In robotics, which statement best characterizes a servo-controlled robot with closed-loop feedback?

Introduction / Context: Robots can be classified by control method. Point-to-point (non-servo) robots move between taught positions without controlling the path in between. Servo-controlled robots use closed-loop feedback (from encoders, resolvers, etc.) to regulate position, velocity, and acceleration along a trajectory.

Given Data / Assumptions:

• Feedback sensors report joint states in real time.
• Controllers command continuous motion profiles, not just end stops.
• Actuation may be electric, hydraulic, or pneumatic, independent of being servo-controlled.

Concept / Approach: Servo control implies a control loop that adjusts actuation based on error between commanded and measured states. This enables smooth trajectories, controlled acceleration/jerk, and contouring (continuous-path control) useful for welding, painting, or milling with robotic arms.

Step-by-Step Solution: 1) Identify the hallmark of servo systems: closed-loop feedback. 2) Translate that into motion capability: controlled acceleration and path following. 3) Note that servo control does not mandate a specific power medium. 4) Select the option describing continuous, feedback-driven motion.

Verification / Alternative check: Vendor datasheets cite servo control enabling contouring with specified velocity/acceleration limits, confirming the capability to accelerate/decelerate under feedback.

Why Other Options Are Wrong: Option A: Describes non-servo point-to-point behavior.
Option C/D: Servo control is independent of hydraulic or electric actuation; both can be servoed.
Option E: Not applicable since a correct description is provided.

Common Pitfalls: Equating servo with only electric motors; hydraulic servo valves with position feedback are common in heavy-duty robots.

Final Answer: Can accelerate, decelerate, and follow continuous paths under feedback control