Specifications

CT Corsair Final Report May 2, 2014
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Figure 21. Autodesk Inventor model of cam (green), pushrod (red), and platform (blue) relationship
Figure 20. Plot of relationships between , and
As with the previous calculation, it is important to note that the angles do not vary linearly with
each other. To understand the relation between , , , and a 3D model was created of just the
cam, pushrod, and platform. Figure 21 shows this model with green representing the cam, red
representing the pushrod, and blue representing the platform. The model again used 10° intervals
between -100° and 90° for . For each , the angles , , and were recorded. Each of these
angles were plotted against in Microsoft Excel, and curve fitting was done to establish
relationships between and the other three angles. This relationship is shown in Figure 20.
Additional MATLAB code was written to determine the torque based on any given . Figure 22
shows the torque curve for the range of from -100° and 90° which shows that maximum torque
occurs when =27° with a value of 3484.1 in-lbs. The max torque does not occur when =0° due
to the addition of the spring force. The further the simulator pitches and rolls, the higher the
torque the motor receives from the cam.
Figure 22. Plot generated using MATLAB shows torque calculated at each θ. The max torque occurs at θ=27°