Linear actuator

A linear actuator hung through a connection component along a first direction, and comprising:

• a base;
• a linear motor disposed on the base and comprising a fixed coil module and a movable magnetic backplane, wherein the fixed coil module is fixed on the base, and the movable magnetic backplane is configured to slide relative to the fixed coil module along the first direction;
• a linear encoder disposed between the base and the movable magnetic backplane of the linear motor and configured to detect a linear displacement of the movable magnetic backplane relative to the base;
• a rotary motor rotated around a central axis in parallel with the first direction;
• and
• a load cell having two opposite sides parallel to the first direction, respectively, wherein the movable magnetic backplane of the linear motor and the rotary motor are connected to the two opposite sides of the load cell, respectively, wherein the load cell is subjected to a force applied thereto by the rotary motor and parallel to the first direction, and configured to convert the force into an electrical signal.