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5 条记录 (耗时 0.019 秒)

    Draft control system with closed loop drop/raise rate control
    1.
    发明授权
    Draft control system with closed loop drop/raise rate control 失效
    牵引控制系统具有闭环下降/提升速率控制

    公开(公告)号：US5320186A

    公开(公告)日：1994-06-14

    申请号：US757173

    申请日：1991-09-10

    申请人： Richard P. Strosser ,  Charles R. Cornell ,  James W. Macqueene

    发明人： Richard P. Strosser ,  Charles R. Cornell ,  James W. Macqueene

    IPC分类号： A01B63/112 ,  A01B63/114 ,  B60D1/42 ,  E02F9/20 ,  A01B63/10

    CPC分类号： A01B63/112 ,  A01B63/114 ,  B60D1/42 ,  E02F9/2029

    摘要： In an automatic draft control system for positioning a hitch, velocity feedback loop techniques are employed to control the rate of movement of the hitch. When the system is operating in an open loop position control mode, a switch mounted on a tractor fender enables an operator to manually control raising/lowering of the hitch for the purpose of attaching an implement. Hitch position is sensed and a microprocessor calculates the first derivative of the hitch position signal to determine actual hitch velocity. The actual velocity is subtracted from a desired velocity value to obtain a velocity error signal. The error signal is subjected to an integral control algorithm and the integrated value is used to energize raise or lower solenoids controlling a valve which raises or lowers the hitch. When the actual hitch velocity is equal to or greater than the desired hitch velocity, the integrated value is saved. When the next raise/lower sequence is initiated the integrator is reset to the saved value. This eliminates delays in starting hitch motion. The desired velocity value may be derived from the setting of a drop rate potentiometer in which case a drop rate value is added to the integrated error signal with the result being used to modify a hitch movement command that energizes the "lower" solenoid, thereby limiting the hitch drop rate when the system is operating in a closed loop position/draft control mode.

    摘要翻译： 在用于定位搭接的自动牵伸控制系统中，采用速度反馈回路技术来控制搭接的移动速度。 当系统工作在开环位置控制模式时，安装在拖拉机挡泥板上的开关使得操作者能够手动地控制挂钩的升高/降低以便附接工具。 感测到挂钩位置，微处理器计算挂钩位置信号的一阶导数以确定实际牵引速度。 从所需速度值中减去实际速度，以获得速度误差信号。 误差信号经受积分控制算法，并且积分值用于激励控制升高或降低牵引力的阀的升高或下降螺线管。 当实际牵引速度等于或大于所需牵引速度时，积分值被保存。 当启动下一个升/降序列时，积分器将重置为保存的值。 这消除了启动牵引运动的延迟。 期望的速度值可以从下降速率电位计的设定中导出，在这种情况下，将下降速率值加到积分误差信号上，结果用于修改对“下”螺线管通电的牵引运动指令，从而限制 系统在闭环位置/牵引控制模式下运行时的牵引降速率。

    Clutch pedal positon sensor continuous calibration
    3.
    发明授权
    Clutch pedal positon sensor continuous calibration 失效
    离合器踏板定位传感器连续校准

    公开(公告)号：US5161405A

    公开(公告)日：1992-11-10

    申请号：US709186

    申请日：1991-06-03

    申请人： James W. Macqueene

    发明人： James W. Macqueene

    IPC分类号： B60K23/02 ,  F02D11/10 ,  F16H59/18 ,  F16H61/12 ,  G01D3/024 ,  G01D18/00

    CPC分类号： F16H59/18 ,  B60K23/02 ,  F02D11/106 ,  G01D18/002 ,  G01D18/008 ,  G01D3/024 ,  B60W2540/14 ,  B60Y2200/14 ,  F02D2250/16 ,  F16H2061/1208

    摘要： A non-volatile memory stores values defining a released position or a depressed position of a clutch pedal. A potentiometer mechanically linked to the clutch pedal produces an output signal whose value or magnitude represents the current position of the clutch pedal. When power is turned on, first and second end limit values which electrically define the depressed and released positions of the clutch pedal are read from the memory, a constant value is added to the first end limit value and subtracted from the second. Thereafter, each time the output signal is sensed for control purposes, the output signal is compared with the end limit values. If the output signal is less than the first end limit value it replaces that value in the memory and if the output signal is greater than the second end limit value it replaces that value. The sensor is thus calibrated in a manner transparent to the operator each time the system samples the sensor output signal for control purposes. When either end limit value is changed, threshold values representing specified positions of the clutch pedal relative to its released or depressed position are recalculated and stored for subsequent use as control values.

