824 results about "Inertia force" patented technology

A work apparatus includes: a housing; a motor support unit designed separately from the housing, the housing being fixed to the motor support unit. A drive motor is designed as an electric motor for driving a tool and is attached to the motor support unit. A receptacle housing designed separately from the motor support unit for receiving at least one battery pack for supplying the drive motor with electrical power is fixed to the housing. The receptacle housing and the motor support unit are designed and arranged relative to each other in such a way that the receptacle housing is able to move relative to the motor support unit in order to reduce, in particular to prevent, direct transmission of inertial forces emanating from the receptacle housing to the motor support unit in the event of an impact load on the work apparatus.

The invention provides a strong nonlinear simulation method and device suitable for a large floating fan, and the method comprises the steps: dividing a target floating fan into a plurality of body structures according to the model parameters of the target floating fan, so as to construct a multi-body model containing a plurality of degrees of freedom, and building a whole machine load and a motion transmission path; the aerodynamic load input of each body structure is calculated, and the nonlinear dynamic response of the blade is calculated according to the aerodynamic load input of each body structure; according to the coordinate transformation relation, the nonlinear dynamic response of the blade is converted into a whole coordinate system and input into a multi-body dynamic model of the whole machine, generalized active force and generalized inertia force of each body structure in the target floating type draught fan are obtained through calculation, and the motion response of each body structure of the target floating type draught fan is obtained through simultaneous solution. According to the scheme, the motion response of each body structure of the target floating fan can be accurately determined, so that the running state of the floating fan in the deep and far sea complex environment can be accurately evaluated.

The invention belongs to the technical field of underground structure tests, and provides a deep underground structure pseudo-dynamic test method and device.The method comprises the steps that a numerical substructure and a test substructure are constructed, and an interaction boundary is arranged between the numerical substructure and the test substructure; and compensating the boundary prediction data according to the inertia force compensation coefficient based on the numerical sub-structure in each loading process, and loading the compensated prediction data to the test sub-structure, so that the test sub-structure outputs prediction response data and updates the rigidity of the numerical sub-structure, and determining a target balance force according to the prediction response data based on the numerical simulation substructure, driving a next loading process by using the target balance force, and obtaining a dynamic response rule of the soil-structure system when respective boundaries of the numerical simulation substructure and the test substructure meet displacement coordination and force balance. According to the method, the initial stress state of the deep underground structure can be accurately simulated, and the accuracy of obtaining the mechanical response rule of the underground structure is improved.

The application discloses a control method and device of a grass collecting device and electronic equipment. The control method of the grass collecting device comprises the following steps: obtaining a grass unloading instruction; controlling the grass collecting box to move from a first position to a second position in a first direction according to the grass unloading instruction, wherein the first position is a position where the grass collecting box is in a closed state, and the second position is a position where the grass collecting box reaches a maximum opening angle; and controlling the grass collecting box to swing according to swing parameters, wherein the swing parameters comprise a swing angle, and the swing angle is smaller than the maximum opening angle. By using the control method of the grass collecting device, most of the grass clippings can be unloaded after the grass collecting box is lifted, and different direction inertial forces can be generated in the swinging process of the grass collecting box, so that a small amount of residual grass clippings can be removed through vibration, the situation that the grass is not completely unloaded is avoided, the grass unloading efficiency and effect are improved, and manual unloading operation is saved.

The present disclosure obtains a vehicle occupant restraint device capable of continuously restraining the shoulder of an occupant with a shoulder seatbelt as a reaction force member by supporting an airbag with a seatbelt regardless of the physique difference of the occupant during a frontal collision of a vehicle. The vehicle occupant restraint device includes: a seatbelt that restrains an occupant seated on a vehicle seat to the vehicle seat; and a seat belt support airbag which is inflated and deployed at least between a shoulder belt of the seat belt and a shoulder of the occupant by being supplied with gas from an inflator during a frontal collision of the vehicle, the shoulder belt moves toward the front side of the vehicle by following an occupant moving toward the front side of the vehicle due to inertia force, moves along the shoulder belt, and is maintained in a state of being interposed between at least the shoulder of the occupant and the shoulder belt.

