Control unit for controlling a system with several coupled variables

    公开(公告)号:US06571135B2

    公开(公告)日:2003-05-27

    申请号:US09828238

    申请日:2001-04-09

    IPC分类号: G05B1302

    摘要: For controlling multivariable systems, a control unit for controlling a system with several coupled control variables. The control unit includes controllers (10, 11) having associated control variables (x1, x2) as well as a decoupling network. The decoupling network is connected upstream from the system and includes at least one first decoupling member (12). A first output variable (y1) of a first one of the controllers (10) is routed to the first decoupling member (12). The first decoupling member generates a first correcting quantity (14) for a second output variable (y2) of a second one of the controllers (11). The second controller (11) has a PI- or PID-controller core (40) and is configured such that integrator windup is eliminated when the second output variable (y2) corrected with the first correcting quantity (14) reaches a manipulated variable limit. Bumpless manual/automatic changeover of the controller is also made possible.

    Temperature control in extruders
    2.
    发明授权
    Temperature control in extruders 失效
    挤出机的温度控制

    公开(公告)号:US5614137A

    公开(公告)日:1997-03-25

    申请号:US218829

    申请日:1994-03-28

    CPC分类号: B21C31/00

    摘要: A process for the cyclic control of extruders which facilitates the precise control of an extruder to achieve maximum output and at the same time optimal quality of the extruded profiles. Accordingly therefore the extrusion velocity is controlled in such a way that the profile exit temperature is constant and equal to a prescribed temperature trajectory. Thereby the extrusion velocity and the profile exit temperature are measured over the complete cycle interval for each and every cycle k, and with the knowledge of the relationship between these quantities and the trajectory of the extrusion velocity of the cycle k, the trajectory of the extrusion velocity for the (k+1)th cycle is determined, such that the control error and the control effort are as low as possible and after completion of the (k+1)th extrusion cycle the whole process is repeated for every subsequent cycle therefore until the whole extrusion program is completed. The process is especially suited for the manufacture of extruded profiles of metals with low and/or wavelength dependent emmissivity and/or variable surface characteristics, in particular for the manufacture of extruded aluminium and aluminium alloy profiles.

    摘要翻译: 用于挤出机的循环控制的方法,其有助于挤出机的精确控制以实现最大输出,同时挤出型材的最佳质量。 因此,因此挤出速度被控制成使得轮廓出口温度恒定并且等于规定的温度轨迹。 因此,在每个循环k的整个循环间隔内测量挤出速度和轮廓出口温度,并且通过知道这些量与循环k的挤出速度的轨迹之间的关系,挤出轨迹 确定第(k + 1)个循环的速度,使得控制误差和控制力尽可能低,并且在第(k + 1)个挤出循环完成之后,对于每个后续循环重复整个过程 直到整个挤出程序完成。 该方法特别适用于制造具有低和/或波长依赖的发射率和/或可变表面特性的金属的挤出型材,特别是用于制造挤出的铝和铝合金型材。

    Method and device for a pulsation-free, continuous and gravimetric dosing
    3.
    发明授权
    Method and device for a pulsation-free, continuous and gravimetric dosing 失效
    无脉动,连续和重量计量的方法和装置

    公开(公告)号:US5046569A

    公开(公告)日:1991-09-10

    申请号:US614131

    申请日:1990-11-16

    IPC分类号: G01G11/08

    CPC分类号: G01G11/08

    摘要: The gravimetric control of a mass flow from or into a container located on a balance using a pulsating dosing pump, the output signal of the balance is digitally filtered in such a manner that the course in time of the mass flow is cyclically estimated from the filtered wighing signal. This estimated value of the course in time of the mass flow is used to calculate the course in time of an auxiliary mass flow which compensates the pulsation of the mass flow of the pulsating dosing pump and a speed course is calculated from the course in time of the auxiliary mass flow for driving an auxiliary dosing pump.

