972 results about "Dynamic balance" patented technology

The invention provides a double-machine lifting dynamic balance control method based on real-time load feedback, which comprises the following steps of: after a system is initialized, synchronously acquiring load, height, attitude, position, motion and environment data of two machines, and fusing and filtering; load, height, angle, position and motion coordination multiple deviations are calculated, and balance and safety are evaluated; generating a speed, position, attitude and safety comprehensive control strategy by using multi-objective optimization according to an evaluation result, and setting a priority and a look-ahead mechanism; executing instructions in a distributed manner and monitoring the instructions in real time; self-adaptive parameter adjustment and machine learning continuous optimization are carried out based on a feedback closed loop; and multi-stage safety monitoring and emergency processing are synchronized. According to the invention, the precision, safety and efficiency of hoisting operation can be improved, the operation difficulty and energy consumption are reduced, and the adaptability and reliability of the system in a complex environment are enhanced.

The invention provides an open caisson sinking control method based on dynamic balance of a soil resistance field, which comprises the following steps of: judging whether an open caisson posture dynamic balance condition is met or not according to an open caisson bottom surface soil resistance vector field and an open caisson posture offset, if not, intervening space distribution of the open caisson bottom surface soil resistance vector field, and reconstructing the open caisson bottom surface soil resistance vector field; the dynamic balance condition of the open caisson posture is met; and based on the open caisson bottom surface soil resistance vector field, the height difference vectors of the adjacent bins on the open caisson bottom surface and the soil taking control matrix, a dynamic decision objective function is constructed, the objective function is solved, an optimal soil taking control matrix is obtained, and an actuator cluster is controlled to take soil from the bins on the open caisson bottom surface. According to the method, the influence of dynamic evolution of the soil resistance field of the bottom face of the open caisson on the open caisson attitude offset is considered, the soil resistance field is dynamically adjusted, the open caisson attitude is accurately controlled, and soil taking control is optimized.

The invention relates to the technical field of compressors, and discloses a scroll compressor shafting dynamic balance simulation method, device and equipment and a medium, and the method comprises the following steps: carrying out fluid mechanics analysis based on a movable scroll plate model to obtain initial three-way gas force; performing dynamic analysis based on a scroll compressor model by taking the initial three-way gas force as a boundary condition to obtain a displacement result of a movable scroll plate; inputting the displacement result into the movable scroll plate model, updating the position and the motion state of the movable scroll plate, and carrying out fluid mechanics analysis again to obtain a new three-way gas force; and performing dynamic balance optimization on the scroll compressor model by taking the new three-way gas force as a boundary condition until a preset condition is met, and obtaining a target dynamic balance result. According to the technical scheme, the precision of dynamic balance simulation of the shaft system of the scroll compressor can be improved, and therefore the product reliability is improved through optimization of dynamic balance.

The invention discloses a novel telescopic pipe structure of a high-temperature and high-pressure well and an optimal configuration method of a pipe column of the novel telescopic pipe structure, belongs to the technical field of oil and gas exploitation, and aims to solve the problem of buckling failure of the pipe column caused by piston force load of an existing telescopic pipe under high-temperature and high-pressure working conditions. The novel telescopic pipe is composed of an inner cylinder mechanism, an outer cylinder mechanism and a balance chamber mechanism. The inner cylinder mechanism and the outer cylinder mechanism are connected through threads, and structural integrity and reliable connection are guaranteed. The balance chamber mechanism comprises inner and outer pressure cavities and a hydraulic hole which are respectively communicated with the inner and outer pressure of the oil pipe to dynamically balance the piston force. The optimized configuration of the pipe column comprises the following three steps: S1, analyzing the mechanical behavior of the telescopic pipe column to provide a mechanical basis for configuration optimization; s2, the position of the telescopic pipe is designed, the well depth range where the telescopic pipe works is determined, and the optimal position is locked through iterative calculation; and S3, designing the number of the telescopic pipes, and determining the optimal number of the telescopic pipes meeting the compensation requirement. The stability of the high-temperature and high-pressure well pipe column can be remarkably improved, and technical support is provided for safe and efficient development of ultra-deep oil and gas wells.

