One of several fail-safe systems incorporated into a roller coaster design uses the following safety protocol. Before a roller coaster car brake can be released to allow the roller coaster to commence its ride, ALL of the following conditions must be met: A logic gate schematic is shown. --- 5 WORK AREA LINES (style=lined) --- --- 0 WORK AREA LINES (style=lined) ---
\hline
\rule{0pt}{2.5ex} \textit{Safety harnesses} \rule[-1ex]{0pt}{0pt} & \textit{Track} & \textit{Ride gates are} & \textit{Operator} \\ \textit{secure} & \textit{is clear} & \textit{locked} & \textit{warning light} \\
\hline
\rule{0pt}{2.5ex} 0 \rule[-1ex]{0pt}{0pt} & 0 & 0 & \\
\hline
\rule{0pt}{2.5ex} 0 \rule[-1ex]{0pt}{0pt} & & & 1 \\
\hline
\rule{0pt}{2.5ex} 0 \rule[-1ex]{0pt}{0pt} & 1 & 0 & 1 \\
\hline
\rule{0pt}{2.5ex} 0 \rule[-1ex]{0pt}{0pt} & & & \\
\hline
\rule{0pt}{2.5ex} 1 \rule[-1ex]{0pt}{0pt} & 0 & 0 & 1 \\
\hline
\rule{0pt}{2.5ex} 1 \rule[-1ex]{0pt}{0pt} & & & 1 \\
\hline
\rule{0pt}{2.5ex} 1 \rule[-1ex]{0pt}{0pt} & & & 1 \\
\hline
\rule{0pt}{2.5ex} 1 \rule[-1ex]{0pt}{0pt} & 1 & 1 & \\
\hline
\end{array}
ENGINEERING, PPT 2018 HSC 21b
Outline the benefits of using electric motors to power self-driving vehicles. (3 marks)
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ENGINEERING, PPT 2018 HSC 21d
Digital logic controls a self-driving vehicle's brakes.
Brakes will be applied when all of the following conditions are met:
-
- the motor is on
- the vehicle is in motion
- either sensor 1 or sensor 2 is activated.
Explain how the logic gates, labelled 1, 2 and 3 in the circuit below, control the vehicle's brakes. (3 marks)
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ENGINEERING, PPT 2018 HSC 21a
The diagram shows a self-driving electric vehicle.
Innovations in global positioning systems (GPS) and sensor technologies are used in the operation of this vehicle.
Describe how both of these innovations are used in the control of the vehicle. (3 marks)
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ENGINEERING, PPT 2021 HSC 25a
Control technologies are used in modern vehicles.
Outline the basic principle behind the operation of ONE of these technologies. (2 marks)
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