Engine brake control apparatus and method
    1.
    发明授权
    Engine brake control apparatus and method 失效
    发动机制动控制装置及方法

    公开(公告)号:US5121723A

    公开(公告)日:1992-06-16

    申请号:US677651

    申请日:1991-03-29

    IPC分类号: F02D13/04

    CPC分类号: F02D13/04

    摘要: An electronic microcomputer based engine brake control device and a method for controlling an engine compression brake is disclosed. An algorithm for enabling engine brake operation includes monitoring a brake enable switch, engine RPM, engine fueling rate, cruise control or power takeoff system activation state, throttle position, manifold pressure and clutch pedal position. Engine brake operation is fully automatic and operates in a safe manner according to the disclosed algorithm.

    摘要翻译: 公开了一种基于电子微型计算机的发动机制动控制装置和发动机压缩制动器的控制方法。 用于启动发动机制动操作的算法包括监视制动使能开关,发动机转速,发动机加油速率,巡航控制或动力输出系统启动状态,节气门位置,歧管压力和离合器踏板位置。 发动机制动操作是全自动的,并且根据所公开的算法以安全的方式操作。

    Method and device for computing a stabilized vehicle speed value from a
pulse signal
    2.
    发明授权
    Method and device for computing a stabilized vehicle speed value from a pulse signal 失效
    用于从脉冲信号计算稳定的车速值的方法和装置

    公开(公告)号:US5243523A

    公开(公告)日:1993-09-07

    申请号:US677653

    申请日:1991-03-29

    IPC分类号: B60K31/04 G01P3/489

    摘要: A method is provided for computing a stabilized vehicle speed value from a detected vehicle speed pulse signal and a detected engine speed signal, the vehicle speed value being for use by a vehicle speed control system. The method comprises several continuous cyclic steps commncing with generating a measured vehicle speed value from the detected vehicle speed pulse signal and generating a measured engine speed value from the detected engine speed signal. A current gear ratio is calculated from the measured vehicle speed value and the measured engine speed value. This current gear ratio is then passed through a single pole digital filter to filter changes in the gear ratio between consecutive cycles as a function of the current gear ratio and the gear ratio computed in the last preceding cycle of the computation. A current usable gear ratio is generated which is changed from the most recently generated usable gear ratio only if changes in the gear ratio exceed predetermined limit values. Otherwise the current usable gear ratio is unchanged from its most recently generated value. A stabilized predicted vehicle speed value is then computed from the measured engine speed and the current usable gear ratio for use by the vehicle speed control system. Slew rate limiting of the predicted vehicle speed is also provided by the method.

    摘要翻译: 提供了一种用于根据检测到的车速脉冲信号和检测到的发动机速度信号计算稳定的车速值的方法,车速值由车速控制系统使用。 该方法包括几个连续循环步骤,从检测到的车速脉冲信号产生测量的车辆速度值,并根据检测到的发动机转速信号产生测量的发动机转速值。 根据测量的车速值和测量的发动机转速值计算当前齿轮比。 该当前齿轮比然后通过单极数字滤波器,以根据当前齿轮比和在计算的最后一个循环中计算的齿轮比来滤除连续循环之间的齿轮比的变化。 产生当前可用的齿轮比,其仅当齿轮比的变化超过预定极限值时才从最近产生的可用齿轮比改变。 否则,当前可用的传动比与其最近产生的值不变。 然后根据测量的发动机转速和当前可用的变速比来计算稳定的预测车速值以供车速控制系统使用。 通过该方法也提供了预测车速的限制转速。

    Bowstring release safety mechanism
    3.
    发明授权
    Bowstring release safety mechanism 失效
    弓弦释放安全机制

    公开(公告)号:US5184596A

    公开(公告)日:1993-02-09

    申请号:US831156

    申请日:1992-02-05

    IPC分类号: F41B5/18

    CPC分类号: F41B5/1469

    摘要: This invention provides a safety mechanism as an improvement to a bowstring release device and operative to prevent the accidental discharge of an arrow drawn in the bow. The safety mechanism disclosed comprises a slidable cam which is adapted to actuate a lock pin into a position to block the movement of a trigger member of the bowstring release device. When the safety mechanism is moved in the opposite direction, the lock pin is allowed to move away from the position blocking trigger movement under pressure of a biasing spring, thus freeing the trigger to operate.