The invention discloses an intelligent control method and system for dynamic balance of three floating bodies for crude oil transfer in deep and far sea. The method comprises the following steps: (1) data acquisition and state vector construction; (2) constructing a dynamic response prediction model: constructing a floating body historical motion database based on the initial motion data set, fusing hydrodynamic interference coefficient matrix calculation and multi-body motion mixed constraint analysis, and designing a space-time prediction algorithm based on a graph neural network and a recurrent nerve process to obtain a dynamic response prediction model; establishing a dynamic response prediction model under close-range coupling interference of the three floating bodies; (3) evaluating and correcting data confidence; (4) self-adaptive thrust control and early warning are carried out; and (5) visual monitoring and log management. The problems that in the prior art, positioning precision is low, response lags behind, the abnormal rate of sensor data is high, hydrodynamic coupling interference is not fully considered, and visual monitoring and intelligent early warning are lacked are solved, and the safety, stability and operation efficiency of the deep and far sea crude oil transfer process are effectively improved.

The utility model provides an active dynamic balancing device based on a tower crane. The active dynamic balancing device comprises a tower body, a working arm and a balancing arm, wherein the working arm and the balancing arm are fixedly mounted on two sides of the top of the tower body respectively; a water storage tank and a balance water tank are fixedly mounted on the balance arm, and the bottom of the water storage tank is communicated with the balance water tank through a connecting pipeline; and a control valve group for controlling water distribution between the water storage tank and the balance water tank is arranged on the connecting pipeline. According to the utility model, the balance weight of the balance arm is designed into the capacity-adjustable water tank, the working moment is balanced by utilizing the moment generated by the dead weight of the water body, the volume of the balanced water body is adjusted in real time according to requirements, so that the moment is changed, and the quantity of the water body distributed in the water storage tank and the balanced water tank is adjusted in real time according to the working moment. And the balance moment is synchronously equal to the working moment in real time.

The invention relates to the technical field of flywheel energy storage equipment, in particular to a flywheel rotor dynamic balance self-adaptive adjusting method and system based on magnetorheological fluid. The method comprises the steps that the sealing state of a magnetorheological fluid cavity is detected through a pressure sensor, and it is ensured that the pressure in the cavity is stable and free of leakage; the non-contact displacement sensor executes zero calibration, and output signal fluctuation is controlled within a preset range; carrying out no-load test on a current output port of the self-adaptive control module; when the rotating speed rises from a static state to a preset rotating speed value, a sensor of the real-time monitoring module synchronously collects a radial vibration signal of the rotor, decomposes a fundamental frequency vibration component with the same frequency as the rotating speed, and calculates the amplitude and the phase of the unbalance; when the rotating speed is stabilized in a preset rotating speed interval, the self-adaptive control module enters a closed-loop adjusting state, and when an unbalanced phase is calculated according to detection, a corresponding compensation quadrant fan-shaped cavity is locked, and the current of an electromagnetic coil is adjusted; the problem of traditional adjustment lag is solved, and over-compensation and under-compensation under variable working conditions are avoided.

The invention discloses a fracture pressure prediction and internal friction angle joint inversion method for a heterogeneous stratum. The invention belongs to the technical field of petroleum engineering and artificial intelligence cross application, well depth is used as an independent variable, the minimum / maximum horizontal stress, pore pressure and cohesion are combined to construct well depth mixed input, only multi-scale periodic basis function transformation is carried out on the well depth, and a linear well depth channel is reserved; establishing a rupture pressure depth mapping model, introducing an augmented Lagrange physical constraint containing dual variables and a dynamic threshold, adaptively adjusting a physical weight according to a physical residual error and a threshold difference value, realizing dynamic balance of a rupture criterion and data fitting, and searching and optimizing a model topology by using a multi-target network structure; under a limited sample, a fracture pressure profile and a physically reasonable internal friction angle can be obtained at the same time, and the prediction precision and the physical consistency are improved.

The invention relates to a robot dog dynamic balance and fall self-recovery method and device for a complex terrain, and the method comprises the steps: building a robust local elevation map through fusing multi-sensor data and quantifying the motion uncertainty of a robot; and a safe foot region set defined by the convex polygon is extracted through geometric feature analysis and plane segmentation. Then, collaborative planning of the trunk and the landing point is carried out in combination with a user instruction and the region set. In a control layer, a nonlinear model predictive control algorithm is adopted, a safety area is used as a hard constraint, and incomplete speed constraint is applied to a wheel type foot end, so that an optimized trunk track and a foot end force reference are output. The whole-body controller converts an upper-layer instruction into an accurate joint torque through a multi-task optimization framework with a weight. When instability is detected, the system can autonomously plan and execute a recovery action sequence including curling, controllable rolling and cooperative supporting.

