This is a control system that manages a process defined by a series of tasks to be performed i.e. a sequence of operations, one after the other. Each operation in the sequence is performed either for a certain period of time (in which case, it is time-driven), or until the task is finished e.g. as indicated by a limit switch (in which case it is event-driven).
A time-driven sequence is open loop because there is no feedback while an event-driven task is closed loop because feedback signal is required to specify when the task is finished.
A typical example of a sequentially controlled system is the automatic washing machine. The first event in the wash cycle is to fill the tub with water. This is an event-driven task because the water is admitted till it gets to the proper level as indicated by a float and limit switch (i.e. a closed loop). The next two tasks, wash and spin drain, are each done for a specified period of time and are time-driven events i.e. open loop.
You can also read: What is Motion Control?
An Expert’s Guide to EV Load Management and NEC Compliance Smart EV charging control architectures…
Frequent power failures due to severe storms, aging grid infrastructure, and other unpredictable natural disasters…
The rise of smart devices and the Internet of Things (IoT) has revolutionised the way…
Battery technology has become essential to the global transition to sustainable energy, fundamentally changing transportation…
Hydraulic systems are built in such way that they are able to move large loads…
Image source: Unsplash Innovation in aerospace engineering is accelerating, driven by rising demands for safer,…
