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    • 2. 发明授权
    • Method and architecture for TTNT symbol rate scaling modes
    • TTNT符号率缩放模式的方法和体系结构
    • US07839900B1
    • 2010-11-23
    • US11541483
    • 2006-09-29
    • John C. HerderJames A. Stevens
    • John C. HerderJames A. Stevens
    • H04J3/22
    • H04B1/713
    • An architecture for a frequency hopped spread-spectrum transmitter-receiver in an advanced tactical data link packet switched network that ensures optimal Statistical Priority-based Media Access (SPMA) performance, enables more efficient packing of hop channels in a given allocated bandwidth and counteracts hostile jamming. The transmitter-receiver supports a scalable symbol rate mode that reduces the symbol rate in the time domain and decreases the bandwidth in the frequency domain, over a predetermined prior value. A transceiver according to the present architecture is able to statically or dynamically scale the symbol rate of transmissions, operate in burst mode and change the hop set. In one embodiment the transceiver is part of a Software Defined Radio (SDR).
    • 在高级战术数据链路分组交换网络中用于频率跳频扩频发射机 - 接收机的架构,其确保了最佳的基于统计优先级的媒体接入(SPMA)性能,能够在给定的分配带宽内更有效地打包跳信道,并抵御敌对 干扰 发射机 - 接收机支持可缩放的符号速率模式,其降低时域中的符号速率,并且在预定的先前值之后降低频域中的带宽。 根据本架构的收发机能够静态或动态地缩放传输的符号速率,以突发模式操作并改变跳数集合。 在一个实施例中,收发器是软件定义无线电(SDR)的一部分。
    • 3. 发明授权
    • Dual mode servo
    • 双模伺服
    • US4574227A
    • 1986-03-04
    • US550950
    • 1983-11-14
    • John C. HerderRandall G. Guay
    • John C. HerderRandall G. Guay
    • G05B19/39G05B11/18G05B13/00
    • G05B19/39G05B2219/41021G05B2219/42114G05B2219/42171
    • A dual mode, digital servo positioning system controls servo motor current by a processor-generated current control set point in conjunction with velocity feedback. When the motor has advanced to the vicinity of a target position, the processor opens the velocity feedback loop and reduces servo amplifier gain, such that the set point controls motor current without velocity feedback. This open loop condition provides a springy servo response that eliminates oscillation due to small deviations from target position caused by electronic drift or gravity. Position information is provided to the processor by means of quadrature encoded tachometer pulses from the motor.
    • 双模式数字伺服定位系统通过处理器生成的电流控制设定点结合速度反馈来控制伺服电机电流。 当电机前进到目标位置附近时,处理器打开速度反馈回路并降低伺服放大器增益,使得设定点无需速度反馈控制电机电流。 这种开环条件提供弹性伺服响应,消除由于电子漂移或重力引起的与目标位置的小偏差的振荡。 位置信息通过来自电动机的正交编码转速计脉冲提供给处理器。