The invention discloses adjustable machining grinding equipment, and relates to the technical field of machining. According to the equipment, a multi-dimensional adjusting mechanism is innovatively integrated, a sliding block is driven through a rotatable double-thread lead screw, stepless adjustment of the grinding radius is achieved, and the equipment is suitable for machining of the inner diameters of workpieces of different sizes; and in combination with a dynamic balance weight system, vibration in high-speed grinding is effectively inhibited, and the stability is improved. Meanwhile, a pneumatic-servo cooperative control system is adopted, stepless switching of the grinding pressure in the four stages of light pressure, medium pressure, heavy pressure and fine grinding is supported, the revolution-rotation speed ratio of the grinding disc to the workpiece is synchronously regulated and controlled, and the uniformity of the grinding track is optimized. In addition, the equipment is provided with a PLC program control module and a touch screen interface, 30 sets of technological parameters can be preset and stored, one-key calling is achieved, and the machining efficiency and consistency of complex parts are remarkably improved. According to the design, the adaptability of the equipment to sapphire substrates, gears and hard alloy special-shaped high-hardness workpieces is greatly expanded.

The invention relates to the technical field of intelligent robot control, in particular to a small robot dynamic balance control system based on DDPG, which comprises a sensor and a preprocessing module, provides accurate and reliable state data through denoising and standardization processing, and enhances the accuracy of subsequent processing; the ESO observer module estimates the system state and the total disturbance in real time, and the adaptive capacity and the anti-interference performance to the complex environment are improved; the information fusion and time sequence alignment module ensures information synchronization and accuracy through fusion processing and multi-dimensional state vector construction, meanwhile, the timeliness of a control decision is ensured, and the overall control effect is improved; the DDPG strategy network and the security layer module are combined with strategy optimization and multi-layer security constraints, continuous and safe control actions are output, and the stability and security of control are improved; and the actuator interface module realizes control instruction transmission, forms closed-loop feedback, adjusts a control strategy in real time, and improves the dynamic balance capability and the overall stability of the system.

The invention relates to a balance control algorithm for gravity center trajectory planning and real-time tracking of a humanoid robot, in particular to the technical field of robot control, and realizes dynamic balance control through a closed-loop process of state sensing, online gravity center trajectory re-planning, hierarchical control law calculation and joint torque output and execution. A layered dynamic modeling and control framework is constructed, a variable-height inverted pendulum model is combined with model prediction control, and a gravity center and zero moment point track feasible in dynamics is generated online; virtual restoring force is generated through a gravity center impedance controller, a task priority inverse dynamics solver is used, multi-task execution is coordinated on the premise that balance tasks are guaranteed to be absolutely preferential through a null-space projection technology, theoretical torque is converted into current instructions to drive joints to move, and through efficient collaboration and real-time updating of dynamic models of all levels, the balance tasks are optimized. According to the invention, deep collaboration of various technical features is realized, and the problems of poor adaptability, slow response and poor balance capability of a traditional method in a dynamic environment are effectively solved.

The invention provides a smart mining exploration robotic system capable of detecting and mapping subsurface minerals through a synchronized integration of mechanical, electromechanical, and computational subsystems. The system features a modular chassis frame, a reconfigurable traction assembly capable of switching between wheel and track modes, a dynamically balanced suspension system, a sensor stabilization assembly employing a gimbal mechanism, and a synchronizing drive assembly that distributes mechanical motion among the propulsion, damping, and sensing components. A processing unit receives real-time mechanical state information and sensor data to produce terrain-referenced mineral maps with high spatial and temporal precision.

