| 摘要 |
1. In a gun fire control system for the interception of a target at a predetermined point in time prior to the time at which the target will arrive at the crossover point, apparatus comprising first means for generating a first signal proportional to target radial range, second means for generating a second signal proportional to target radial range rate, means coupled to said first and second means for multiplying said first and second signals and for producing a third signal having a first characteristic and having a value proportional to the product thereof, third means for generating a fourth signal proportional to the square of target absolute velocity, fourth means for generating a fifth signal proportional to the time of flight of a projectile to intercept said target, means coupled to said third and fourth means for multiplying said fourth and fifth signals to produce a sixth signal having a value proportional to the product thereof, multiplying means having two inputs one of which is adapted to receive said fourth signal and the other of which is adapted to receive a seventh signal, said seventh signal representing said predetermined time prior to the arrival of said target at said crossover point, said last means producing an eighth signal having a value proportional to the product of said fourth and seventh signals, means adapted to receive said sixth and eighth signals and operative to produce a ninth signal having a second characteristic and having a value proportional to the sum thereof, means for comparing the values of said third and ninth signals to produce a tenth signal having a value proportional to the difference therebetween and having the same characteristic as that one of said third and ninth signals having the greater value, and utilization means selectively responsive to a predetermined characteristic of said tenth signal, said tenth signal being applied to said utilization means.
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