MEG 320

Spring 2001

Project 2

The figure below shows a concept for an elliptic exercise bike (click here to see animation of the motion). The height of the slide can be varied between 0.1 m and 0.6 m to change the difficulty of the exercise. The dimensions of the bike, as shown in the figure below, do not necessarily produce an acceptable performance.

Using your modified design of Project #1. Assume that the upper body does not move. The following are suggested steps:

i. Identify loops

ii. Identify input motion.

iii. Derive the displacement equations for all loops of the machine.

iv. Derive the displacement equation for the critical points in the machine such as knee, hip, etc.

v. Write a program, preferably in Mathcad, to simulate the displacement of the machine.

vi. Use your program to plot the motion of the machine and the user at both extremes of the motion.

vii. Use Working Model to verify your program. (Click here to load the Working Model file)