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http://dx.doi.org/10.5139/JKSAS.2009.37.10.1002

Guidance Filter Design Based on Strapdown Seeker and MEMS Sensors  

Yun, Joong-Sup (인하대학교 항공우주공학과)
Ryoo, Chang-Kyung (인하대학교 항공우주공학과)
Song, Taek-Lyul (한양대학교 전자컴퓨터공학부)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.37, no.10, 2009 , pp. 1002-1009 More about this Journal
Abstract
Precision guidance filter design for a tactical missile with a strapdown seeker aided by low-cost strapdown sensors has been addressed in this paper. The low-cost strapdown sensors consist of an IMU with 3-axis accelerometers and gyroscopes, 3-axis magnetometers, and a barometer. Missile's position, velocity, attitude, and bias error of the barometer are considered as state variables. Since the state and measurement equations are highly nonlinear, we adopt UKF(Unscented Kalman Filter). The proposed guidance filter has a function of a navigation filter if target position error is not considered. In the case that the target position error is introduced, the proposed filter can effectively estimate the relative states of the missile to the true target. For specific engagement scenarios, we can observe that observability problems occur.
Keywords
Guidance filter; Strapdown seeker; Strapdown sensor; Unscented Kalman filter;
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