阻尼比连续可调的捷联惯性姿态测量系统内阻尼技术  

Internal horizontal damping network of SAMS by applying adaptively adjustable damping ratio

作　　者：顾鹏飞[1] 王省书[1] 郑佳兴[1] 赵英伟[1] 

机构地区：[1]国防科学技术大学光电科学与工程学院,湖南长沙410073

出　　处：《红外与激光工程》2017年第5期122-128,共7页Infrared and Laser Engineering

摘　　要：在自主导航状态下,捷联姿态测量系统存在的舒拉调谐等周期性误差可以通过内阻尼技术进行有效抑制。但是阻尼的加入破坏了系统的舒拉调谐条件,系统会受载体加速度的影响,产生新的姿态角误差。针对传统阻尼网络阻尼比固定的缺点,设计了一种阻尼比可连续调节的阻尼网络,推导了载体加速度、阻尼比和姿态角误差三者之间的关系。为抑制系统在载体机动状态下产生的姿态角误差,提出了一种根据载体加速度大小实时调整系统阻尼比的自适应阻尼方案。仿真与实验结果均表明:设计的阻尼网络可有效抑制系统姿态角误差;自适应阻尼方案可有效降低载体在机动状态下阻尼对系统的不利影响,提高系统精度。In the autonomous navigation state, the periodic errors, such as the Schuler oscillation amplitude error, in the strap-down attitude measurement system （SAMS） can be restrained through the internal horizontal damping method. However, the schuler tuning condition of the SAMS will be destroyed when the damping network was introduced, and new attitude errors will be generated if the motion of the carrier changes quickly. In order to overcome the shortcomings of the conventional damping network with fixed damping ratio, a novel damping network with continuously adjustable damping ratio was designed to suppress the attitude error. The relationship between the acceleration of the carder, the damping ratio and the attitude error was also derived. An adaptive-damping method was proposed to adjust the damping ratio of the system according to the carder＇s acceleration. The simulation results and experiment results indicate that the novel damping network can suppress the Schuler oscillation amplitude error, and the adaptive-damping method can reduce the ill effect of the damping network to the attitude estimation, and improve the performance of the SAMS.

关 键 词：捷联姿态测量系统 水平阻尼 可调阻尼比 自适应阻尼 

分 类 号：TU666.12[建筑科学—建筑技术科学]