A Precise Guidance Method Based on Virtual Proportional Guidance for the Sub-stage Return Stage of Launch Vehicle
A launch vehicle, proportional guidance technology, applied in the direction of guidance methods, instruments, design optimization/simulation, etc., can solve the problems of difficulty in repeated use, and the dispersion radius of the launch vehicle sub-stage is too large, so as to reduce the launch cost and improve the Returns the effect of guidance accuracy and good control characteristics
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[0043] A method for precise guidance of the sub-stage return section of a launch vehicle based on virtual proportional guidance, the method for precise guidance of the sub-stage return section of the launch vehicle comprises the following steps:
[0044] Step 1: install a grid rudder on the head of the launch vehicle sub-stage, and obtain the position and velocity vector of the launch vehicle sub-stage under the inertial system through the measurement of the rocket-borne GPS / INS;
[0045] Step 2: Combining the position and velocity information of the expected target landing point of the mission, obtain the component of the virtual inertial line-of-sight angular velocity of the launch vehicle sub-stage under the ground system;
[0046] Step 3: Obtain the component of the inertial line of sight angular velocity in the ballistic system through the coordinate transformation matrix from the ground system to the ballistic system;
[0047] Step 4: Deduce the virtual proportional guid...
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