Task description language for underwater robots

This paper presents task description language (TDL) for underwater robots. General primitives of TDL were designed by considering common primitives of conventional computer languages, and underwater robot-specific command primitives were designed by modifying the turtle graphic commands in Lego. An alias and procedure commands make the TDL intuitive and modular. Concurrent processing and sensor-based event handling commands are also available with TDL. An example of survey task with lawnmower pattern shows feasibility and easiness of TDL.