1. In the attitude control system, three channels are recognized. itch', in the longitudinal plane, is controlled based on a, olling and yawing', in the lateral plane, are controlled based on respectively o, and p, Correspondingly three independent PD-Mamdani fuzzy controllers are designed to realize the pitch, rolling and yawing attitude controls. A rule base, with two inputs and one output, is constructed for each separatechannel.
2. where qdYnSLis the product of aerodynamic pressure, reference area and reference length. ha is the variation of the angle of attack with reference to the nominal value along the reference trajectory. & = 6e-6e,i, is the elevator deflection with reference to the trim position. The aerodynamic coefficients Cl, C& Cl+ Cm, Cilzs, Cry CQ, and Clz~~are scheduled with Mach-number[6'71,along the reference trajectory.
3. Hadaegh, F.Y., E. Mettler, and C.F. Lin, "Autonomous Spacecraft Guidance and Control0022, AIAA 96-3924