Abstract: An active compensation algorithm for an inertia force of on-board equipment and a damping device are provided. The algorithm includes the following steps: a compensation angle acquisition step: acquiring an expected real-time inertia force compensation angle of a damped target when a vehicle takes a sudden turn or emergency braking based on velocity information, acceleration information, and angular velocity information of a vehicle chassis; and a control step: adjusting an angle of a damping motor by adopting a control algorithm according to the real-time inertia force compensation angle, where the damping motor keeps pace with the expected inertia force compensation angle in real time. The active compensation algorithm for the inertia force of on-board equipment can calculate the inertia force compensation angle of the vehicle in real time, so as to achieve a better inertia force compensation function to the damped target through the damping motor.

Abstract: A staged cementing device includes a cylindrical body having an inner chamber. A circulating opening and a liquid inlet recess open to the inner chamber are arranged on a wall of the body. An opening assembly is arranged in the body, which has an opening sleeve and an opening seat located in the opening sleeve. Initially the opening sleeve is connected with the body through a first shear pin and covers the circulating opening, and the opening seat is connected with the opening sleeve through a second shear pin and covers the liquid inlet recess. A packer includes a packing valve body and a packer rubber. The packing valve body includes a flow channel in communication with the liquid inlet recess, and the packer rubber includes a liquid reservoir in communication with the flow channel. The second shear pin is sheared off in response to primary cementing procedure.

Abstract: A self-balancing vibration damping system, an active vibration damping seat, and transport equipment are provided. The self-balancing vibration damping system includes an active vibration damping module, a control module, a sensor module, and a receiving module, where the sensor module is configured to acquire motion data of the transport equipment; the active vibration damping module includes a first rotating assembly and a second rotating assembly; the first rotating assembly is provided in an accommodation space; the second rotating assembly is provided at a driving end of the first rotating assembly, and is butted with the receiving module; the control module is configured to control the first rotating assembly and the second rotating assembly to operate synchronously according to the motion data, so as to provide a force opposite to a tilt direction of the receiving module.

Abstract: A staged cementing device includes a cylindrical body having an inner chamber. A circulating opening and a liquid inlet recess open to the inner chamber are arranged on a wall of the body. An opening assembly is arranged in the body, which has an opening sleeve and an opening seat located in the opening sleeve. Initially the opening sleeve is connected with the body through a first shear pin and covers the circulating opening, and the opening seat is connected with the opening sleeve through a second shear pin and covers the liquid inlet recess. A packer includes a packing valve body and a packer rubber. The packing valve body includes a flow channel in communication with the liquid inlet recess, and the packer rubber includes a liquid reservoir in communication with the flow channel. The second shear pin is sheared off in response to primary cementing procedure.

Abstract: The present invention discloses a train coupler structural health monitoring system. The system includes one or more sensors mounted to or integrated with the train coupler, a data acquisition unit for receiving signal or data from the sensors, and a processing unit for determining the train coupler's structural health based on the received signal or data. Inspections via the system can be performed in real time continuously or periodically while a train is in service. It can also be performed offline while a train is not in service. Inspection method can be either passive, where sensors collect signals without generating excitation signals to the structure, or active, where some sensors are used as actuators to actively send excitation signals to the structure and other sensors or the actuators themselves collect the structural response signals. The data acquisition unit receives signals or data from sensors.