Specifications

CT Corsair Final Report May 2, 2014

This equation states that for every 10° θ travels, the platform will have rolled a distance

represented by . The equation was multiplied by the required roll rate of 81°/sec. Roll rates

based on are displayed in Table 1-3 in Error! Reference source not found.. The greatest

angular velocity was chosen from Table 1-2 (also in Appendix 3) to be 85 RPM. As a result, the

simulator requires a gearbox-motor combination that operates at 85 RPM.

5.6 Horsepower Requirements

To calculate the power requirements of the motors the following calculations were performed

using system specifications from Table 3.

To calculate the necessary motor input speed:

(Equation 13)

The gear ratio was calculated using:

(Equation 14)

Where is speed. Input torque was evaluated using the calculated torque output and the gear

ratio.

(Equation 15)

Finally, the horsepower requirement was calculated using:

(Equation 16)

Since 4.7hp is not a standard motor size, the number was rounded up to 5hp.

6. Prototype

6.1 Purpose of Prototype

The team constructed of a small scale, inexpensive 3-axis motion servo motor prototype using

hobby servo motors. Its purpose was to serve as a test bed for the Arduino sketch code used for

motor control, and to gain experience in programming using positional feedback control in a

low-risk environment. These small servo motors communicated with the microcontroller using

simple analog IO and provided feedback from their internal encoders. The Moog motor drive

used in the final design also communicates with the microcontroller using this analog IO and

encoder feedback. Thus, while waiting for the shipment of the servo motor this prototype

provided the team with a means to get a head start on the code development.