What is a mechanism?
A combination of rigid and/or flexible bodies connected to do work with definite constrained relative motions.
What does external analysis study relative to the object of interest?
The environment outside the object's boundaries.
Which elements does external analysis identify?
The global function, environment, study boundaries, input/output parameters, and operating phases.
What distinguishes a structure from a mechanism?
A structure does not do work, and its parts have no relative motion.
How is a system’s degree of freedom defined?
The number of independent parameters needed to define its position uniquely at any instant.
How many degrees of freedom does a rigid object have in three-dimensional space?
Six: three translations and three rotations.
What is a link in a mechanism?
A rigid individual mechanism part connected to other links to transmit motion and forces.
What sequence does kinematic analysis follow, from operating phase to motion analysis?
Define the operating phase; identify input and output; define groups; graph non-movement relationships; then identify relative motions and joints between group pairs.
How many joints does a simple link contain?
Two joints.
Which joint types does the course name?
Complete or embedding, cylindrical, turning or revolute, sliding, helical, planar, spherical, edge slider, sphere groove, and point slider.
Answer 10 questions on Mechanism Kinematic Analysis.
1. Which statements characterize a mechanism?
2. Kinematics concerns the geometry of motion. Which quantities or characteristics fall within its scope?
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