Target Tracking Filter Study for Command-All-The-Way Intercepts
Abstract
In command-all-the-way (CAW) interceptor guidance, an interceptor missile receives all acceleration commands from guidance laws in the weapons system at the launch platform, where a radar is used to track both the missile and the target. Since the missile uses no terminal homing in CAW, highly accurate state estimates of both the interceptor missile and the target are needed for the guidance algorithms to provide acceleration commands to the interceptor missile that are sufficiently accurate to ensure intercept of the target An Interacting Multiple Model (IMM) algorithm is considered for tracking highly maneuvering targets for support of CAW intercepts. The IMM algorithm uses multiple models with model switching governed by an underlying Markov chain to better represent the target dynamics than a single model filter. Thus, using the output state estimate from the IMM algorithm will result in better acceleration commands from the guidance algorithm to the interceptor missile than that of a single model filter. The performance of the IMM algorithm and a single model Kalman filter are compared for both maneuvering and non-maneuvering targets. The simulation was executed for varying intercept ranges. The impact of track filtering on the radar resources required for an intercept and adjusting the proportional navigation gain were also studied through simulation studies and the results are summarized. The IMM algorithm provides for lower miss distances while using less radar resources than that of single model filters.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1995
- Accession Number
- ADB199063
Entities
People
- S. A. Hoffman
- W.D. Blair
Organizations
- Naval Surface Warfare Center