement.

The 6 Essential Mechanism in functional prototypes are:

  • Actuators - Converts stored energy into motion. 
  • Cams - Convert the rotation of a shaft into simple or complex reciprocating linear motion.
  • Gears - Transmit torque and to adjust rotational velocity. 
  • Lever - Transmit and amplify force by fixing the input and output about a fulcrum or pivot point.
  • Ratchets - They lock in one direction, allowing them to tighten without fear of literally "going backward." 
  • Spring - Store and dissipate energy. 






Next, we have to design a Ping Pong (table tennis) Ball launcher that can shoot and reload ping pong balls.

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