What is the main characteristic of a servo system when controlling motion?

The main characteristic of a servo system when controlling motion is continuous feedback. This feedback loop is vital as it allows the system to monitor and adjust the motion of an object in real-time. By continuously assessing the position, velocity, and other relevant parameters of the system, the servo can make necessary adjustments to maintain precise control over motion, ensuring that the desired performance is achieved.

Continuous feedback is integral for maintaining accuracy and efficiency in tasks such as robotics, CNC machines, and various automated systems. It enables the servo to respond dynamically to changes in the environment or variations in load, which is essential for achieving high levels of precision and reliability in motion control. In contrast, other characteristics like manual intervention or simple adjustments do not provide the level of sophistication and adaptability required for effective motion control in servo systems.