Reliable Onboard Computer with Triple Modular Redundancy Based on Available Multicore Microcontrollers

To meet the reliability requirements for onboard computers in aerospace and military applications, various type of redundancy must be employed. In this paper, we concerned with the triple modular redundancy (TMR) for an onboard computer with aerospace application. In the proposed architecture, control inputs and system states are measured using dsignated sensors. According to the acquired data, mission scenario and the control algorithm is processed by processing unit. Thereafter, the results are applied to the system by actuators. TMR technology in component level is used to improve the reliability of OBC according to the system requirements. All of the constituent modules of OBC, comprising processing unit, bus interface, sensor, actuators, and IO devices, benefits from triple redundancy. The reliability of the designed onboard computer is evaluated analytically, which indicates system reliability improvement according to the predetermined requirements.