Mechatronics System Design

Electrical Driven Actuator Elements

a$)$ Draw a simplified sketch for the system.

b$)$ Draw the trapezoid motion profile for both load $\backslash$& motor $($Speed Vs time for one complete cycle$)$

c$)$ Calculate the maximum $($initial$)$ torque.

d$)$ Make a preliminary selection for an electrical motor $($ Consider NEMA Standard$).$

e$)$ Calculate the corresponding torque for:

$-$ acceleration $($Tacc$),$

$-$ Run $($Trun$),$

$-$ Deceleration $($Tdec$)$

$-$ Standby $($Tss$)$

$-$ Root Mean Square torque $($Trms$).$

$-$ Load Current corresponding to each torque.

f$)$ Improve the motor selection, if needed.

g$)$ Repeat all calculations in e$)$ for the new selection.

h$)$ Give your comments.

A spindle drive is required for a disc memory tester. The spindle inertia $($a cylinder$)$ is $\backslash (5\mathrm{.}4^\{*\}10^\{*\}\backslash )\backslash (\{\}^\{4\}\backslash$mathrm$\{$Kg$\}.\backslash$mathrm$\{$m$\}^\{2\}\backslash ).$ There is a maximum load torque during rotation of $\backslash (0\mathrm{.}0720\backslash$mathrm$\{$~N$\}.\backslash$mathrm$\{$m$\}\backslash )$ opposing the rotation. The spindle will be accelerated and decelerated between $0$ and $3000$ rpm in $0\mathrm{.}5$ s $,$ run for $5$ s and rest at $0$ velocity for $5$ s $,$ per a trapezoidal profile. A coupling$/$shaft assembly will be used to connect the motor to the spindle, with a total bearing torque of $\backslash (0\mathrm{.}0144\backslash$mathrm$\{$~N$\}.\backslash$mathrm$\{$m$\}\backslash )$ and inertia of $\backslash (0\mathrm{.}72*10^\{-5\}\backslash$mathrm$\{$~kg$\}.\backslash$mathrm$\{$m$\}^\{2\}\backslash )$

Hint: You can consider the following:

$-$ Selection$\backslash$#$1$

$-$ Selection$\backslash$#$2$