Resumo

ALFONSI, Alfonso  e  PEREZ, Jesús. Real-time control system for a compact pilot plant using open source software. uct [online]. 2009, vol.13, n.52, pp.189-198. ISSN 1316-4821.

A real-time control system is developed in a pilot plant integrated by industrial components with academic aims and of investigation. Using HOOD methodology, Linux/Ubuntu like operating system and like run supports Ada 2005. In the logical design, there are nine hierarchical decompositions for the individual control and multivariable in open and closed loop, of three loops: flow, pressure in the bomb and level in the tank 2, with deadbeat controllers. In the physical design, a scheduler is used guided by priorities, applying the based analyses for utilization and in response time, manifesting that the tasks have their guaranteed terms, being this necessary and enough condition. For the detailed design packages, features, procedures and tasks are generated. Finally in the phase of tests, experiences in open and closed loop become. The variables were validate logics and temporarily. The system presents an error in permanent state and oscillatory component among worthless sampling instants, the effects existing of the computational delay. The codes of the system are a contribution for the design of control system of real time computer-aided using open source software.

Palavras-chave : Discrete Control system; Open Source Software; Real Time System.