The feed-forward control of utility grid voltage counteracts the influence of utility grid. The system becomes a simple passivetrackingsystem.
电压前馈补偿可以抵消电网作用，使系统近似成为一个简单的无源跟随系统。
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According to this, this paper focuses on the study of bearings-only passivetrackingsystem in the aspects of the target location, time alignment and nonlinear filtering algorithm.
Constructing the system of passive multi-sensor so as to achieve the passive target detecting and tracking is significant to enhance the capability of defense system.