The invention relates to the technical field of hydraulic system control, and discloses a fault diagnosis method and device for a hydraulic system of fully-mechanized mining withdrawing triangular area supporting equipment. The method comprises the following steps: acquiring real-time operation data of each oil cylinder through a hydraulic system sensor, extracting differences of motion states of the oil cylinders by adopting a time sequence analysis and principal component analysis method, and calculating quantitative indexes of inertia force distribution and non-uniform force distribution of the oil cylinders. And when the quantitative index exceeds a preset threshold value, identifying the abnormal oil cylinder by adopting a clustering analysis method, analyzing the correlation between the positioning deviation and the abrasion of the sealing element through a linear regression model, and calculating the occurrence probability of an early fault signal. The fault prediction grading result is generated based on the probability distribution, the oil cylinder control parameters are adjusted through the decision tree algorithm, the oil cylinder operation parameters are updated, dynamic adjustment of the hydraulic system and optimization of the supporting structure are achieved, the fault diagnosis precision of the hydraulic system is improved, and the stability and reliability of the supporting structure are ensured through real-time compensation control.

The invention discloses an intelligent layering and guiding device for highway tunnel fire smoke and a control method, and relates to the technical field of tunnel fire safety, a smoke flow Froude number is introduced as a direct control target, the parameter represents the ratio of smoke flow inertia force to buoyancy force, the numerical value directly determines the stability of a layering interface, and the layering interface can be directly controlled. The Froude number of each subarea of the tunnel is calculated in real time through a sensing network and is compared with a critical value calibrated through an experiment, when a real-time value is lower than the critical value, it is indicated that inertia force is relatively insufficient, the buoyancy effect is dominant, and instability and entrainment are likely to happen to an interface between a smoke layer and lower cold air, and then according to a control algorithm, the smoke layer and the lower cold air are controlled. The micro jet fan applies directional inertia force to a smoke layer by adjusting the angle and the speed, the intelligent induction smoke outlet optimizes local pressure difference and flow by adjusting the opening degree and assists in maintaining flowing, the smoke flowing state is actively locked in a stable layered flow interval, and mixing and sedimentation caused by flow state instability are prevented.

The invention discloses a five-axis machining cutter location linear interpolation optimization control method, which relates to the technical field of numerical control machining, and comprises the following steps: fitting a machining contour to generate a curve expression, determining an operation point sequence based on curvature distribution, and converting the operation point sequence into an actuator pose sequence; based on the model of a five-axis machining machine tool, a total transformation matrix from a base coordinate system to an actuator coordinate system is established through a D-H method, motion parameter changes caused by five-axis elastic deformation and inertia force are established based on the nonlinear beam theory and the Alembert principle, and a nonlinear axis body coupling motion equation is established; a correction expression is generated in combination with the Jacobian matrix, optimal unknown parameters in the correction expression are determined by introducing a quantum fluctuation simulated annealing algorithm, and a correction Jacobian matrix is generated; according to the actuator pose change of the adjacent operation points in the actuator pose sequence, the corrected Jacobian matrix is combined, the inverse kinematics algorithm is adopted to derive the motion parameter vector of the previous operation point, and higher-precision machining control is achieved.

The invention provides an electric power steering active return control method and system, and belongs to the field of electric power steering systems.The electric power steering active return control method comprises the steps that in the rotating process of a vehicle steering wheel, zone control is conducted with the steering wheel rotating angle as the benchmark, and original request torque is obtained; estimating the inertia moment of the steering wheel in the steering wheel aligning process; and calculating the original request torque and the steering wheel inertia torque to obtain a corrected steering wheel torque, and correcting the steering wheel torque according to the corrected steering wheel torque. According to the technical scheme, the aligning torque error caused by rotating speed fluctuation of the steering wheel is eliminated, and particularly under the working condition that a driver is completely released from the hand, the stability of aligning control is remarkably improved.

The invention discloses a vibration excitation device, a vibration excitation system and a use method of the vibration excitation device, and relates to the field of engineering structure detection, and the vibration excitation device comprises a supporting frame which is used for being placed on a vibration-excited object; the supporting hinge is arranged on the supporting frame; one side of the lever is rotationally connected with the supporting hinge; the mass block is connected with the other side of the lever and is arranged on the support frame; the actuator is arranged on the supporting frame, and the output end of the actuator is connected with the lever; and the elastic piece is arranged on one side, hinged with the support, of the lever and is connected with the support frame and the lever. According to the vibration excitation device, the elastic force provided by the elastic piece fixedly installed on the supporting hinge side during resonance counteracts the inertia force, the actuator only needs to overcome the damping force, the reverse elastic force provided by the elastic piece can reduce friction damping, and the actuator power of the vibration excitation device is further reduced.