The invention relates to a motor rotor dynamic balance test adjusting device, and relates to the technical field of motor rotors, the motor rotor dynamic balance test adjusting device comprises an operation table, and the upper surface of the operation table is provided with a dynamic balance test assembly, a moving assembly, a turn-milling assembly and a clamping assembly. By designing the moving assembly, the turn-milling assembly and the clamping assembly and adopting a separated layout, the operation space is expanded, metal scraps can be prevented from splashing and accumulating in a narrow space in the turn-milling process to influence equipment operation, the detection precision is improved, brush rollers on the two sides of a linkage cutting opening rotate in the turn-milling process, and the detection precision is improved. According to the technical scheme, scraps are continuously prevented from splashing, the side face of the rotor is cleaned, meanwhile, the rotor can be rotated according to the position of an unbalance point, the turning and milling pressing assembly is matched to achieve turning and milling of any part of the outer side face of the rotor, the coverage area of the turning and milling unbalance point is greatly enlarged, the recheck qualification rate is increased, the recheck frequency is reduced, and then the dynamic balance testing efficiency is improved.

The application discloses a floating wind power roll damping system based on fan-geared coupling and a control method. The system comprises a fan rotor, a tower, a floating platform, a cabin and a double geared roll damping device. A sensor system is arranged on the top of the tower and the floating platform and is used for monitoring multi-degree-of-freedom motion data of the system. The data collected by the sensor is transmitted to a controller through a signal transmission device, so as to realize real-time monitoring and control of the rolling state of the system. The active precession control mechanism controls the rotation of the precession shaft according to the received servo motor driving torque control signal output by the controller, so as to realize the control of the precession motion of the geared rotor. The application further establishes a complete fan-geared coupling dynamic model and designs a control method based on multi-objective optimization. The PSO algorithm is used to simultaneously optimize the roll damping performance and the energy consumption index, and a complete Pareto optimal solution set is established. The method can realize the dynamic balance of the performance and the energy consumption.

The invention discloses a rotary machine dynamic balance optimization method based on an attitude performance correlation model, and relates to the technical field of rotary machine dynamic balance optimization. Comprising the following steps: S1, synchronously collecting rotor vibration signals and temperature field data through temperature and vibration sensors, carrying out real-time calibration on structure parameters, substituting a temperature compensation algorithm to calculate interference components, and outputting pure vibration deviation data subjected to temperature compensation; the structural parameters comprise a rotor thermal expansion coefficient, a bearing radial clearance temperature attenuation coefficient and inherent or dynamic characteristic parameters related to material properties, geometric dimensions and connection states of the rotary machinery. The method has the advantages that through deep combination of vibration and temperature, a temperature-frequency spectrum-amplitude three-dimensional coupling traceability matrix is constructed; multi-feature matching is achieved through a fusion algorithm, temperature-dominated vibration sources and mechanical-dominated vibration sources can be clearly distinguished, and the accuracy of the dynamic balance optimization direction is guaranteed.

The utility model belongs to the technical field of agricultural machinery assembly, and particularly relates to a roller welding and positioning device which comprises a base, a shaft positioning and clamping assembly, an amplitude disc positioning mechanism, a roller positioning mechanism and a baffle positioning and clamping mechanism are arranged on the base, and the shaft positioning and clamping assembly comprises a rotary clamping mechanism and a rotary jacking mechanism. The rotary clamping mechanism and the rotary jacking mechanism are oppositely arranged, the rotary clamping mechanism comprises a rotary clamping support, a rotary disc and an index plate are rotationally arranged on the rotary clamping support, the rotary disc and the index plate synchronously rotate, a shaft clamping mechanism is arranged on the index plate, and the shaft clamping mechanism is arranged on the rotary clamping support. The shaft clamping mechanism is used for clamping one end of an intermediate shaft, a first positioning hole is formed in the index plate, a plurality of second positioning holes are evenly formed in the index plate in the axial direction, and a first positioning pin and a second positioning pin are arranged on the rotary clamping support. According to the utility model, the dynamic balance performance of the roller is improved, and the occurrence probability of unbalanced faults of the roller in operation is reduced.

The invention relates to the field of aircrafts, and discloses a sandwich-structured composite material mute paddle, which comprises a paddle blade, and the paddle blade is a sandwich carbon fiber laminated structure composed of an upper layer prepreg laying layer unit, a foam sandwich layer and a lower layer prepreg laying layer unit; the upper-layer prepreg laying unit and the lower-layer prepreg laying unit are each of a bionic spiral structure formed by stacking multiple layers of composite material prepreg sheets in a bionic spiral laying sequence. The invention further discloses the preparation method of the composite material mute paddle of the sandwich structure. Load can be effectively transmitted and dispersed along fiber paths in different directions in the outer-layer prepreg bionic spiral structure, so that the comprehensive rigidity, the torsional property and the damage tolerance of the paddle are improved, the material characteristics are optimized, a three-section type pressurization method is adopted, a stable external pressure environment is established in the early stage of paddle foaming, and the mechanical performance of the paddle is improved. And dynamic balance and collaborative forming of internal and external pressure in the paddle forming process are achieved.

