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1. 发明授权

US5408591A Automatic calibration and servo control scheme for offsetting mechanical and electronic component variances 失效
标题翻译：自动校准和伺服控制方案，用于抵消机械和电子部件的差异
公开(公告)号：US5408591A
公开(公告)日：1995-04-18
申请号：US891573
申请日：1992-06-01
申请人： Liang Shih , August D. Coby
发明人： Liang Shih , August D. Coby
IPC分类号： G05B19/401 , G05B19/18 , G06K5/00
CPC分类号： G05B19/4015 , G05B2219/39549 , G05B2219/41029 , G05B2219/41095 , G05B2219/41118 , G05B2219/41206
摘要： In a mechanical device in which a member is moved by an electrical actuator through an electronic and mechanical linkage, apparatus for compensating for changes in system gain to allow precision movement with non-precision components. There a sensor for accurately determining positions of the member, control logic connected to provide a control signal to the actuator, and an adjustable gain control for adjusting the gain of the control signal. Compensation logic is connected to receive positional signals from the sensor, for applying a control signal to the actuator to move the member to a target position closest to a desired final position, for adjusting the gain of the control signal with the adjustable gain control until the member is located at the target position within acceptable tolerance limits, and for then employing that gain to move the member to the desired final position. The method associated with the apparatus can be done in real-time or by pre-calibrating in advance. When pre-calibrating, there is a look-up table containing a plurality of pre-established gains associated with respective ones of a plurality of target positions and the compensation logic selects a gain from the look-up table employs the gain to move the member directly to the desired final position.
摘要翻译：在其中通过电子和机械联动装置通过电致动器移动构件的机械装置中，用于补偿系统增益的变化的装置，以允许使用非精密部件的精确运动。存在用于准确地确定构件位置的传感器，连接到控制信号以向致动器提供控制信号的传感器以及用于调节控制信号的增益的可调增益控制。连接补偿逻辑以接收来自传感器的位置信号，用于向致动器施加控制信号以将构件移动到最接近所需最终位置的目标位置，用于利用可调增益控制来调节控制信号的增益，直到成员位于可接受公差范围内的目标位置，然后使用该增益将构件移动到期望的最终位置。与设备相关的方法可以实时完成或者通过预先校准来完成。当预校准时，存在包含与多个目标位置中的各个相关联的多个预先建立的增益的查找表，并且补偿逻辑从查找表中选择增益采用增益来移动该成员直接到期望的最终位置。

2. 发明授权

US4965816A Digital logic circuit for incremental encoders 失效
标题翻译：用于增量式编码器的数字逻辑电路
公开(公告)号：US4965816A
公开(公告)日：1990-10-23
申请号：US361065
申请日：1989-06-05
申请人： Liang Shih , Clifford L. Skillings
发明人： Liang Shih , Clifford L. Skillings
IPC分类号： G05B19/21
CPC分类号： G05B19/21
摘要： A digital logic circuit for use with an incremental positioning encoder is presented. The circuit converts two quadrature pulse train signals, generated by an incremental position type encoder, to a counting CLOCK signal and an UP/DOWN count signal. The signals are transmitted on counters to generate counting clock signal and the UP/DOWN count position information. The circuit utilizes gate delays to detect the edge of a pulse train signal. No external clocks or comparators are nested. The design, by relying on the propagation delay of gates, keeps the circuit simple and more reliable.
摘要翻译：提出了一种用于增量定位编码器的数字逻辑电路。电路将由增量位置型编码器产生的两个正交脉冲串信号转换为计数时钟信号和上/下计数信号。信号在计数器上发送，以产生计数时钟信号和UP / DOWN计数位置信息。电路利用门延迟来检测脉冲序列信号的边沿。没有外部时钟或比较器嵌套。该设计通过依靠门的传播延迟，保持电路简单可靠。

3. 发明授权

US4857781A High-speed non-contact linear motor with magnetic levitation 失效
标题翻译：高速非接触线性电机带磁悬浮
公开(公告)号：US4857781A
公开(公告)日：1989-08-15
申请号：US218179
申请日：1988-07-13
申请人： Liang Shih
发明人： Liang Shih
IPC分类号： H02K33/18 , H02K7/09 , H02K41/035
CPC分类号： H02K7/09 , H02K41/0356
摘要： A linear brushless DC motor is provided with a stationary member and a movable member each having opposing pole faces. A first magnetic device operates to displace the movable member translationally with respect to the stationary member. A second magnetic device which has electromagnet windings wound around each of the pole faces operates to levitate the movable member by magnetic attractive force with respect to the stationary member. A control system is used for maintaining a certain air gap between the movable member and the stationary member.

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