entire mission and injects the payload precisely in the intended orbit. The dispersions in propulsion system performance, estimated aerodynamic characteristics, expected structure of the wind, a variety of internal and external disturbances cause deviations in the launch vehicle trajectory from the preset path. The navigation system measures the instantaneous state of the vehicle, and using this information the guidance system generates the vehicle steering commands to achieve the specified orbit. The vehicle control systems, comprising an autopilot and the control power plants, stabilize and steer the vehicle along the desired trajectory in the presence of destabilizing internal and external disturbances. A typical hardware and software elements of NGC system is given in Figure 4. The navigation system is below, The accuracy of the navigation sensors, the versatility of the navigation software, and the effectiveness of the guidance scheme determine the accuracy of orbital injection. The robust autopilot design, considering the most probable control–structure–slosh interaction and the performance of control power plants, determine the disturbance-rejection, stabilization and steering capability. All these functions are carried out through a set of fault-tolerant and reconfigurable real time onboard computers. Redundancy has been built into each of the components, and a well-defined mission salvage plan is introduced to take over, in the case of irrecoverable failure of any of the elements of the avionics system in flight. Further, all the computational software systems need to meet the requirements, without compromising on the accuracy, reliability and robustness. For an efficient function of onboard avionics, the tasks are distributed over the multi-processor configurations with proper synchronization of the functions, and signal flow without any delay. The Telemetry Tracking Command (TTC) system in the vehicle enables the monitoring of health and performance of the entire range of subsystems during the flight. The state-of-the-art NGC and TTC systems are realized using indigenous inertial sensors, onboard computers, optimal software, the control electronics, and the control power plants. The validation of NGC system under the flight environments is another significant task, which involves the realization of simulation test beds with multiple computers and real-time operating software. Navigation systems: After going through a series of steps involving realization of Stabilized platform inertial attitude reference system, using single degree of freedom Rate Integrating Gyroscope (RIG), Stabilized Platform Inertial Navigation System using rigs and navigation grade Servo Accelerometers (SA).
entire mission and injects the payload precisely in the intended orbit. The dispersions in propulsion system performance, estimated aerodynamic characteristics, expected structure of the wind, a variety of internal and external disturbances cause deviations in the launch vehicle trajectory from the preset path. The navigation system measures the instantaneous state of the vehicle, and using this information the guidance system generates the vehicle steering commands to achieve the specified orbit. The vehicle control systems, comprising an autopilot and the control power plants, stabilize and steer the vehicle along the desired trajectory in the presence of destabilizing internal and external disturbances. A typical hardware and software elements of NGC system is given in Figure 4. The navigation system is below, The accuracy of the navigation sensors, the versatility of the navigation software, and the effectiveness of the guidance scheme determine the accuracy of orbital injection. The robust autopilot design, considering the most probable control–structure–slosh interaction and the performance of control power plants, determine the disturbance-rejection, stabilization and steering capability. All these functions are carried out through a set of fault-tolerant and reconfigurable real time onboard computers. Redundancy has been built into each of the components, and a well-defined mission salvage plan is introduced to take over, in the case of irrecoverable failure of any of the elements of the avionics system in flight. Further, all the computational software systems need to meet the requirements, without compromising on the accuracy, reliability and robustness. For an efficient function of onboard avionics, the tasks are distributed over the multi-processor configurations with proper synchronization of the functions, and signal flow without any delay. The Telemetry Tracking Command (TTC) system in the vehicle enables the monitoring of health and performance of the entire range of subsystems during the flight. The state-of-the-art NGC and TTC systems are realized using indigenous inertial sensors, onboard computers, optimal software, the control electronics, and the control power plants. The validation of NGC system under the flight environments is another significant task, which involves the realization of simulation test beds with multiple computers and real-time operating software. Navigation systems: After going through a series of steps involving realization of Stabilized platform inertial attitude reference system, using single degree of freedom Rate Integrating Gyroscope (RIG), Stabilized Platform Inertial Navigation System using rigs and navigation grade Servo Accelerometers (SA).