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Spanos, Pol D. Harris, Wyatt Jacob 2012-07-03T22:49:56Z 2012-07-03T22:49:56Z 2011-08 2011 Harris, Wyatt Jacob. "Comparison of Guidance Methods for Autonomous Planetary Lander." (2011) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/64447">https://hdl.handle.net/1911/64447</a>. https://hdl.handle.net/1911/64447 HarrisW THESIS M.E. 2011 HARRIS Guidance methods for a powered descent planetary lander are examined. Several guidance laws are developed and analyzed including Apollo derived, modified Apollo, time efficient and fuel efficient methods. These laws are implemented using two different methods: Apollo approach, and real time. The equations of motion for an arbitrary planetary lander with sloshing fuel and a gimbaled nozzle are derived using a Newtonian approach. A six degree of freedom (6DOF) simulation of the vehicle system dynamics is programmed in Simulink to test the various guidance methods. The guidance methods are assessed using several different trajectories. 137 pp application/pdf eng Copyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder. Mechanical engineering Materials science Comparison of Guidance Methods for Autonomous Planetary Lander Thesis Text Mechanical Engineering Engineering Rice University Masters Master of Science open.access