Which of the following is a common characteristic of digital control systems?

Digital control systems are characterized by the use of discretized signal processing. Unlike analog control systems, which process continuous signals, digital control systems operate on signals that have been sampled and converted into a digital format. This means that the continuous-time signals are represented as a sequence of discrete values, allowing for digital manipulation and processing.

Discretized signal processing enables the use of digital controllers that can implement complex algorithms and compensate for system dynamics more effectively than their analog counterparts. This shift to digital processing is also essential in modern control applications as it facilitates integration with computer systems, enhances precision, and allows for easier implementation of control strategies.

In contrast, processing analog signals, operating in continuous time, or directly manipulating actuators are characteristic of analog systems rather than digital ones, making the choice of discretized signal processing the defining feature of digital control systems.