The invention relates to the technical field of washing machine inner barrel testing, and discloses a washing machine inner barrel dynamic balance rapid testing tool which comprises a base and a roller. One end of a hydraulic cylinder is fixedly connected with a first rack, one side of the first rack is in meshed connection with a connecting gear, and one side of the connecting gear is fixedly connected with a threaded rod; the outer portion of the threaded rod is in threaded connection with a connecting base, the inner side of the connecting base is fixedly connected with a detection ring, the inner side of the detection ring is fixedly connected with two pressure sensing detection assemblies, a second motor is started, a first gear drives a second gear to rotate, the second gear drives a roller to rotate through a rotating shaft, a prism block and a connecting shaft, and then a hydraulic cylinder is started; the hydraulic cylinder drives the first rack to move back and forth, the first rack moves to drive the connecting gear and the threaded rod to rotate, the threaded rod drives the connecting seat to move, and the detection ring drives the pressure sensing detection assembly to move, so that the dynamic balance of the roller can be rapidly tested.

The invention discloses a low-noise motor rotor dynamic balance detection device, and particularly relates to the technical field of automobile part detection, the low-noise motor rotor dynamic balance detection device comprises a detection table and supporting plates arranged at the upper end of the detection table in a bilateral symmetry manner, and the inner surfaces of the two supporting plates are jointly provided with rotor fixing structures distributed in a bilateral symmetry manner; driving structures used for driving a motor rotor to rotate are arranged at the upper end of the detection table in a bilateral symmetry mode, and an eccentricity detection structure used for detecting the rotation eccentricity and the vibration frequency of the rotor is arranged in the middle of the upper end of the detection table. Rotor noise is effectively isolated through the shielding cover to ensure detection accuracy, automatic centering and stable clamping of the rotor are achieved through cooperation of the clamping assembly and the driving assembly of the rotor fixing structure, and accurate positioning and low-friction driving of the rotor are completed through cooperation of the positioning assembly and the locking assembly of the driving structure. Vibration and eccentricity data are acquired in a multi-dimensional manner by combining a contact wheel of an eccentricity detection structure and a sensor array, and high-precision comprehensive detection of dynamic balance of the rotor is finally realized.

The utility model provides an active dynamic balance tower crane which comprises a tower body, a working arm and a balance arm, wherein the working arm and the balance arm are respectively arranged on two sides of the tower body; wherein a hoisting / walking trolley is arranged on the working arm, and a dynamic counterweight mechanism is arranged on the balance arm. Compared with a traditional static counterweight mode, the active dynamic balance tower crane has the advantages that the dynamic counterweight mechanism can avoid bending deformation of the tower body caused by unbalanced torque of the working arm and the balance arm in a non-working state; in the working state, the front-back shaking amplitude of the tower crane can be reduced, the safety performance of the tower crane is improved, the working environment of a tower crane driver is improved, and the fear of the driver is reduced. In addition, compared with a balancing weight in passive arc motion, the mechanism can actively adjust the balance moment to be equal to the working moment in real time according to the change of the working moment on the working arm, and as the working moment is actively balanced, the overturning moment to a foundation is minimum, the safety performance of the tower crane is improved, and the accident occurrence probability is reduced.

The invention discloses a dynamic balance adjusting device and method for a magnetic suspension fan rotor, and relates to the technical field of self-adaptive adjustment. The method comprises the steps of collecting a suspension bearing displacement signal, a magnetic suspension coil current signal, a machine body vibration acceleration signal, a motor end electromagnetic response signal and a rotor angular displacement parameter, and constructing a rotor operation signal set; performing preprocessing and feature extraction on each signal to obtain four types of feature data; inputting the comprehensive characteristic data into a rotor balance diagnosis model to identify the unbalance state of the rotor; based on an amplitude phase inversion algorithm, solving a virtual counterweight amplitude and a phase adjustment amount, and injecting into a suspension coil to execute adjustment; judging whether dynamic correction is needed or not according to the real-time comprehensive characteristic data, and if yes, generating a dynamic gain coefficient to correct the adjustment parameters and then injecting the adjustment parameters into the suspension coil again; according to the invention, real-time identification and self-adaptive adjustment are carried out on the mass unbalance vibration of the magnetic suspension fan rotor, the operation vibration of the rotor is effectively inhibited, and the balance stability and reliability of the system are improved.

