Author(s): Carter Stentzel, Andrew Geyser, Heather Leany
Mentor(s): Ivy Running, Brian Jensen
Institution BYU
This research investigates the application of bistable mechanisms for actuating origami-inspired designs. Bistable mechanisms exhibit two equilibrium positions that allow a more efficient motion without a continuous force input. These mechanisms are used in many applications where two distinct positions are needed such as switches, valves, and clasps. Origami designs can benefit from a bistable mechanism to maintain their deployed and folded configurations without an external force holding them in place. This enhances the stability and durability of the design while reducing energy consumption for storage and deployment. Bistable compliant mechanisms also benefit from reduced part count, ease of manufacturability, reduced wear, and the ability to hold either stable position without requiring exterior forces. In order to streamline the application of bistable mechanisms into future designs, models will be created showing the kinematics of structures using these mechanisms to actuate. An analysis of the range of motion vs the range of input of different mechanisms defines the size and strength of energy well of each stable position, which shows how much energy can be effectively utilized by the mechanism, and allows classification of each mechanism. Through this analysis, torsion bar springs and magnetic joints show potential. Modelling will begin with those respective mechanisms and allow for design parameter modification to test potential in various applications. These models will then be compared with prototype testing to ensure model fidelity. This approach demonstrates the great potential for bistable-compliant mechanisms applied to origami designs in fields such as deployable structures, aerospace applications, and robotics, where lightweight, low energy consumption, and adaptable structures are important.