| 摘要 |
<p>1,100,957. Controlling missiles. BODENSEEWERK PERKIN-ELMER & CO. G.m.b.H. 4 March, 1965 [5 March, 1964], No. 9284/65. Heading B7G. A crossed wing missile is controlled by a localizer beam and carries computing equipment for measuring the distance from the beam in y and z directions, and damped accelerometers responsive to acceleration in y and z directions, signals from the computing equipment and the accelerometer being supplied to a stabilizer controlling aerodynamic control surfaces. The accelerometer is heavily damped (e.g. the damping coefficient is 15 instead of the usual 0À7), so that at the range of natural frequencies of oscillation of the missile about the localizer beam, damping is proportional to the velocity at which the missile approaches the beam, and below this range, damping is proportional to the acceleration. The accelerometer (Fig. 5, not shown) comprises a mass coupled to a variable resistor in a bridge circuit, and restrained by an electromagnet. Current from the bridges passes through the electromagnet and through a resistor and capacitor in parallel, to produce currents proportional to displacement and velocity of the mass.</p> |
