•  
  •  
 
Astrodynamics

Article Title

Optimal terminal-time determination for the ZEM/ZEV feedback guidance law with generalized performance index

Keywords

Zero-Effort-Miss/Zero-Effort-, Velocity (ZEM/ZEV), optimal feedback guidance, terminal-time determination, intercept, rendezvous

Abstract

This paper investigates a problem of determining the optimal terminal-time or time-to-go ofthe ZEM/ZEV (Zero-Effort-Miss/Zero-Effort-Velocity) feedback guidance law for a varietyof orbital intercept or rendezvous maneuvers. A generalized ZEM/ZEV guidance problem,whose objective is to minimize a combination of the control energy and terminal time, isexamined. Algebraic equations whose solution provides the optimal terminal-time of theorbital intercept/rendezvous problems are derived based on the optimal control theory.The effectiveness of the proposed approach is demonstrated for various orbital maneuverproblems.

Publisher

Tsinghua University Press

Share

COinS