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    • 3. 发明授权
    • Gyro wheel speed compensation
    • 陀螺轮转速补偿
    • US4274291A
    • 1981-06-23
    • US955864
    • 1978-10-30
    • George F. Schroeder
    • George F. Schroeder
    • G01C19/04G01C19/06G01C19/08
    • G01C19/065G01C19/04Y10T74/1225Y10T74/1229Y10T74/1282
    • A device for compensating for gyro wheel frequency inaccuracies wherein a reference oscillator feeds a square wave signal to a first and second counter. The second counter also has an input of plus or minus the spin axis angular rate. The first counter scales down the reference signal and the second counter generates a signal having a frequency proportionately higher than the first counter. The output of the second counter provides a signal indicative of angular spin rate displaced from the input gyro axis. The outputs from the first and second counters are fed to an up/down counter which combines the two signals to provide for gyro wheel compensation.In a second embodiment of the invention a computer having spin rate axis signal from two gyros, control two settable counters to obtain compensation of the gyro wheel of a first and second gyro.
    • 一种用于补偿陀螺仪轮频率误差的装置,其中参考振荡器将方波信号馈送到第一和第二计数器。 第二个计数器还具有加或减旋转轴角速率的输入。 第一计数器缩小参考信号,第二计数器产生具有比第一计数器成比例的频率的信号。 第二计数器的输出提供指示从输入陀螺仪轴移位的角旋转速率的信号。 来自第一和第二计数器的输出被馈送到组合两个信号以提供陀螺仪轮补偿的上/下计数器。 在本发明的第二实施例中,具有来自两个陀螺仪的自旋速度轴信号的计算机控制两个可设置的计数器,以获得第一和第二陀螺仪的陀螺仪轮的补偿。
    • 5. 发明授权
    • Multiple event hardened core memory
    • 多事件硬核存储器
    • US4464752A
    • 1984-08-07
    • US318726
    • 1981-11-06
    • George F. SchroederGarry E. PittJohn F. ScullyLell E. Barnes
    • George F. SchroederGarry E. PittJohn F. ScullyLell E. Barnes
    • G06F11/00G06F11/10G11C29/00
    • G11C29/88G06F11/1012
    • A computer system is provided for reconstructing a word, which is altered during cycling of the computer memory when a nuclear event occurs. The computer system includes a nuclear event detector, a circuit for setting flags in response to the detection of an event, a generating circuit for generating a random variable time interval in response to the flags, a circuit for performing block parity on the data in the memory in response to the flags, and correcting circuit for correcting the altered word in the memory in response to the block parity circuit. The computer system further includes a circuit for correcting multiple memory word upsets in response to the block parity circuit and an updating circuit for performing block parity during sequential storage or random storage of the data words before or after an event.
    • 提供了一种计算机系统,用于重建在核事件发生时在计算机存储器的循环期间被改变的单词。 计算机系统包括核事件检测器,用于响应于事件检测而设置标志的电路,用于响应于该标志产生随机可变时间间隔的生成电路,用于对所述标记中的数据执行块奇偶校验的电路 响应于标志的存储器,以及响应于块奇偶校验电路校正存储器中改变的字的校正电路。 计算机系统还包括用于响应于块奇偶校验电路校正多个存储器字失调的电路和用于在事件之前或之后的数据字的顺序存储或随机存储期间执行块奇偶校验的更新电路。
    • 7. 发明授权
    • Ring laser gyro dither pulse eliminator
    • 环形激光陀螺脉冲除颤器
    • US4344706A
    • 1982-08-17
    • US168918
    • 1980-07-14
    • Bo H. G. LjungGeorge F. Schroeder
    • Bo H. G. LjungGeorge F. Schroeder
    • G01C19/66G01C19/64
    • G01C19/664
    • A ring laser gyro is electromechanically oscillated so that oppositely moving light beams in the gyro do not exhibit an undesirable lock-in effect. A piezoelectric transducer mounted in the gyro measures the dither. Analog/digital circuitry converts the measurement to digital dither signals. A non-compensated beam combiner and photodetector assembly are integrally mounted to the gyro for producing beam frequency outputs from the light beams, indicative of inertial rotation of the gyro. The beat frequency outputs and dither signal are input to logic circuitry which eliminates the effect of the dither signal on the beam frequency output signals.
    • 环形激光陀螺仪机电振荡,使得陀螺仪中相对移动的光束不具有不期望的锁定效果。 安装在陀螺仪中的压电换能器测量抖动。 模拟/数字电路将测量转换为数字抖动信号。 无补偿光束组合器和光电检测器组件一体地安装到陀螺仪,用于产生来自光束的光束频率输出,指示陀螺仪的惯性旋转。 拍频输出和抖动信号被输入到逻辑电路,消除抖动信号对波束频率输出信号的影响。
    • 9. 发明授权
    • Error correction system for random access memory
    • 随机存取存储器纠错系统
    • US4031374A
    • 1977-06-21
    • US536142
    • 1974-12-24
    • Alan I. GroudanGeorge F. SchroederH. Lee Treffinger
    • Alan I. GroudanGeorge F. SchroederH. Lee Treffinger
    • G06F11/00G06F11/10G11C29/00
    • G06F11/1004
    • An error correction system is provided for a random access memory system of the magnetic core or plated wire type, and which serves to render the memory system immune to the effects of nuclear radiation, and the like. The system of the invention includes circumvent circuitry which serves to limit all currents in the memory access network to safe values during a radiation event, so as to pevent burn-out of the memory and of its associated components. The system of the invention also serves to correct single word errors which can occur to words being written or read during the radiation pulse. The single word error correction is achieved in a first embodiment of the invention by partitioning the fixed data program words in the memory into blocks; by providing an error correction word for each such block, and by reconstructing from the error correction word, the word being read or written during the radiation pulse. This is achieved in the first embodiment of the error correction system by first accessing the affected word, then loading all zeros into the memory address of the affected word, and then reconstructing the effected word by the provision of an "exclusive or" summing means which forms a computed error correction word for the entire block, including the affected word (which is now zeros), plus the original error correction word. The computed error correction word is a reconstruction of the affected data word. A second embodiment of the invention achieves the same correction in the case of the variable data storage portion of the memory, by means of a system which continuously up-dates the error correction word as the variable data in the memory is up-dated. Further embodiments of the invention provide error correction to the variable data words without the use of error correction words.
    • 为磁芯或电镀线型的随机存取存储器系统提供纠错系统,其用于使存储器系统免受核辐射的影响等。 本发明的系统包括规避电路,其用于将存储器访问网络中的所有电流限制在辐射事件期间的安全值,以便消除存储器及其相关组件的烧坏。 本发明的系统还用于校正在辐射脉冲期间被写入或读取的单词可能发生的单个字错误。 在本发明的第一实施例中,通过将存储器中的固定数据程序字划分成块来实现单字纠错; 通过为每个这样的块提供纠错字,并且通过从纠错字重建在辐射脉冲期间被读或写的字。 这在纠错系统的第一实施例中通过首先访问受影响的字,然后将全部零加载到受影响的字的存储器地址中,然后通过提供“排他或”求和装置来重建受影响的字, 形成整个块的计算误差校正字,包括受影响的字(现在是零),加上原来的纠错字。 计算出的纠错字是影响数据字的重建。 本发明的第二实施例在存储器的可变数据存储部分的情况下通过随着存储器中的可变数据被更新的连续地更新纠错字的系统来实现相同的校正。 本发明的其它实施例在不使用纠错字的情况下向可变数据字提供纠错。