William Enns-Bray, Mitchell Sharpe, Michael Kryski, Andrew Mattson, Nicole Marshall, Ashton Johnson Sponsor: Dr. Bertram Design Review 1

Design Goal To design a wearable experimental apparatus that shifts the centre of mass of a subject. The device will involve a mass of 2 kg oscillating at a frequency of up to 4 Hz with a full cycle amplitude of 8 cm. Normal motion should not be affected when device is worn and not turned on.

Functional Objectives Oscillate a 2 kg mass Amplitude of 8 cm Frequency of 4 Hz Adjust mass so that it sits on test subjects centre of gravity Adjustable device to fit most body types

Rack & Pinion Mechanism 3 major components: Rack, Pinion, Motor Mobile Motor vs. Fixed Motor Modular vs. Integrated design

Double Slider Mechanism Rotating arms to raise and lower mass Dual motor or single motor configurations Motors reverse direction to create oscillation Vertical guide to keep mass centered / level Controlled by monitoring arm angle.

Crank-Slider Mechanism Modification of classic 4-bar mechanism Converts angular motion to linear motion

Cam Profile Force-closed or Form-closed Design Different cam profiles can be cut to achieve different types of motion i.e (Harmonic, Cycloidal etc.) Mass attached to roller follower Follower slides vertically with respect to mounting bracket

Next Steps Motor/Actuator Research Attachment System & Ergonomics Control Systems Possibly Reassess Functional Objectives

Thank you! From Team BALTE