Higher Engineering Science Practice Questions - Higher Engineering Science (Qualifications Scotland SCQF Level 6) Exam

A closed-loop system uses feedback from a sensor to compare the actual output against the desired input, whereas an open-loop system has no feedback. An open-loop system uses operational amplifiers, whereas a closed-loop system uses microcontrollers exclusively. A closed-loop system operates only with digital signals, while an open-loop system operates only with analogue signals. An open-loop system continuously adjusts output to compensate for environmental changes, while a closed-loop system follows a fixed timer.