The No. Three soft landing trajectory design and control strategy

• 1、Liaoning Technical University ,Huludao 125105
• 2、Liaoning Technical University Basic teaching department ,Huludao 125105

Abstract：This paper mainly studies the realization on the surface of the moon soft landing area precisely specified. The six stage in meet soft landing process key point, and the least energy consumption under the premise of the landing process, establish related model analysis and solution to the problem. The first part: using the simplified orbit dynamics model, through a simple analysis and calculation, got the rough location of track in recent months to prepare the landing point and the point farthest from the moon's under certain assumptions, and chang e three corresponding velocity magnitude and direction. The second part: Based on the first part results, to increase the use of local search strategy of the IACA algorithm and the polynomial fitting method of undetermined coefficients, included angle of Chang'e three lunar soft landing force, will be introduced into the dynamic equations are simulation, to calculate the various parameters, and analysis to determine the optimal parameters of the Chang'e three lander orbit and the various stages of the control strategy. The third part: the second part image contrast into numerical comparison, analyzes the advantage of IACA algorithm, and the first part of soft landing trajectory model is the error analysis of the initial value and sensor, and established a new model of error correction, and the sensitivity analysis is carried out on the basis of new model, obtained the sensitive matrix.

Keywords： Lunar soft landing Dynamic model Ant colony algorithm The sensor error