    摘要翻译: 本发明提供了一种安全机构,作为对弓弦释放装置的改进,并且可操作以防止在弓中绘制的箭头的意外排出。 所公开的安全机构包括可滑动的凸轮,其适于致动锁定销到阻止弓弦释放装置的触发构件的运动的位置。 当安全机构沿相反的方向移动时,允许锁定销远离在偏置弹簧的压力下阻止触发器移动的位置,从而释放触发器的操作。

    Spacecraft disturbance compensation using feedforward control
    4.
    发明授权
    Spacecraft disturbance compensation using feedforward control 失效
    使用前馈控制的航天器扰动补偿

    公开(公告)号:US5517418A

    公开(公告)日:1996-05-14

    申请号:US352286

    申请日:1994-12-08

    CPC分类号: G05D1/0883 B64G1/24 B64G1/36

    摘要: A feedforward disturbance compensation system and method for use with a spacecraft that compensates for predictable disturbances exerted on the spacecraft. The invention comprises a model of the disturbance that is to be compensated, means for knowing when the disturbance will occur, and means for applying the feedforward compensation to the spacecraft in accordance with the model (a compensation profile). The present invention reduces pointing transients through the application of open-loop, feedforward compensation of actuators used to point the spacecraft. The shape of the feedforward profile is determined by an in-orbit test or is predicted by analytical means. For the in-orbit test case that compensates for an eclipse, for example, the spacecraft is flown through the eclipse once to determine the size and shape of the thermal shock disturbance and this information is stored in a spacecraft control processor. The application of the feedforward compensation is synchronized with the start and end of each day's eclipse. This may be achieved by sensing the change in battery discharge current that occurs in solar panels on the spacecraft, for example. On subsequent days, the invention anticipates the occurrence of the disturbance using the stored data. When the start or end of eclipse is detected, compensation for the expected disturbance is automatically applied to spacecraft actuators. The invention can also compensate for a large variety of known periodic disturbances other than thermal shock. These disturbances may be external or internal to the spacecraft. The present invention can also provide compensation by fine tuning the compensation magnitude and duration of the compensation, and is also applicable to both linear and nonlinear control systems.

    摘要翻译: 一种与航天器一起使用的前馈扰动补偿系统和方法,其补偿施加在航天器上的可预测的干扰。 本发明包括待补偿的干扰的模型,用于知道何时发生干扰的装置,以及根据模型(补偿简档)将前馈补偿应用于航天器的装置。 本发明通过应用用于指向航天器的致动器的开环前馈补偿来减少指向瞬变。 前馈曲线的形状由轨道内测试确定,或通过分析手段预测。 对于补偿日食的轨道测试案例,例如,航天器通过日食一次,以确定热冲击干扰的大小和形状,并将该信息存储在航天器控制处理器中。 前馈补偿的应用与每天日食的开始和结束同步。 这可以通过例如感测太空板上的太阳能电池板中发生的电池放电电流的变化来实现。 在随后的几天中,本发明使用所存储的数据来预期发生干扰。 当检测到日食的开始或结束时,预期扰动的补偿将自动应用于航天器执行器。 本发明还可以补偿除了热冲击以外的各种已知的周期性干扰。 这些扰动可能是航天器的外部或内部。 本发明还可以通过微调补偿的补偿幅度和持续时间来提供补偿,并且也适用于线性和非线性控制系统。

    Torpedo drag reduction employing polymer ejection
    5.
    发明授权
    Torpedo drag reduction employing polymer ejection 失效
    使用聚合物喷射的鱼雷减阻

    公开(公告)号:US4186679A

    公开(公告)日:1980-02-05

    申请号:US441002

    申请日:1965-03-17

    IPC分类号: B01F5/04 F42B19/12 F42B19/00

    CPC分类号: F42B19/125 B01F5/0473

    摘要: Method and apparatus for reducing torpedo drag in which polymer drag redug material is carried by the torpedo in concentrated form, ambient water is ingested and mixed with the concentrated polymer to produce a seawater-polymer solution of predetermined concentration, and the solution is ejected from the torpedo nose to be swept rearwardly in intimate contact with the exterior surface of the torpedo under torpedo forward motion.

    摘要翻译: 降低鱼雷阻力的方法和装置,其中聚合物减阻材料由鱼雷以浓缩形式携带,环境水被摄取并与浓缩聚合物混合以产生预定浓度的海水 - 聚合物溶液,溶液从 在鱼雷向前运动的情况下,与鱼雷外表面紧密接触的鱼雷鼻向后扫。

    Transient-free method of determining satellite attitude
    6.
    发明授权
    Transient-free method of determining satellite attitude 失效
    确定卫星姿态的无瞬间方法

    公开(公告)号:US5452077A

    公开(公告)日:1995-09-19

    申请号:US164592

    申请日:1993-12-09

    申请人: James H. Green

    发明人: James H. Green

    IPC分类号: G01C21/24 G01S3/784 G01B11/26

    CPC分类号: G01C21/24 G01S3/784

    摘要: A method of spacecraft attitude determination is proposed which calculates the bias between the usual two-cell and four-cell earth sensor measurements. During period of sun or moon interference, when the two-cell mode is selected, this bias is added to or subtracted from the two-cell measurements. This removes the step change in the calculated spacecraft roll and pitch angles when the switch is made between two and four cell modes and allows a substantially more accurate measurement to be obtained from a given sensor for the period of time for which interference would otherwise reduce sensor performance.

