Patent ID: 7795565
Filing Date: 2010-09-14
Classification: F41G,F42B,G05D

Abstract:
1. A guided targeting system for converging a moving controlled item onto a projected intersection with a target, comprising: at least one sensor for repetitively sensing at least one parameter by which target headings are defined along a line of sight to the target from the controlled item, the target headings being accurate to a tolerance error of a sensor signal; a controller responsive to the sensor signal, wherein the controller is operable at least partly from said target headings to compute an updated location of the projected intersection with the target and a path along a line to said updated location, wherein the controller is configured to determine a heading error between a current heading of the controlled item and said path, wherein the heading error includes a sum of a guidance correction variance and said tolerance of the sensor signal; and at least one steering device for a steering force with an amplitude that is increased and decreased as a function of the heading error; wherein the controller is configured to apply a guidance function to the steering device, the guidance function having a gain; wherein the controller is further configured to control the gain of the guidance function, the gain of the guidance function determining how aggressively the guidance function will be applied by the controller; and wherein the gain of the guidance function is reduced by said controller upon approaching the projected intersection, whereby application of the steering force in reaction to the tolerance of the sensor signal is minimized.