摘要
船摇前馈是航天测量船稳定性设计方法之一。实践证明,船摇前馈对改善系统误差有益,目标速度前馈特别是加速度前馈的改善效果要比船摇前馈的好。分析原因,一方面是目标相对船摇来说变化慢,低频分量多,滤波后能够比较准确地得到所要的值,前馈精度也就高;另一方面是船摇前馈值特别是加速度前馈比较难以准确获得。因此,准确地计算前馈量,是补偿测量设备伺服系统滞后造成的误差,达到高精度地跟踪目标的关键之一。本文详细给出了船摇前馈量的具体计算公式,并在卫星发射任务中进行了应用和验证。
Ship-shaking feedforward is a tracking and control vessel stabilization design method and it is field-proven to be beneficial to improvement of system error.Feedforward on object speed,especially acceleration feedforward,is better than feedforward on ship-shaking in the improvement.Two reasons result in this.First,object flight change is slower than ship-shaking change and has more low frequency components and thus provides for higher precision data following filtering.Second,ship-shaking feedforward,especially acceleration feedforward,is more difficult to calculate accurately.Therefore,accurate calculation of feedforward is the key to compensate for errors caused by servo system lag and to realize high accuracy tracking of an object.Equations are presented for calculation of ship-shaking feedforward and they are validated through application in satellite launch support missions.
出处
《飞行器测控学报》
2011年第2期64-69,共6页
Journal of Spacecraft TT&C Technology
关键词
船摇
前馈
处理方法
Ship-Shaking
Feedforward
Data Processing Method
