Scheduling Strategy Using Frequency Transition for a Helicopter Simulation as a Network Control System Approximation

In recent years Real Time Distributed Systems (RTDS) have become widely used in industry and in research, such as mission-critical and long-running applications; thus they need to maintain consistency or recover from errors without suspending execution. Characteristics of RTDS include the ability to complete within time restrictions, and to provide coherence, adaptability, and stability. Recent applications of RTDS with time restrictions are implementations of Networked Control Systems (NCS), which consist of several nodes which participate in the control process and sensor/actuator activities. In order to achieve the overall objectives of all tasks in a global and distributed manner, it is necessary that each node exchanges their own information properly through communication media in a real time environment [7]. In these applications, the time requirements of a NCS must be scheduled. In general there are two types of tasks in a NCS.