4results about How to "Good vibration suppression effect" patented technology

The application relates to a flexible mechanical arm control method and system based on a fuzzy PID, and the method comprises the following steps: constructing a flexible mechanical arm dynamics model according to mechanical arm related parameters, a hypothetical modal method and a Lagrange method; decoupling the flexible mechanical arm dynamics model to generate a slow variable subsystem model and a fast variable subsystem model; establishing an extended state observer according to the slow variable subsystem model and an impfal function and generating an observed disturbance value; generating an improved linear sliding mode surface according to a flexible mechanical arm position tracking error and a state power item; deriving the improved linear sliding mode surface to generate a sliding film control law; generating a trajectory tracking control law according to the observed disturbance value and the sliding film control law; generating a vibration suppression control law according to the fast variable subsystem model, a fuzzy PID control algorithm and a mechanical arm end vibration amount; and combining the trajectory tracking control law and the vibration suppression control law to generate a total control law. The method has better anti-disturbance performance and vibration suppression performance.

The application discloses a kind of active ocean riser vortex-induced vibration suppression device based on vibration reduction fin, to solve the problems such as the structure of existing vortex-induced vibration suppression device is complex, inconvenient to disassemble, not conducive to maintenance and high energy consumption, the application includes sleeve and multiple damping components, the sleeve is sleeved on riser and is detachably connected with riser, multiple damping components are evenly distributed along the circumferential direction and are installed on the outer periphery of sleeve, the sleeve includes two semicircular sleeves, and the two semicircular sleeves are clamped on the outer wall of the riser by a fixing member.The application has low energy consumption and low dependence on the riser device itself, without additional complexity of the system, through the design of two semicircular sleeves, the sleeve can be quickly installed and disassembled, and the application can be used immediately after installation, which is convenient to install and easy to maintain, and has wide applicability and high adaptability to vibration suppression problems of different engineering equipment.The application relates to the field of vortex-induced vibration suppression.

This invention discloses an active intelligent multi-directional gyro stabilizer and its intelligent control algorithm for improving the flutter stability of long-span bridges. The gyro stabilizer structure includes a motor, an attitude angle sensor, a power supply box, a control box, a gyro stabilizer body, and a chain drive device. The gyro stabilizer obtains the aerodynamic torque at a unit torsional angle of the main beam by identifying the flutter derivative through wind tunnel testing. When the main beam undergoes torsion, the system combines the aerodynamic torque at the corresponding torsional angle of the main beam with the instantaneous optimal mapping relationship between the torsional angle of the main beam and the spin angular velocity of the gyro stabilizer established based on artificial intelligence neural network technology. It then outputs the spin angular velocity of the gyro stabilizer at the corresponding torsional angle of the main beam, as well as the gyro precession angular velocity calculated according to gyro precession theory. The chain drive device then controls the gyro precession to generate gyro torque, intelligently controlling the motion state and attitude behavior of the stabilizer, thereby improving the flutter stability of the bridge cross-section.

The utility model relates to air conditioning equipment field discloses fixed structure of shock block and air conditioner thereof, including first shock block and second shock block, the surface of first shock block relative second shock block is first plane, the surface of second shock block relative first shock block is second surface, first plane and second surface all are set up with semicircle through slot and can butt joint and piece together into the cylindrical hole for air conditioner pipeline to pass through, be equipped with the guide portion on first plane, the guide portion includes at least two limit lugs, the second plane is set up with the limit slot of cooperation limit lug sliding insertion, limit slot and limit lug same number, still include at least two buckle parts of symmetrical setting in semicircle through slot both sides, the buckle part all includes the buckle of embedding first shock block and the card seat of embedding second shock block, the buckle is connected with opposite card seat, to provide a kind of shock block fixed structure of installation convenience not easy to fall off.