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    • 31. 发明申请
    • ELIMINATION OF UNINTENDED VELOCITY REVERSALS IN S-CURVE VELOCITY PROFILES
    • 消除S曲线速度轮廓中意外的速度反转
    • US20080180045A1
    • 2008-07-31
    • US11668111
    • 2007-01-29
    • BOHUMIR SLADEKJacob Strickler Baker
    • BOHUMIR SLADEKJacob Strickler Baker
    • H02P7/00
    • G05B19/416G05B2219/41408G05B2219/49182
    • A method is employed to eliminate undesired velocity reversal in a motion profile. A start speed, a start acceleration, a speed limit, an acceleration limit, a deceleration limit, an acceleration jerk limit, and a deceleration jerk limit are programmed for the motion profile. A critical jerk value needed to avoid velocity reversal associated with the motion profile is calculated. The critical jerk value is compared to the programmed deceleration jerk limit. The larger of the critical jerk value and the programmed deceleration jerk limit is set as a computed maximum deceleration jerk limit for use with the motion profile. In this manner, the computed maximum deceleration jerk limit will never be lower than the critical jerk and undesired velocity reversal is eliminated.
    • 采用一种方法来消除运动曲线中不期望的速度反转。 为运动曲线编程起动速度,启动加速度,速度限制,加速限制,减速限制,加速度加加速度极限和减速跳转极限。 计算避免与运动曲线相关的速度反转所需的临界加加速度值。 将临界加加速度值与编程的减速跳转限制进行比较。 临界加加速度值和编程减速冲击极限值越大,就被设置为运动曲线使用的计算出的最大减速冲击极限。 以这种方式,计算出的最大减速冲击极限将永远不会低于临界冲击,消除不期望的速度反转。
    • 34. 发明授权
    • Multi-axis contouring control system
    • 多轴轮廓控制系统
    • US4262336A
    • 1981-04-14
    • US34102
    • 1979-04-27
    • Eric K. Pritchard
    • Eric K. Pritchard
    • G05B19/414G05B19/42G05B19/417G05B19/40G05B19/403
    • G05B19/42G05B19/4141G05B2219/33337G05B2219/33342G05B2219/34002G05B2219/34149G05B2219/34157G05B2219/34164G05B2219/34167G05B2219/34179G05B2219/35369G05B2219/35436G05B2219/41326G05B2219/41408G05B2219/43006G05B2219/45176
    • In a numerically controlled machine includes a first computer which stores command data for a path and derives sets of interpolation point data from said command data for a plurality of points along the path. A second computer stores two sets of interpolation point data from said first computer and extrapolates a set of said stored interpolation point data by incrementing velocity with acceleration and position with velocity using a noncircular high order polynomial to produce a sequence of driver command signals.A timing means provides timing signals to the second computer to determine the number and rate of iterations of drive command signals in said sequence as predetermined by the first computer for each set of interpolation point data.The program execution time in the second computer is reduced by a unique method of multiprecision calculation which requires a carry flip flop for each variable calculated and a sign flip flop for eliminated word segments. The memory address decoding for the two sets of interpolation print data are interchanged after each sequence invisibly to the computers. An index register causes data memory address decoding for a plurality of motor drivers invisible to the computers and selects an output to the appropriate motor driver. The second computer includes a manual mode program to calculate the sequence of driver command signals using a manually induced velocity vector. A phased locked loop in the timing means controllably reduces the iteration rate to zero in response to an error signal.
    • 在数控机器中包括第一计算机,其存储用于路径的命令数据,并根据来自所述路径的多个点的所述命令数据导出插值点数据集。 第二计算机存储来自所述第一计算机的两组内插点数据,并且通过使用非圆形高阶多项式使用加速度和位置速度递增速度来外推一组所述存储的插值点数据,以产生一系列驱动器命令信号。 定时装置向第二计算机提供定时信号,以确定由第一计算机为每组内插点数据预定的所述序列中的驱动命令信号的迭代次数和速率。 第二台计算机中的程序执行时间通过一种独特的多精度计算方法来减少,该方法需要为每个计算的变量执行一个进位触发器和一个用于消除的字段的符号触发器。 用于两组插值打印数据的存储器地址解码在每个序列之后被不可见地交换到计算机。 索引寄存器对计算机不可见的多个电动机驱动器进行数据存储器地址解码,并选择到适当的电动机驱动器的输出。 第二台计算机包括一个手动模式程序,用手动感应的速度矢量来计算驾驶员指令信号的顺序。 定时装置中的相位锁定环可以根据误差信号可控地将迭代速率降低到零。
    • 37. 发明公开
    • Servomotor controller
    • 伺服电机控制器
    • EP1437637A2
    • 2004-07-14
    • EP04250027.2
    • 2004-01-06
    • FANUC LTD
    • Iwashita, YasusukeKawamura, Hiroyuki
    • G05D3/14
    • G05B19/39G05B19/404G05B2219/41251G05B2219/41408G05B2219/41421G05B2219/41431G05B2219/41445
    • A controller capable of preventing response delay and generation of vibrations attributable thereto during position control of a movable part of a machine having low rigidity. A motor for driving a machine having low rigidity is subjected to position and velocity loop control. Compensation amount Q 1 proportional to command velocity obtained by differentiating a position command and compensation amount Q 2 proportional to second-order differentiated command acceleration are obtained. Compensation amounts Q 1 and Q 2 are added together, thus obtaining a velocity offset amount Vof corresponding to a estimated torsion amount. A differentiated value of the velocity offset amount is multiplied by coefficient β to obtain a torque offset amount Tof. The velocity offset amount Vof is added to a velocity command Vcs obtained by position loop control 1. The torque offset amount Tof is added to a torque command Tc outputted in velocity loop control 2, and the result is used as a drive command to the motor. Based on the velocity and the, torque offset amount Vof and Tof, a torsion amount between motor 3 and the machine is controlled. The machine position and velocity are controlled with accuracy by regular position and velocity loop control.
    • 本发明提供一种能够防止刚性低的机械的可动部的位置控制时的响应延迟及由此产生的振动的控制装置。 用于驱动具有低刚性的机器的电动机受到位置和速度回路控制。 获得与通过对与二阶微分指令加速度成比例的位置指令和补偿量Q2进行微分而获得的指令速度成比例的补偿量Q1。 将补偿量Q1和Q2加在一起,从而获得对应于估计的扭转量的速度偏移量Vof。 速度偏移量的微分值乘以系数β以获得转矩偏移量Tof。 速度偏移量Vof被加到通过位置环控制1获得的速度指令Vcs上。转矩偏移量Tof被加到在速度环控制2中输出的转矩指令Tc,并且该结果被用作对电动机的驱动指令 。 基于速度和转矩偏移量Vof和Tof,控制马达3和机器之间的扭转量。 定位和速度环控制可精确控制机器位置和速度。