8results about How to "Good vibration suppression effect" patented technology

In order to solve the problems that an existing vortex-induced vibration suppression device is complex in structure, inconvenient to disassemble and assemble, not convenient to maintain, large in energy consumption and the like, the active marine riser vortex-induced vibration suppression device comprises a pipe sleeve and a plurality of vibration reduction assemblies, the pipe sleeve is arranged on a riser in a sleeving mode and detachably connected with the riser, and the vibration reduction fins are arranged on the pipe sleeve. The multiple damping assemblies are evenly distributed on the periphery of the pipe sleeve in the circumferential direction, the pipe sleeve comprises two semicircular pipe sleeves, and the two semicircular pipe sleeves are clamped on the outer wall of the vertical pipe through fixing pieces. According to the invention, the energy consumption is relatively low, the dependence degree on the vertical pipe device is relatively small, the complexity of the system is not additionally increased, through the design of the two semicircular pipe sleeves, the pipe sleeves can be quickly mounted and dismounted, and the pipe sleeves can be used while being mounted, are convenient to mount and easy to maintain, also have relatively wide applicability, and are suitable for popularization and application. And the vibration suppression device has high adaptability to the vibration suppression problem of different engineering equipment. The invention relates to the technical field of vortex-induced vibration suppression.

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 invention relates to the technical field of noise control, in particular to a cable-supported sound insulation barrier. The sound insulation screen comprises side sound insulation screens arranged on the two sides of a road and a bridge and further comprises a top sound insulation screen arranged above the road and the bridge, the top sound insulation screen comprises a bearing cable net, a main frame, side frames and sound insulation plates, the main frame comprises main stand columns and main beams, and the main stand columns are arranged in the middle of the road and the bridge at intervals in the longitudinal direction of the road and the bridge; the girders are fixedly arranged at the upper parts of the main upright posts along the longitudinal direction of the road bridge; the side frame comprises side stand columns and side beams, the side stand columns are fixedly arranged on the edges of a road bridge at intervals in the longitudinal direction of the road bridge, and the side beams are fixedly arranged on the tops of the side stand columns in the longitudinal direction of the road bridge. The bearing cable net comprises a plurality of main inhaul cables, the main inhaul cables roughly extend in the transverse direction of the road bridge, the two ends of each main inhaul cable are fixed to the corresponding main beam and the corresponding edge beam respectively, the main inhaul cables are arranged at intervals in the longitudinal direction of the road bridge, and the sound insulation plates are arranged on the bearing cable net. The method can be widely applied to noise control projects in the traffic and transportation fields such as highways, railways, subways and high-speed rails.

The invention provides an input saturation flexible double-connecting-rod mechanical arm reinforcement learning control method and device, and relates to the technical field of robot intelligent control. The method comprises the steps that a hypothetical modal method is used for constructing a dynamic model of the flexible double-connecting-rod mechanical arm system; designing a reinforcement learning adaptive vibration controller with input saturation; and according to the reinforcement learning self-adaptive vibration controller with the input saturation, the flexible double-connecting-rod mechanical arm system is controlled, and an optimal control strategy is obtained. The invention provides a reinforcement learning algorithm with an auxiliary system for a flexible double-connecting-rod mechanical arm, and the auxiliary system is used for eliminating the influence of a saturated nonlinear function on the trajectory tracking of the mechanical arm. In addition, a reinforcement learning algorithm is designed to approach uncertain information of a flexible double-connecting-rod mechanical arm system, so that the flexible mechanical arm restrains elastic vibration while achieving trajectory tracking.

The present invention relates to the technical field of building vibration reduction structures, and in particular to an anti-settlement vibration isolation system and a vibration reduction method, a building, and a vibration isolation effect detection method. The anti-settlement vibration isolation system of the present invention includes a multi-stage vibration isolation foundation structure arranged between a base layer and one or more target foundation layers. The multi-stage vibration isolation foundation structure includes a vibration reduction foundation layer arranged between the bottom base layer and each target foundation layer, and a first bottom cushion layer respectively arranged between each target foundation layer and the vibration reduction foundation layer. The vibration isolation system can achieve a sufficiently good vibration suppression effect that cannot be achieved by the existing single-stage vibration isolation structure, and utilizes the multi-stage vibration isolation foundation structure to produce an effective effect of resisting uneven settlement. The vibration isolation system can effectively reduce the vibration impact on the building caused by the operation of rail transit, and can also improve the building's ability to resist uneven settlement.

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.