Based On Gravity Assist With Potential Presets Venus And Mars Probes Orbit Design

Two satellites with one rocket technology matures, in 2009, NASA launched LRO and LCROSS by the same rocket. The satellites turn near earth satellite into deep space probes. About the deep space trajectory design, Venus gravity-assisted Mars probe orbit has been proven cost more energy than the Hohmann transfer. Preset potential energy at launch. With gravity assist technology, the two probes separate at Venus, accelerating the Mars probe while slowing down the Venus probe, Not only saves energy, but also saves funds.Two-point boundary problem solved by Lambert equation, speed variation solved by astrodynamics and then get the energy cost. Based on the energy cost,possible launch window is found, controlling the escape velocity to finish the Earth-Venus transfer. At Venus, two probes separated to get accelerated. Venus probe decline accelerated after the separate acceleration, Use STK to show the maneuver speed to ensure Venus probe be captured by Venus. Mars probe get acceleration after the separation, maneuver again at Mars to ensure a smooth landing on Mars. MATLAB preliminary design, STK corrected and simulated the orbit, results show: Venus probe successfully captured Venus, Mars probe crashed into Mars successfully, and then use STK to analyze the orbital parameters.For contrasting the orbits, deep space exploration dynamics basic theory is used, Hohmann transfer method, to solve the orbital parameters of the traditional deep-space exploration orbit. Get the traditional deep-space exploration orbit parameters and transfer time. Comparison of Hohmann transfer orbit and Earth-Venus-Mars orbit is showed.By contrast conclusion, energy saved by two satellites with one rocket technology. The energy cost of Earth-Venus-Mars orbit is lower than the traditional Hohmann transfer orbit. Furthermore, orbit achieved a goal that explore two planets with one launch, saving the launch cost,given multi-satellites with one rocket technology gradually develop into deep space exploration, Extends the use of multi-satellites with one rocket technology. This idea is worth further study.