APPLICATIONS OF GENERALIZED ZERO-EFFORT-MISS / ZERO-EFFORT-VELOCITY FEEDBACK GUIDANCE ALGORITHM

摘要

The performance of the zero-effort-miss/zero-effort-velocity (ZEM/ZEV) feedbackguidance algorithm is evaluated through practical space application examples.The ZEM/ZEV feedback guidance algorithm is in general not an optimalsolution; however, it is an optimal solution in a uniform gravitational environment.It is also conceptually simple and easy to implement, and thus has greatpotential for autonomous on-board implementation. It is shown that, for someclassic ballistic missile intercept and asteroid intercept scenarios, the ZEM/ZEV algorithm can even compete with corresponding open-loop optimal solutions,while its feedback characteristics make it more suitable to deal with uncertaintiesand perturbations. By employing the ZEM/ZEV algorithm in thehighly nonlinear orbital transfer and raising problems and comparing with correspondingopen-loop optimal solutions, its simplicity and near-optimality arefurther verified.