在导弹寻的制导系统中,可增添数字信号处理能力,以提供对付复杂威胁决策能力的广泛方法。数字处理或在地面上进行,或在导弹上进行。然而,无论在何处,都将把一些附带的动力学特性引入到制导回路中,因而可能降低系统性能。事实上,数字化的影响是如此之重要,以致在开始时就必须考虑,以保证制导系统的设计获得成功。数字化的最重要的影响之一是把采样和保持过程引入到姿态制导回路中。本文讨论数字处理对系统相对稳定性和性能的影响。介绍改善系统性能的各种方法,同时介绍折衷评定曲线,这些曲线表明应该如何确定主要的子系统参数,如导引头稳定回路增益及自动驾驶仪的时间常数。分析结果给出了当采用数字式制导时,制导子系统参数与可接受的系统性能鲁棒集之间的折衷处理。 In missile-oriented guidance systems, digital signal processing capabilities can be augmented to provide a broad range of approaches to complex threat decision making. Digital processing or on the ground, or on the missile. However, some of the attendant kinetic properties will be introduced into the guidance loop wherever it may be, thus reducing system performance. In fact, the impact of digitization is so important that it must be taken into consideration from the outset to ensure that the design of the guidance system is a success. One of the most important effects of digitization is the introduction of the sampling and holding process into the attitude-guided loop. This article discusses the impact of digital processing on the relative stability and performance of the system. Describes various ways to improve system performance, along with trade-off evaluation curves that show how key subsystem parameters such as seeker stable loop gain and autopilot time constants should be determined. The results of the analysis give the trade-off between the guidance subsystem parameters and the acceptable robust set of system performance when using digital guidance.