The Role of Taxonomy and Ontology in Semantic Layers - Heather Hedden.pdf
003 position analysis
1. Position Analysis Lecture Notes Reference: Machines and Mechanisms Applied Kinematics by David H. Myszka
2. Position and Displacement The position of a point on a mechanism is the spatial location of that point. Displacement is the end product of motion. Linear displacement is the straight line distance between an original position of a point on a mechanism and some later position. Angular displacement is the angular distance between two positions of a rotating link. Reference: Machines and Mechanisms Applied Kinematics by David H. Myszka
3. Position Analysis Graphical Analysis Analytical Analysis Reference: Machines and Mechanisms Applied Kinematics by David H. Myszka
4. Example 1: The figure shows a toggle clamp used to securely hold parts. Graphically determine the displacement of the clamp surface as the handle rotates downward 15o. Reference: Machines and Mechanisms Applied Kinematics by David H. Myszka
5. Graphical Analysis Reference: Machines and Mechanisms Applied Kinematics by David H. Myszka Using CAD software: The displacement of point C is 11.62 mm
8. Limiting Positions The configuration of a mechanism that places one of the follower links in an extreme position is called a limiting position. Graphical Analysis Analytical Analysis Reference: Machines and Mechanisms Applied Kinematics by David H. Myszka
9. Example 2: The figure shows a linkage that operates a water nozzle. Determine the extreme position of the mechanism that places the nozzle in extreme positions. Reference: Machines and Mechanisms Applied Kinematics by David H. Myszka
10. Graphical Analysis Reference: Machines and Mechanisms Applied Kinematics by David H. Myszka Using CAD software: The angular displacement of link 4 is 47o
