The servo turntable of infra red search and track(IRST)systems is of large inertia and low stiffness due to limitations of airborne systems.A quintic curve based search control algorithm for servo of large inertia and low stiffness is proposed in this paper.On the basis of analysis of traditional speed control algorithms,turntable acceleration and deceleration,swing and other swing sweep control is achieved using the acceleration and deceleration control model of the quintic curve.The performance,searching and imaging effect of the linear swing sweep control algorithm,7 segment S shape curve algorithm and quintic curve swing sweep control algorithm are compared respectively.The experimental results show that the system adopting quintic curve swing sweep control can reach the preset value rapidly,and is able to accelerate from zero to ≮100°/s within 100 ms with velocity error no larger than 0.1‰.Therefore,it can effectively relieve system overshoot,reduce the time for stability adjustment,while showing good imaging effect and improved dynamic performance of the system.
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蔡彦博,杨德振.大惯量低刚度转台的扫描控制[J].激光与红外,2022,52(2):247~252 CAI Yan-bo, YANG De-zhen. Scanning control of large inertia and low stiffness turntable[J]. LASER & INFRARED,2022,52(2):247~252