Abstract
Abstract : In space constrained applications such as tactical missiles, locating the inertial sensors off the platform simplifies packaging and may allow existing missile autopilot gyros to be used for platform stabilization. In strapdown stabilization, inertial sensors are fixed to the base of the inertial platform rather than directly on the platform itself. Gimbal position sensor information is combined with body-fixed inertial rate sensor information to estimate the inertial rate of the platform. This estimate of platform rate is a key factor that determines the stabilization performance of the system. An initial assessment of the feasibility of strapdown stabilization for high-resolution imaging seekers was conducted. A linear state space model and a detailed nonlinear planar simulation were developed of a tactical high-resolution platform system. The simulation includes gimbal inertia, inertial sensors, position sensors, friction, mechanical alignment, compliances, and control loop compensation. The simulation was used to predict the platform stabilization performance. In addition, effects of stabilization performance on target signal strength for an imaging seeker were estimated.
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