Anti-disturbance guidance method for precision landing of planet
A planetary and precise technology, applied in the field of deep space exploration, can solve the problems affecting the normal descent process, the trajectory optimization algorithm is limited, and the trajectory is difficult to ensure optimality, etc., to reduce the amount of calculation and solution difficulty, realize disturbance compensation and suppression, The effect of improving safety
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[0069] In order to verify the feasibility of the method, for the dynamic descent section of the Mars landing, the fixed coordinate system of the landing point is adopted, and the initial position r of the dynamic descent section of the probe is 0 for [-400,700,520] T m, the initial velocity v 0 is [19.34,-9.15,-29.16] T m / s, end position r f is [0,0,0] T m, terminal velocity v f is [0,0,0] T m / s, the gravitational acceleration g of Mars is [0,0,-3.7114] T m / s 2 , the negative sign indicates that the direction is vertically downward, and the maximum control amplitude u max 15m / s 2 , the minimum control magnitude u min -15m / s 2 , the maximum velocity amplitude v max is 60m / s, the glide angle constraint φ max is 72°, the line of sight angle constraint and θ max is 50°, the landing time t f is 30s, the sampling interval Δt is 1s, and the rolling time domain length N is 10.
[0070] A planetary precise landing anti-disturbance guidance method disclosed in this embo...
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