摘要:
A system comprising a spray boom including a pair of boom assemblies, means for measuring the position of the boom assemblies relative to the ground, a stabilising device mounted on each boom assembly for stabilising and damping vertical movement of the spray boom, activating means connected to the stabilising device, and computer controlling means, wherein the stabilising device is configured as a block movable on a track along the length of the boom assembly thereby displacing the centre of gravity of the spray boom, the activating means capable of moving the block along the boom assembly, the computer controlling means receiving information from the means for measuring the position of the boom assemblies relative to the ground on the vertical movement of the pair of boom assemblies, whereby the computer controlling means controls the vertical position of the stabilising device through the activating means in response to received information.
摘要:
The invention relates to a vehicle vibration control system and a method of suppressing troublesome vibrations. The control system includes at least a first distributed active vibration electromagnetic force generator 30, at least a second distributed active vibration electromagnetic force generator 30, a plurality of electrical power distribution lines 40 and a distributed force generator data communications network 50.
摘要:
A vibration suppressor system includes a control system operable to control power from a power system to an actuator system in response to a minimal actuation power algorithm. The minimal actuation power algorithm employs a real electric power consumption of the actuator system as a single control objective function to suppress a vibration of the structure.
摘要:
Eine Steuereinrichtung (5) einer Bearbeitungsmaschine steuert einen Achsantrieb (4) der Bearbeitungsmaschine entsprechend einer Sollverfahrbewegung an. Eine mechanische Struktur (3) der Bearbeitungsmaschine wird dadurch entsprechend verfahren. Die Steuereinrichtung (5) ermittelt eine Absolutbewegung der mechanischen Struktur (3) im Raum und daraus unter Berücksichtigung der Sollverfahrbewegung der mechanischen Struktur (3) eine eine Schwingung der mechanischen Struktur (3) dämpfende Kompensationsbewegung (K*) für eine Ausgleichsmasse (7). Auf der mechanischen Struktur (3) ist ein Ausgleichsantrieb (8) angeordnet, der auf die Ausgleichsmasse (7) wirkt. Die Steuereinrichtung (5) steuert den Ausgleichsantrieb (8) entsprechend der Kompensationsbewegung (K*) an. Die Ausgleichsmasse (7) wird dadurch relativ zur mechanischen Struktur (3) entsprechend verfahren, die Schwingung der mechanischen Struktur (3) also gedämpft.
摘要:
A control mode for a damping force characteristic is set to be a variable control when a product of the sum x b ' of sprung member speeds and a sprung-member-unsprung-member-relative-speed x s ' is positive. Accordingly, when the vibration in a middle/high frequency range is not being input to a suspension apparatus SP, an operation of a variable throttle mechanism 30 is controlled in such a manner that a step number representing the damping force characteristic of a damper 20 varies in accordance with a vibration state of a sprung member HA based on a Nonlinear H ∞ control theory. Further, when the product of the sum x b ' of sprung member speeds and the sprung-member-unsprung-member-relative-speed x s ' is negative, the control mode is set to be an operation prohibiting control. Consequently, when the vibration in the middle/high frequency range is being input to the suspension apparatus SP, the operation of the variable throttle mechanism 30 is prohibited, and an increase in the operation frequency of or in the operation amount of the variable throttle mechanism 30 is therefore suppressed. Accordingly, the durability of the variable throttle mechanism 30 is improved.