    摘要翻译： 非易失性存储器存储限定离合器踏板的释放位置或压下位置的值。 机械连接到离合器踏板的电位器产生一个输出信号，其值或幅度表示离合器踏板的当前位置。 当接通电源时，从存储器中读取电气限定离合器踏板的压下和释放位置的第一和第二端限值，将一个常数值加到第一个终止值并从第二个极限值中减去。 此后，为了控制目的每次检测输出信号时，将输出信号与终止值进行比较。 如果输出信号小于第一个限制值，它将代替存储器中的该值，如果输出信号大于第二个限制值，则替换该值。 因此，为了控制目的，每当系统采样传感器输出信号时，传感器以对操作者透明的方式进行校准。 当任一端限值改变时，重新计算表示离合器踏板相对于其释放或按压位置的指定位置的阈值，以供后续使用作为控制值。

    Hitch positioning with slip override control and calibrated wheel speed for determining slip
    5.
    发明授权
    Hitch positioning with slip override control and calibrated wheel speed for determining slip 失效
    通过滑移倍率控制和校准车轮速度进行定位，以确定滑差

    公开(公告)号：US5190111A

    公开(公告)日：1993-03-02

    申请号：US709237

    申请日：1991-06-03

    申请人： Steven C. Young ,  Bradley A. Nielsen ,  James W. Macqueene ,  Garrett E. Swierenga

    发明人： Steven C. Young ,  Bradley A. Nielsen ,  James W. Macqueene ,  Garrett E. Swierenga

    IPC分类号： A01B63/112 ,  A01B63/114 ,  B60D1/42 ,  E02F9/20

    CPC分类号： E02F9/2029 ,  A01B63/112 ,  A01B63/114 ,  B60D1/42

    摘要： An automatic draft control for controlling the position of a tractor-mounted hitch includes a slip override circuit responsive to a wheel signal for modifying a hitch position command so that hitch draft is reduced by raising the hitch when the degree of tractor wheel slip exceeds a threshold value. The slip is determined by measuring theoretical (no-slip) ground speed with a sensor which senses the rate of rotation of the tractor rear axle, and measuring true ground speed with a radar unit mounted on one side of the tractor. Because the radar unit does not indicate the speed of the center line of the tractor as it turns, the slip signal is prevented from modifying the hitch position command if the hitch is raised since the hitch is usually raised when turning and there is no need to modify the position command with the slip signal when the hitch is raised. The true ground speed is automatically and repeatedly divided by the rate of rotation of the tractor rear axle when conditions are such that wheel slippage is unlikely. The multiple divisions produce plural indications of a correction factor. These indications are filtered to obtain a correction factor which accounts for variations in the effective rolling radius of the wheels. Once the correction factor has been determined it is applied to the wheel speed sensor output to calculate the theoretical ground speed of the vehicle.

    摘要翻译： 用于控制牵引车安装的牵引车的位置的自动牵伸控制包括滑移覆盖电路，其响应于用于修改牵引位置指令的车轮信号，从而当拖拉机车轮滑动的程度超过阈值时通过提高牵引力来减小牵引牵伸 值。 通过用感测拖拉机后桥的旋转速度的传感器测量理论（无滑差）地面速度，以及安装在拖拉机一侧的雷达单元测量真实地面速度来确定滑差。 因为雷达单元没有指示拖拉机的中心线的转速，所以如果挂起升高，则阻止滑行信号修改搭接位置指令，因为在转弯时通常抬起挂钩并且不需要 当挂起提升时用滑差信号修改位置指令。 当条件使得滑轮不太可能时，真实的地面速度被自动重复地除以拖拉机后桥的旋转速度。 多个分割产生修正因子的多个指示。 这些指示被过滤以获得考虑到轮的有效滚动半径的变化的校正因子。 一旦确定了校正因子，就将其应用于车轮速度传感器输出，以计算车辆的理论地面速度。