    摘要翻译: 使用脉动计量泵从位于天平的容器或进入容器的质量流量的重量控制,天平的输出信号以这样一种方式进行数字过滤,即质量流动时间的过程是从过滤的 信号信号 该质量流量时间的估计值用于计算辅助质量流量的时间过程,其补偿脉动计量泵的质量流量的脉动,并且从当前时间的过程计算速度过程 用于驱动辅助计量泵的辅助质量流。

    Receiving circuit in an interference-suppressing communications system
comprising narrow-band conventional message modulation and additional
pseudo-noise phase shift keying
    4.
    发明授权
    Receiving circuit in an interference-suppressing communications system comprising narrow-band conventional message modulation and additional pseudo-noise phase shift keying 失效
    一种干扰抑制通信系统中的接收电路,包括窄带常规消息调制和附加伪噪声相移键控

    公开(公告)号:US4327438A

    公开(公告)日:1982-04-27

    申请号:US102644

    申请日:1979-12-12

    CPC分类号: H04L7/043 H04B1/707 H04B7/216

    摘要: A receiving circuit for an interference-suppressing communications system having a narrow-band conventional message modulation and additional pseudo-noise phase shift keying (PN-PSK), has a pseudo-random generator whose pseudo-random sequence is identical to the pseudo-random sequence provided by the system transmitter. The pseudo-random generator actuates a phase-shift keying element to cancel the phase shift modulation produced at the transmitter. A matched filter or correlation network for correlation of the pseudo-random sequence at the receiver with the pseudo-random sequence contained in the received signal is provided. The message modulation impairs the function of the matched filter or the correlation network. The degrading influence of message modulation is to be eliminated, at least, reduced. To this end, a demodulation circuit is provided which receives the entire received signal and the signal present after removal of the phase-shift keying to provide an input for the matched filter or correlation network. This signal only exhibits the pseudo-noise phase-shift keying contained in the received signal, but no longer has the message modulation.

    摘要翻译: 具有窄带常规消息调制和附加伪噪声相移键控(PN-PSK)的干扰抑制通信系统的接收电路具有伪随机序列与伪随机序列相同的伪随机生成器 序列由系统发射机提供。 伪随机发生器启动相移键控元件以消除在发射机处产生的相移调制。 提供了一种用于接收机处的伪随机序列与包含在接收信号中的伪随机序列相关的匹配滤波器或相关网络。 消息调制会损害匹配滤波器或相关网络的功能。 消息调制的降级影响至少要减少。 为此,提供一种解调电路,其接收整个接收信号和去除相移键控之后存在的信号,以提供用于匹配滤波器或相关网络的输入。 该信号仅显示包含在接收信号中的伪噪声相移键控,但不再具有消息调制。

    Method for driving an electromagnetic actuator for operating a gas change valve
    5.
    发明授权
    Method for driving an electromagnetic actuator for operating a gas change valve 有权
    用于驱动用于操作气体切换阀的电磁致动器的方法

    公开(公告)号:US06234122B1

    公开(公告)日:2001-05-22

    申请号:US09440656

    申请日:1999-11-16

    IPC分类号: F01L904

    CPC分类号: F01L9/04 F01L2009/049

    摘要: In the case of known electromagnetic actuators each with at least one electromagnet acting on an armature, operational fluctuations of system parameters can lead to incorrect functioning, in particular to increased wear of the actuator, undesired noise generation, and excessive power consumption. In the new method, which is preferably used for operating gas change valves in internal combustion engines, the impact velocity of the armature on the electromagnet is automatically adjusted to a preset value. For this purpose, a controlled variable that depends on a change of inductance of the electromagnet is created as a measure of the impact velocity of the armature on The electromagnet and the controlled variable is adjusted by controlling the energy supply To the electromagnet to provide a setpoint value that the controlled variable adopts at a preset value of the impact velocity of the armature on the electromagnet. This permits reliable continuous duty with the new method.

    摘要翻译: 在已知的电磁致动器的情况下,每个电磁致动器都具有作用在电枢上的至少一个电磁体,系统参数的操作波动可导致不正确的功能,特别是增加致动器的磨损,不期望的噪声产生和过大的功率消耗。 在内燃机中优选用于操作气体换向阀的新方法中,电枢对电磁体的冲击速度被自动调整到预设值。 为此,产生依赖于电磁体的电感变化的受控变量作为电枢对电磁体的冲击速度的量度,并通过控制能量来调节受控变量。电磁铁提供设定值 控制变量采用电枢对电磁铁冲击速度的预设值的值。 这允许使用新方法可靠的连续工作。