The invention provides a reinforcement learning-based motion control strategy network training method and device for a foot robot with a floating substrate, and relates to the technical field of robots. The method comprises the steps that the positions of all joints and the positions of all soles of the foot robot before and after a target action is executed are obtained; calculating the position variation of each joint according to the position change of each sole before and after the execution of the target action; calculating a reference value of the position of each joint after the target action is executed according to the position of each joint and the position variation of each joint before the target action is executed; and according to the reference value and the position of each joint after the target action is executed, constructing a reward item, and training a base attitude control model by using the reward item. According to the base posture control method, the base posture control model after training can enable the foot type robot to generate coordinated joint actions more conforming to kinematics constraints when the base posture is adjusted, and then the terrain adaptability, the dynamic balance performance and the execution reliability of high maneuvering actions of the foot type robot are improved.

The invention belongs to the technical field of centrifugal processes, and particularly discloses a centrifugal process in composite forming of a large tubular pile, which comprises the following five centrifugal stages: a low-speed centrifugal stage, a medium-low-speed centrifugal stage, a medium-speed centrifugal stage, a high-speed centrifugal stage and a shutdown centrifugal stage, an S-shaped acceleration curve is generated through cubic spline interpolation between every two adjacent centrifugal stages for speed adjustment, and the centrifugal speed adjustment is changed from instant switching to 8-12 s gradual transition acceleration from the middle-low speed centrifugal stage to the middle speed centrifugal stage; and the large-particle-size aggregate and the fine-particle aggregate are kept relatively synchronous when the radial position is adjusted through gradual transition acceleration. A five-stage progressive rotating speed control strategy is adopted, an S-shaped acceleration smoothing algorithm is introduced into a transition area of each stage, the acceleration change rate is controlled to restrain sudden change of a centrifugal force field, and uniform particle size distribution of concrete materials in the centrifugal forming process is achieved in cooperation with a high-precision rotating speed feedback system and a dynamic balance compensation mechanism.

The invention discloses an unbalanced point position angle detection device for a spindle of a magnetic suspension molecular pump, and mainly relates to the technical field of dynamic balance detection. Comprising a laser sensor, a plurality of first grooves are formed in one side of a shaft peak, fixed magnets are arranged in the first grooves, movable magnets attracted with the fixed magnets are further included, a movable seat and a sliding plate are symmetrically arranged on the two sides of a base in a sliding mode, and a first arc face making contact with the side face of a main shaft is arranged on the movable seat. The sliding plate is provided with a first vibration sensor making contact with the movable base, the first vibration sensor is electrically connected with the laser sensor, and the device further comprises a driving motor driving the main shaft to rotate on the movable base. The beneficial effects of the invention are that the laser sensor is matched with the vibration sensor to measure the relative angle of the unbalanced point, the problem that the searching of the dynamic balance point of the main shaft is not visual enough is solved, the frequency of searching and adjusting the unbalanced point is reduced, and the efficiency of detecting the dynamic balance of the main shaft of the magnetic suspension molecular pump is improved.

The invention relates to the technical field of mechanical fatigue testing, in particular to rotary bending fatigue testing equipment for a rotor shaft, which comprises a base, a rotary driving module, a loading module, a dynamic balance module, a crack monitoring module and an adjusting module, and is characterized in that the rotary driving module drives the rotor shaft to rotate through a belt transmission assembly; the loading module adopts a lever type force reversing mechanism to realize accurate bending moment loading; the dynamic balance module automatically counteracts eccentric vibration through a free disc and a symmetrical bearing seat; the crack monitoring module captures vibration abnormity and internal crack initiation in real time; and the adjusting module is automatically adapted to different shaft lengths by driving a threaded screw rod through a motor. Anti-slip lines are arranged on the inner sides of the clamps at the two ends to ensure stable clamping; the levers are symmetrically arranged and matched with the locking nuts, so that switching of translation force or bending force applied by the levers is facilitated, the equipment realizes high-precision and full-period fatigue test, and the device is suitable for reliability evaluation of key rotor parts of aero-engines and steam turbines.

