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针对摆式陀螺寻北仪存在的限幅效率低的工程实际问题,提出了一种步进快速限幅方法,介绍了该方法的实现原理和步骤,分析了3种主要测量误差对限幅效果的影响,论证了步进快速限幅法在理论上的可行性,最后将步进快速限幅法成功应用于摆式陀螺寻北仪上。设计了相应的限幅试验,利用摆动的平衡位置主动跟踪逆转点,实现了对摆幅的快速精确限制。理论和试验结果均表明:提出的步进快速限幅法保留了传统步进法不需要增加系统硬件的优点,有效克服了采用电磁阻尼法限幅时电磁干扰力矩的问题,保持了限幅的可靠性。基于步进快速限幅方法的摆式陀螺寻北仪能在一个步进周期(约60s)内实现对摆幅的快速精确限制,较传统步进法可以节省2个以上的步进周期,为缩短寻北时间提供了理论支撑和实践依据。
Aiming at the practical problems of the slewing gyroscope looking for a North China instrument with low clipping efficiency, this paper proposes a stepping fast clipping method, introduces the realization principle and steps of the method, analyzes the influence of the three main measurement errors on the clipping effect The feasibility of the stepping fast clipping method is demonstrated. Finally, the stepping rapid clipping method is successfully applied to the pendulum gyro finder. The corresponding limiter experiment is designed, and the reversal point is actively tracked by the equilibrium position of the swinging, so that the swinging limit can be quickly and accurately achieved. The theoretical and experimental results show that the proposed stepping fast clipping method retains the advantages of traditional stepping method without adding system hardware and effectively overcomes the problem of electromagnetic interference moment when using electromagnetic damping method to limit the amplitude, reliability. The pendulum gyro-finder based on step-by-step fast clipping method can achieve fast and accurate swing limit within one step cycle (about 60s), which can save more than two step cycles compared with the traditional step-by-step method Shorten the time to find a North to provide theoretical support and practical basis.