The phrase "human operator" refers to a person who controls or operates a machine or system. They are responsible for making decisions, giving commands, and carrying out tasks. Full definition
With a rapidly improving ability to manipulate objects of all shapes and sizes, they have the potential to replace human operators with better accuracy, better precision, and better efficiency. (nvp.com)
The permit also required human operators to be present whenever the cars are on the road. (digitaltrends.com)
For example, as human operators shift the lever forward or backward, the robot recognizes the command and moves appropriately. (sciencedaily.com)