System and methods for characterizing a response of a structure-under-test to applied excitation forces using a test fixture. The fixture is selectively coupleable to the structure-under-test and is configured to hold the structure-under-test at a known position and in a known orientation relative to the fixture. A plurality of excitation devices and response sensors are coupled to the fixture. Excitation forces applied to the fixture by the excitation devices are conveyed by the fixture to the structure-under-test and each response sensor measures a dynamic response indicative of a response of the structure-under-test and the fixture to the applied excitation force. A controller receives response sensor data and applies a mathematical coordinate transformation to project the forces and moments corresponding to the applied excitation and the measured dynamic responses to a target point of the structure-under-test and to calculate a system response function based at least in part on the projection.

System and methods for characterizing a response of a structure-under-test to applied excitation forces using a test fixture. The fixture is selectively coupleable to the structure-under-test and is configured to hold the structure-under-test at a known position and in a known orientation relative to the fixture. A plurality of excitation devices and response sensors are coupled to the fixture. Excitation forces applied to the fixture by the excitation devices are conveyed by the fixture to the structure-under-test and each response sensor measures a dynamic response indicative of a response of the structure-under-test and the fixture to the applied excitation force. A controller receives response sensor data and applies a mathematical coordinate transformation to project the forces and moments corresponding to the applied excitation and the measured dynamic responses to a target point of the structure-under-test and to calculate a system response function based at least in part on the projection.

The disclosure provides a vehicle excitation advice. The vehicle excitation device that excites a vehicle having a plurality of wheels includes a plurality of excitation machine bodies on which the wheels are placed, respectively. The excitation machine body includes a front shaft and a rear shaft on which the wheels are placed at intervals in the in the front-rear direction of the vehicle, and an actuator (hydraulic actuator) that excites vibration to the wheels by moving at least one of the front shaft and the rear shaft in the front-rear direction. The front shaft is inclined such that the inner end portion of the front shaft in the left-right direction of the vehicle is located closer to the front of the vehicle than the outer end portion of the front shaft in the left-right direction of the vehicle.

The disclosure provides a vehicle excitation advice. The vehicle excitation device that excites a vehicle having a plurality of wheels includes a plurality of excitation machine bodies on which the wheels are placed, respectively. The excitation machine body includes a front shaft and a rear shaft on which the wheels are placed at intervals in the in the front-rear direction of the vehicle, and an actuator (hydraulic actuator) that excites vibration to the wheels by moving at least one of the front shaft and the rear shaft in the front-rear direction. The front shaft is inclined such that the inner end portion of the front shaft in the left-right direction of the vehicle is located closer to the front of the vehicle than the outer end portion of the front shaft in the left-right direction of the vehicle.

A liquefied natural gas (LNG) bunkering equipment test and evaluation system is provided. The system includes a storage tank module configured to store a liquefied natural gas, a supply module for connecting the storage tank module and the bunkering module, a bunkering module configured to perform bunkering by being supplied with the liquefied natural gas, a simulation module provided at a part under the bunkering module and the supply module and the simulation module is configured to simulate a maritime situation by giving a fluidity to the bunkering module and the supply module, and a controller configured to control a driving of the simulation module, thereby simulating various situations of sea areas by giving fluidity to the storage tank module and the bunkering module.

An actuator includes a cylinder sandwiched between a fixing plate fixed to the other end surface of a supporting plate together with a servomotor and a bearing housing, a ball screw shaft having one end protruding into the cylinder through through holes of the fixing plate, a slide block screwed with one end of the ball screw shaft in the cylinder, a cylindrical-shaped piston coupled to an end of the slide block and reciprocatably located in the cylinder, linear motion bearing units located inside the bearing housing to movably support the piston, and linear motion bearing units located in the cylinder to movably support the slide block.

An actuator includes a cylinder sandwiched between a fixing plate fixed to the other end surface of a supporting plate together with a servomotor and a bearing housing, a ball screw shaft having one end protruding into the cylinder through through holes of the fixing plate, a slide block screwed with one end of the ball screw shaft in the cylinder, a cylindrical-shaped piston coupled to an end of the slide block and reciprocatably located in the cylinder, linear motion bearing units located inside the bearing housing to movably support the piston, and linear motion bearing units located in the cylinder to movably support the slide block.

In accordance with at least selected embodiments, the present disclosure or invention is directed to novel or improved testing apparatus for testing lead acid batteries and/or their components, and/or the efficacy of their components, testing tables, testing systems, and/or related methods. In accordance with at least certain embodiments, the present disclosure or invention is directed to novel or improved methods for testing lead acid batteries and/or their components, and/or the efficacy of their components. In accordance with at least certain selected embodiments, the present disclosure or invention is directed to novel or improved systems for testing lead acid batteries and/or their components, and/or the efficacy of their components. In accordance with at least particular selected embodiments, the present disclosure or invention is directed to novel or improved apparatus and methods for testing a lead acid battery or batteries whereby the battery or batteries are subjected to motion typical of that experienced by the battery or batteries in use or in the field.

In accordance with at least selected embodiments, the present disclosure or invention is directed to novel or improved testing apparatus for testing lead acid batteries and/or their components, and/or the efficacy of their components, testing tables, testing systems, and/or related methods. In accordance with at least certain embodiments, the present disclosure or invention is directed to novel or improved methods for testing lead acid batteries and/or their components, and/or the efficacy of their components. In accordance with at least certain selected embodiments, the present disclosure or invention is directed to novel or improved systems for testing lead acid batteries and/or their components, and/or the efficacy of their components. In accordance with at least particular selected embodiments, the present disclosure or invention is directed to novel or improved apparatus and methods for testing a lead acid battery or batteries whereby the battery or batteries are subjected to motion typical of that experienced by the battery or batteries in use or in the field.

The three-dimensional standard vibrator based on the aerostatic gas-floating decoupling device contains a base. The base is installed with a X axis vibrator, a X axis return mechanism, a Y axis vibrator, a Y axis return mechanism, a Z axis vibrator, and a three-dimensional vibration platform. The X axis vibrator and the X axis return mechanism are both installed along X axis but separated by the three-dimensional vibration platform. The Y axis vibrator and the Y axis return mechanism are both installed along Y axis but also separated by the three-dimensional vibration platform. There are two aerostatic gas-floating plates corresponding to the vibrator and connecting to the X axis and Y axis vibrators, respectively. Two intervals used to generate gas films are formed between the two aerostatic gas-floating plates and the three-dimensional vibrator, respectively. The X axis and Y axis return mechanisms both consist of a reset spring and an aerostatic gas-floating plate corresponding to the spring. The Z axis vibrator is connected with the Z axis aerostatic gas-floating decoupling device. There are intervals used to form gas films between the Z axis aerostatic gas-floating decoupling device and the three-dimensional vibration platform. The present invention contains the advantages of high loading capacity, supporting stability and uniformity.