Reference no: EM133037352

MECE 3270U Kinematics & Dynamics of Machines - University of Ontario Institute of Technology

SCOPE
Suggest a simplified model for ONE of the nine mechanical systems listed in section 3, design the mechanism(s) and determine the appropriate link lengths. You are required to determine the proper concept and functionality of your design and provide dimensions.

Determine the degree of freedom and plot the trajectory of all links.

Use NX software or SolidWorks software to animate the mechanism motion from the closed position to the fully open position. Your model should provide a precise motion and allow you to explain the intended motion of the mechanism(s) you have designed and the interaction of parts.

Write a two-page report with a brief introduction, objectives and a detailed description of the designed mechanisms and your calculations. Cite references where appropriate.

1. Variable Stoke Engine

Variable Stoke Engine is a piston engine (gasoline) with an adjustable stroke that may be adjusted whilst the engine is running. When a change in compression ratio is needed, the drive turns and moves the actuator arm. The actuator arm rotates the control shaft. As the control shaft rotates, it acts upon the lower-link, which changes the angle of the multi-link The multi-link adjusts the height the piston can reach within the cylinder, this changing the compression ratio.

Select the links lengths and create the model.
Determine the degree of freedom and plot the trajectory at the tip of the cylinder.
Animate the mechanism motion for the piston.

2. Aircraft Landing Gear

The figure shown below is for an aircraft landing gear mechanism. Design a similar mechanism with a tire diameter of 30 cm, rOA = 66 cm, and rOD = 53 cm. The position can be modeled by the translation joint.
For the actuator in sine function, select the link length such that the landing gear can be stowed inside the fuselage.
Plot the trajectory at the tire center and the time response of all links.
Animate the mechanism motion from the stowed to deployed position..

3. Vehicle's Spoiler

The spoiler in a race-car is shown below. Design a similar mechanism and determine the followings:
Select the link length and create the model.
Plot the trajectory at the tip of link 6 and the time response of all links.
Animate the mechanism motion from the fully retracted to elevated position.
From mechanics view point, discuss the difference should one use link 2 and 4 as the driving link.

4. The Convertible Top Mechanism

A convertible top mechanism of a vehicle is shown below. Design a similar mechanism and determine the followings:
Select the link length and create the model.
Determine the degree of freedom and plot the trajectory at the tip of the convertible top.
Animate the mechanism motion from the stowed to deployed position.

5. Rear Suspension

A typical automative rear suspension is shown below. Suspension is the system of tires, tire air, springs, shock absorbers and linkages that connects a vehicle to its wheels and allows relative motion between the two.

Select the link length and create the model.
Determine the degree of freedom and plot the trajectory.
Animate the mechanism motion.

6. Casement Window

A casement window must open 90° outward from the sill and be at sufficient distance from one side to satisfy the egress codes and from the other side to provide access to the outside of the window pane for cleaning.

Select the links lengths and create the model.
Determine the degree of freedom and plot the trajectory of the window during its motion while opening or closing.
Animate the mechanism motion from fully closed to fully open position.

Select the links lengths and create the model.
Determine the degree of freedom and plot the trajectory of the machine during motion between two extreme positions.
Animate the mechanism motion for each motion cycle.

7. Prosthetic knee joint using six-bar mechanism

Four-bar mechanisms have been broadly utilized as the mechanism of choice in the prosthetic knee in the past years. In comparison to the four-bar mechanisms, the mechanisms with six bars (six-bar mechanism) are more flexible due to having more design variables so that they can be successfully used instead of four bar mechanisms to generate the required knee motion. Based on the two basic configuration of six-bar mechanisms (Watt type and Stephenson type) as shown on the left, the knee joint has four configurations on the right.

Design a similar mechanism and determine the followings:
Select the link length and create the model.
Determine the degree of freedom and plot the trajectory of the ankle joint.
Animate the mechanism motion during walking.

8. Wing flaps
The figure below depicts the aileron flaps mechanisms on a) Boeing 787 and b) Airbus 320. Select one model and design a similar mechanism and determine the followings:
Select a link length and create the model.
Determine the degree of freedom and plot the trajectory at the tip of the aileron.
Animate the mechanism motion the closed position to fully open position.

Attachment:- Project - Dynamics of Machines.rar