A Simple Explicit Guidance Scheme Based on Velocities-to-be-Gained

Jalali-Naini, S. H.
January 2011
Journal of Aerospace Science & Technology;winter/spring 2011, Vol. 8 Issue 1, p29
Academic Journal
The article discusses a research study on deriving vertical plane closed-loop guidance laws for determining a launch vehicle thrust direction as to velocities-to-be-gained. Based on velocities-to-be-gained, it says, guidance laws are classified into the explicit and implicit schemes with corresponding advantages and disadvantages such as the Q guidance for elliptical orbits and the E guidance method used in the study with more flexibility in terms of velocities-to-be-gained. It presents the basic formulation used in the closed-loop strategy and in special cases along with the simulation results. Conclusions indicated that for time-varying thrust magnitude, the solution can be extended and velocity constraints implemented through the thrust direction of the closed loop strategy.


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