A vibration-centrifugation composite test apparatus and a control method thereof, the apparatus comprises: a centrifuge, an air-cooled electric vibration table and a control electrical cabinet the air-cooled electric vibration table comprises a vibration table main machine and a fan; a central axis of the moving coil in the vibration table main machine is on the same straight line as a horizontal center line of the rotation arm in the centrifuge; the fan is a horizontal fan and disposed above the center of the rotation arm, and a fan cover cabinet is mounted outside the horizontal fan; the control electrical cabinet is mounted above the fan cover cabinet, a power supply line of the control electrical cabinet is connected to a power supply through the conductive slip ring, and a vibration feedback signal line of the vibration table main machine is directly connected to the control electrical cabinet.

A vibration exciter with load compensation for the dynamic excitation of test specimens includes a base, an actuator, an armature which can be moved by the actuator in an excitation direction relative to the base and guided by a linear guiding element parallel to the excitation direction, and a pneumatic load compensator which compensates for the gravity force of at least the armature and the test specimen being excited. A high-quality low-perturbation exciter signal is generated by minimizing friction and other nonlinearities occurring during the load compensation. The linear guiding element of the vibration exciter with load compensation includes an air bearing, and the load compensator includes the linear guiding element.

Provided is an exciter device for fatigue testing of a blade of a wind turbine, including a actuator for generating a periodic excitation force and a coupling device for coupling the actuator to a blade to be tested. The exciter device includes a pretensioning device applying a pretension such that the excitation force only acts in a pulling or pushing direction over the whole period.

Provided is an exciter device for fatigue testing of a blade of a wind turbine, including a actuator for generating a periodic excitation force and a coupling device for coupling the actuator to a blade to be tested. The exciter device includes a pretensioning device applying a pretension such that the excitation force only acts in a pulling or pushing direction over the whole period.

A dynamic characteristic measurement device of the present invention includes magnetic force generators (1a, 1b, 2a, 2b) that are arranged on the back side of impellers (4, 5), the magnetic force, an oscillation controller (12) that drives these magnetic force generators, and vibration sensors (13, 14) that detect vibration of a rotation shaft (3). The dynamic characteristic measurement device further includes an arithmetic device (16) that calculates a dynamic characteristic of a rotor (6) by implementing a frequency analysis and a mode analysis based on an oscillation signal from the oscillation controller (12) and a vibration signal from the vibration sensors (13, 14).

To provide a characteristic measuring device capable of smoothly switch switching between a floating-mass state and a fixed state, while a predetermined pre-load is maintained. In a characteristic measuring device, a support part includes an air spring and a double fastening mechanism each arranged between a middle surface plate and a reaction-force section, the double fastening mechanism includes a first actuator fixed to the reaction-force section and a second actuator fixed to the middle surface plate, and the reaction-force section is not supported in the floating-mass state and is supported in the fixed state by the first actuator and the second actuator. In this way, a problem of the prior art (pre-load variation) is eliminated, and switching between the floating-mass state and the fixed state can be smoothly achieved.

To provide a characteristic measuring device capable of smoothly switch switching between a floating-mass state and a fixed state, while a predetermined pre-load is maintained. In a characteristic measuring device, a support part includes an air spring and a double fastening mechanism each arranged between a middle surface plate and a reaction-force section, the double fastening mechanism includes a first actuator fixed to the reaction-force section and a second actuator fixed to the middle surface plate, and the reaction-force section is not supported in the floating-mass state and is supported in the fixed state by the first actuator and the second actuator. In this way, a problem of the prior art (pre-load variation) is eliminated, and switching between the floating-mass state and the fixed state can be smoothly achieved.

A device for testing a brake system and at least one driving assistance system of a vehicle, which device has a platform on which the vehicle is placeable, where the platform is provided with a plurality of sets of rollers and where a respective wheel of the vehicle is positionable on each respective set of rollers. The plurality of sets of rollers are driveable by a respective drive with a measuring device which is configured to measure a force exerted on the roller for the purpose of performing the test of the brake system on the vehicle. The device includes, at the position of each pair of rollers, an aligning means configured to position the vehicle at a predetermined location on the rollers so that the at least one driving assistance system can be tested.

A device for testing a brake system and at least one driving assistance system of a vehicle, which device has a platform on which the vehicle is placeable, where the platform is provided with a plurality of sets of rollers and where a respective wheel of the vehicle is positionable on each respective set of rollers. The plurality of sets of rollers are driveable by a respective drive with a measuring device which is configured to measure a force exerted on the roller for the purpose of performing the test of the brake system on the vehicle. The device includes, at the position of each pair of rollers, an aligning means configured to position the vehicle at a predetermined location on the rollers so that the at least one driving assistance system can be tested.

A support apparatus for a modal test and a using method thereof. The support apparatus includes: a suspension structure (1) configured to suspend a test unit (2); and a support structure disposed under the suspension structure (1) and configured to support the test unit (2). The suspension structure (1) and the support structure are matched to cause a stiffness of the support apparatus for a modal test to be zero. The support structure includes an anti-stiffness rhombus-shaped frame (4), a scalable sleeve, a horizontal elastic component (49), and a base (6). The scalable sleeve is connected to the anti-stiffness rhombus-shaped frame (4) and the base (6) respectively, and the horizontal elastic component (49) connects two diagonal points of the anti-stiffness rhombus-shaped frame (4).