摘要:
The invention relates to a method and a control unit (8) for guiding the displacement of a displaceable machine element (9) of a machine, said method comprising the following steps that are carried out in the control unit (8): a) input of a travel displacement (Xv) that is to be carried out by the machine element (9) and an optimisation criterion (OpK); b) determination of a displacement profile (Xsollk(t)) using the travel displacement that is to be carried out by the machine element (9) and the optimisation criterion (OpK), c) determination of a target position variable (Xsoll(n)) by means of the displacement profile (Xsollk(t)), d) output of the target position variable (Xsoll(n)) to a controller (6) for carrying out the travel displacement of the machine element (9). The invention provides a simple method and a simple control unit (8) for optimising the guidance of the displacement of a displaceable machine element (9) of a machine. The method permits a user to directly influence the optimisation of the travel displacement.
摘要:
The invention relates to a guiding device (3) for guiding a displaceable machine element (1) of a machine. Said guiding device (3) in connected in a mechanically fixed manner to a machine bed (4). A material measure (6) is arranged along at least one part of the guiding device (3) in order to determine a position of the machine element (1). The guiding device (3) and the material measure (6) can be displaced in relation to each other and at least one part of the material measure (6) is in contact with the guiding device (3) either directly or via a bearing (9). The inventive guiding device (3) enables the displaceable machine elements to be positioned in a precise manner even when the machine bed (4) is vibrated. The invention also relates to a machine comprising said type of guiding device (3).
摘要:
The excitation of an oscillation in a mechanical system, such as a machine element, subjected to a jerk can be suppressed or at least attenuated by rounding a corresponding jerk curve and/or by tuning the stop band of a bandstop filter to the characteristic frequencies of the mechanical system or machine element. In combination, both measures can improve the positioning accuracy while at the same time minimizing excitation of oscillations.
摘要:
In an injection-molding machine, the rapid traversing over long distances takes place with the aid of linear drives (L1, L2), the “rotor” (H1, H2) which is a component part of the machine construction.
摘要:
A method for reducing a current break in a leg of a three-phase block current-fed synchronous machine that is not participating in a commutation while the currents in the other two legs are commutating. A triangular high frequency sampling voltage from a pulse frequency generator of a control unit for the converter that feeds the synchronous machine is always shorted at the beginning of the commutation for a predetermined synchronization time. The torque ripple of a three-phase feed drive is reduced using this method and the circuit arrangement for carrying out the method.
摘要:
The invention relates to a drive (1) of a tail rotor (12) of a helicopter (10) by a permanently excited transversal flux machine in duplex arrangement in such a way that between two stators (4), which each have a toroidal winding system (8), there is arranged a disc-shaped impeller (5), which has permanent magnets (15) and on the outer circumference of which propeller blades (14) of the tail rotor (12) are arranged.
摘要:
A drive arrangement with a first motor and a second motor is described, the first and second motor being coupled via a first coupling unit. The first motor is provided to generate uniform low-frequency movements and the second motor performs a higher frequency alternating movement to be overlapped. The total movement is transmitted from the second motor to a machine component coupled via a second coupling unit. The first coupling unit is configured to transfer the uniform low-frequency movement of the first motor to the second motor, wherein a transmission of the higher frequency alternating movement of the second motor to the first motor is suppressed.
摘要:
A drive arrangement with a first motor and a second motor is described, the first and second motor being coupled via a first coupling unit. The first motor is provided to generate uniform low-frequency movements and the second motor performs a higher frequency alternating movement to be overlapped. The total movement is transmitted from the second motor to a machine component coupled via a second coupling unit. The first coupling unit is configured to transfer the uniform low-frequency movement of the first motor to the second motor, wherein a transmission of the higher frequency alternating movement of the second motor to the first motor is suppressed.
摘要:
The invention relates to a device for decoupling an attachment (7a, 7b, 7c, 7d) from a moving machine element (4) of a machine tool, production machine or of a robot. In order to carry out the decoupling, the attachment (7a, 7b, 7c, 7d) is joined to the machine element (4) via a damping device (13). The invention provides a simple device for decoupling an attachment from a moving machine element of a machine tool, production machine or of a robot.
摘要:
Parallel kinematics with rod guidance are nowadays used in machine tools, production machines and robotics. Changes in rod length caused by the special position of the moving work platform (P), by its acceleration and other force impact, can lead to positional errors. Such errors are eliminated by means of piezo-actuators (PA1–PA6) which are integrated into the rods (S1 to S6).