经纬仪控制模态切换时的动态分析和脱靶量跃变抑制

分析了光电经纬仪工作方式切换过程中系统发生跃变、超凋的原因,并采用了一种初值补偿的方法解决该问题.建立了系统切换过程的数学模型,并从理论上阐述了产生这些问题的原因.针对这些问题,设计了一种基于补偿控制器输出的初值补偿切换算法,并给出了加入初值补偿之后的系统数学模型和响应形式,以及该算法的具体实现.最后,通过仿真实验,验证了该方法能够将脱靶量跃变抑制在0.003°以下,有效地改进了系统的动态过程,并抑制了切换过程中产生的跃变.

Analysis of transient response and suppression of miss distance in tracking mode switch of theodolite

The turbulence and overshot come from switching tracking mode in theodolite system are investigated.A math model of the system switching is established and the reasons for these problems are figured out in theory.In order to improve the characteristics of transient response,an initial value compensation method based on compensating the difference outputs between current controller and former controller is proposed and compensated math model and response for this system are given.Simulation results indicate that the turbulence of miss-distance is restrained within 0.003°,which improves the dynamic process of the system and suppresses the turbulence in switching track mode.