    摘要翻译: 提出了一种航天器姿态测定方法,用于计算通常的两单元和四单元地球传感器测量之间的偏差。 在太阳或月亮干扰期间,当选择双电池模式时,将该偏压加到或从两电池测量中减去。 这消除了开关在两个和四个单元模式之间计算的航天器滚动和俯仰角度的阶跃变化,并且允许从给定的传感器获得基本上更精确的测量,持续一段时间,否则干扰将会降低传感器 性能。

    Spacecraft methods and systems for autonomous correction of star tracker charge-transfer-efficiency errors
    7.
    发明授权
    Spacecraft methods and systems for autonomous correction of star tracker charge-transfer-efficiency errors 有权
    航天器方法和系统,用于自动校正星形跟踪器电荷转移效率误差

    公开(公告)号:US06460809B1

    公开(公告)日:2002-10-08

    申请号:US09769637

    申请日:2001-01-25

    IPC分类号: B64G136

    摘要: Structures and methods are provided for deriving corrected star coordinates Ccrctd from measured star coordinates Cms that include star tracker charge transfer efficiency (CTE) errors. The structures and methods are based on a recognition that measured star coordinates Cms of star image centroids include CTE errors which are functions of the CCD path lengths over which the associated electrical charges traveled. In particular, the errors are substantially a product of a respective path length and a star-coordinate error factor &xgr; which, in turn, is a function of the star image magnitudes msi. Information contained in different measured star coordinates Cms is organized to facilitate the derivation of an estimate &xgr;* of the star-coordinate error factor &xgr; with conventional estimation processes. The measured star coordinates Cms are then corrected with the error factor estimate &xgr;* to realize the corrected star coordinates Ccrctd and, thereby, improve the accuracy of spacecraft attitude control.

    摘要翻译: 提供了结构和方法,用于从包括星形跟踪器电荷转移效率(CTE)误差的测量的星座坐标Cms导出校正星座标Ccrctd。 结构和方法基于识别,星形图像质心的测量星座坐标Cms包括作为相关电荷行进的CCD路径长度的函数的CTE误差。 特别地,误差基本上是相应的路径长度和星坐标误差因子&xgr的乘积; 这又是星形图像幅度msi的函数。 包含在不同测量星座坐标Cms中的信息被组织以便于推导星坐标误差因子&xgr的估计&xgr * 与传统的估计过程。 然后用误差因子估计&xgr *来校正测量的星座Cms,以实现校正的星座Ccrctd,从而提高航天器姿态控制的精度。

    Water reactive underwater warhead
    8.
    发明授权
    Water reactive underwater warhead 失效
    水反应性水下弹头

    公开(公告)号:US4188884A

    公开(公告)日:1980-02-19

    申请号:US385561

    申请日:1964-07-27

    CPC分类号: F42B22/00 F42B12/50 F42B21/00

    摘要: 1. Apparatus for inflicting explosive damage upon an underwater object, crising;(a) an encapsulated charge of a first material which is highly reactive with water, said first charge being for explosively reacting with the water to produce a gas bubble which sequentially expands to a predetermined peak size and then contracts,(b) explosive means for bursting the encapsulated charge in a manner in which the bursted particles of said first materials are dispersed in directions symmetrically outward from the center of the charge to cause the bursted particles of said bursted material to penetrate the ambient water with a symmetric and uniformly dense pattern of penetration, and thereby obtain effective and complete explosive reaction between said first material and the water medium and produce said peak size of bubble, and(c) means for initiating said explosive means for bursting the encapsulated charge when said charge is sufficiently close to the object that a material portion of the bubble front is in contact with the surface of the object when the bubble reaches its peak size,whereby upon contraction of the gas bubble a re-entrant jet of ambient water enters the bubble in a direction normal to the surface of the object to exert a punch-like force thereagainst.

    摘要翻译: 1.一种用于对水下物体造成爆炸伤害的装置,包括: (a)与水具有高度反应性的第一种材料的包封装料,所述第一电荷用于与水爆炸反应以产生依次膨胀至预定峰值尺寸然后收缩的气泡,(b)爆炸装置,用于 以所述第一材料的爆裂颗粒从电荷中心对称分布的方式破裂所述封装的电荷,以使所述爆裂材料的爆裂颗粒以对称和均匀致密的图案渗透到环境水中 渗透,从而在所述第一材料和水介质之间获得有效和完全的爆炸反应,并产生所述气泡的峰值大小,和(c)用于启动所述爆炸装置以在所述电荷充分接近物体时爆破包封的电荷的装置 当气泡到达时,气泡前缘的材料部分与物体的表面接触 其峰值尺寸,由此在气泡收缩时,周围水的重入射流沿着垂直于物体表面的方向进入气泡,以在其上施加冲击力。