质量矩控制飞行器的压心不确定性问题研究

为了减小压心不确定性对质量矩控制的影响,提高活动质量块对系统的控制能力,本文推导了飞行器姿态配平角与压心偏差的关系,分析了压心系数偏差对飞行器控制性能的影响,给出了压心最大容许偏差范围的解析表达式,然后针对压心偏差对飞行器的影响进行了仿真计算,并在此基础上分析了压心测量偏差对质量矩控制飞行器总体参数的要求,提出了几种减小压心不确定性对飞行器控制性能影响的结构布局优化方法。结果表明:对于静稳定导弹,将径向滑块的滑道配置在飞行器的前鼻部,根据任务指标合理地设计各滑块的偏移量等措施都可以减小压心不确定性对质量矩控制的影响。

The Research on the Uncertainty of Pressure Center for Moving Mass Actuated Vehicle

In order to reduce the impact of uncertainty of the pressure center on moving mass control and improve the control capacity of the moving point mass,the relationship between trim attitude angle and the deviation of pressure center is derived in this paper.In addition,the effect of deviation of pressure center coefficient on the control performance is analyzed.Then the analytical expression about the maximum allowable deviation range of pressure is derived.Based on the simulation analysis,the requirements of global parameters for measurement error of pressure center on moving mass actuated vehicle are analyzed.The structural layout optimization methods which can reduce the impact of the deviation of pressure center on performance of vehicle control are proposed.The results show that the impact of the deviation of pressure center on the performance of moving mass control can be reduced by locating radial moving masses forward to the nose of the vehicle and designing the moment offset of every moving mass reasonably according to the task.