1- MUT university
Abstract: (906 Views)
In this paper, a two-loop autopilot in the presence of external disturbance is designed to control the roll channel of missile. If an external disturbance applied to the system, according to its amplitude and frequency, the output of the system is affected and in addition to reducing the accuracy of input tracking, it may lead to instability. So in this paper, a discrete time sliding mode extended state observer is designed to improve the response of the system in the presence of external disturbance. Despite the fact that continuous-time observers are able to estimate states and disturbance at short time, their implementation in processors has challenges such as reset the observer gains and choosing the sampling time. Therefore, it is better to design the observer in discrete time type so that its implementation issues are considered analytically from the design process and are also examined in computer simulations. After the design, the stability of the proposed observer is checked and evaluated in the control loop by simulation. The simulation results show that the designed observer has estimated the disturbance with high speed and accuracy. By using the estimation result in the control signal calculated by the autopilot, the roll angle of missile is controlled and tracked the command input of autopilot loop. At the end, the processor in the loop test has been performed to better evaluate the performance of the autopilot in physical conditions and its results have been presented.
Type of Article: Research paper |
Subject:
Special
Received: 2023/06/26 | Accepted: 2024/12/28 | ePublished ahead of print: 2025/01/29
Received: 2023/06/26 | Accepted: 2024/12/28 | ePublished ahead of print: 2025/01/29
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