The invention discloses a hilly land pile foundation rotary drilling hole forming device and a construction method, and relates to the field of pile foundation construction equipment. The device comprises a drilling main body, a drilling mechanism, a vibration mechanism, a driving telescopic mechanism, a geological self-adaptive system and a dynamic balance control module. The drilling mechanism comprises a roller bit, a vibration mechanism assists in crushing, and a telescopic mechanism is driven to drive an outer wall scraper to stretch out and draw back in the radial direction. The geological self-adaptive system detects rock stratum data in real time through the geological detection module, and the main control module adjusts vibration parameters and scraper pressure; the dynamic balance control module monitors the skewness degree through a tilt angle sensor, and adjusts the expansion and contraction amount of a scraper in a linkage mode to compensate the perpendicularity deviation. The construction method comprises the steps of construction preparation, self-adaptive hole forming, hole wall finishing and construction ending. The device can adapt to complex geology of hills, improves the hole forming efficiency and quality, and has good practicability.

The invention discloses a power turbine rotor structure design method, which belongs to the technical field of aero-engines, and comprises the following steps: arranging an oil film damper according to strain energy distribution and vibration mode; performing structure optimization on the power turbine rotor according to the radial deformation condition of the connection interface; designing the sectional wall thickness of the power turbine shaft; a balance boss is arranged on the outer wall of the maximum displacement position in each order of vibration mode power turbine shaft; and the gap between the central pull rod of the power turbine rotor and the power turbine disc is designed according to the maximum vibration displacement of the power turbine disc. According to the invention, the oil film dampers are arranged at reasonable positions, so that the rotor has good vibration reduction; connection interface deformation coordination calculation is carried out, a connection structure is optimized, and the connection interface is not damaged under long-term work; and designing and optimizing the segmented shaft wall thickness, optimizing and designing the critical rotating speed margin, considering the influence of the limit unbalance on the gap, and realizing a good dynamic balance characteristic.

The invention discloses a shield tunneling machine soil pressure balance control method and system based on multi-parameter dynamic optimization, and relates to the technical field of shield tunneling machine control. The method comprises the following steps: calculating a support force required in a shield tunneling process under a current working condition and a theoretical shield soil bin pressure observation value, and establishing a relationship through a linear fitting mode to obtain a soil bin pressure transfer coefficient under a current stratum condition; calculating the theoretical support force of the tunnel face in the tunneling process, and calculating the preset value of the shield soil bin pressure in combination with the soil bin pressure transfer coefficient; and acquiring a real-time shield soil bin pressure observation value, and performing multi-parameter collaborative optimization on an error between the preset value of the shield soil bin pressure and the real-time shield soil bin pressure observation value by using a particle swarm optimization algorithm to obtain an optimized control parameter. According to the method, the pressure of the soil bin can be adjusted more accurately according to actual conditions, so that dynamic balance of an excavation face in the construction process is ensured, and safety and stability of underground tunnel construction are guaranteed.

A dynamic balance test device for a fan rotor belongs to the technical field of fan rotor test equipment and comprises a test bench, an adapter block is fixedly mounted on a bench surface of the test bench, a hydraulic telescopic column is rotatably mounted in the adapter block, and an arc-shaped frame with openings at the bottoms of two ends is rotatably mounted on the bench surface of the test bench. The end, away from the adapter block, of the hydraulic telescopic column is rotationally connected with the rear side of the arc-shaped frame, a driving belt is rotationally installed in the arc-shaped frame, a driving mechanism used for driving the driving belt to rotate is installed in the arc-shaped frame, two sliding grooves are symmetrically formed in the upper surface of the test bed, and two L-shaped carrying blocks are slidably installed in the sliding grooves. According to the fan rotor driving device, the driving belt and the fan rotor can be pressed in a contact mode through the hydraulic telescopic columns, and then the driving operation on the fan rotor can be completed through the driving mechanism and the driving belt. According to the device, the operation convenience is remarkably improved.