The invention discloses a combined sucker rod centralizer, and relates to the technical field of sucker rod centralizers, the combined sucker rod centralizer comprises an upper fixing sleeve and a centralizing assembly, the upper fixing sleeve is connected to the outer side of a sucker rod body in a penetrating and sleeving manner, the lower side of the upper fixing sleeve is connected with an upper adjusting mechanism capable of moving up and down, and the upper adjusting mechanism is connected with the upper side of the centralizing assembly. According to the combined sucker rod centralizer, the rotation effect of the centralizing assembly is automatically achieved through the inertia force of up-down movement of a sucker rod and rolling fit of the slope blocks and the balls, so that the contact points of the steel balls and the inner wall of an oil pipe are continuously and dynamically changed, and the situation that local concentrated abrasion is caused due to the fact that the contact points of a traditional centralizer are fixed is avoided; and through high-low position automatic matching of the first inclined plane block and the second inclined plane block, bidirectional stable supporting of the upper guide rod, the lower guide rod and the centralizing assembly can be achieved, the situation that the centralizing assembly is unstable due to inertia offset is avoided, and the operation stability of the device is guaranteed.

The invention discloses a tuned mass vibration damper with controllable damping, and relates to the field of vibration control of offshore wind power generation equipment structures. The mass damping unit is arranged in a suspended mode, the clamping ring is coaxially arranged, the electromagnetic damping units are evenly distributed in the circumferential direction of the clamping ring, and the electromagnetic damping units are connected with the mass damping unit through winding ropes which are arranged in a radial mode to form a multidirectional synergistic composite damping system; the mass damping unit generates reverse inertia force in vibration to restrain movement of the tower and drives the electromagnetic damping unit to act at the same time, the generator is driven to generate electromagnetic damping through the one-way bearing and the speed increaser, and lossless reset is achieved through the torsion ring. The device is integrated with an energy recovery unit, vibration energy is converted into electric energy to be stored, real-time regulation and control of damping force, omni-directional vibration response and energy feedback are achieved, and the vibration reduction efficiency and the energy utilization rate are remarkably improved.

The invention relates to the technical field of crane safety monitoring, and discloses a crane hoisting overload state monitoring method and system based on digital twinning, and the system comprises a twinning modeling module, a data acquisition module, a state simulation module, an overload decision module, and a model optimization and visualization module. Deep interaction between a physical world and a virtual space is realized through digital twin bodies, limitation of a traditional monitoring method is broken through, multi-source parameters such as wind speed, load and structural stress are fused for the first time, a dynamic coupling model is constructed, nonlinear correlation of wind load, inertia force and structural deformation is captured, the problem of missed judgment of hidden risks in the traditional method is solved, and the method has a wide application prospect. An accident early warning coverage range is expanded, a deflection calculation model is established based on an improved mechanical theory, high-sensitivity detection of fine deformation of the main beam is realized, compared with a static model, the magnitude order is improved, structural damage accumulation is effectively prevented, deep correlation mining is performed on historical and real-time data, and long-time-history advanced early warning of overload risks is realized.

The utility model discloses an inner cooling oil chamber, oil cooling piston and engine, including: inner cooling oil chamber body, including oil chamber body lower part and oil chamber body upper part, oil chamber body upper part at least includes first vortex area and second vortex area, first vortex area is closer to piston center than second vortex area, and the first vortex area is closer to piston center than second vortex area. The second vortex region is closer to the piston ring groove than the first vortex region. Engine oil is sprayed into the oil inlet channel through an engine oil pump and enters the inner cooling oil cavity body through the oil inlet channel. Along with rapid and high-frequency up-and-down movement of the piston, engine oil continuously collides with the upper wall face and the lower wall face of the inner cooling oil cavity body under the action of inertia force, part of the engine oil impacts the first vortex area to form a first vortex, and part of the engine oil impacts the second vortex area to form a second vortex. The contact area of engine oil and the inner cooling oil cavity body is increased, the flowing speed of the engine oil in the vortex area is higher, a better cooling effect is generated, the temperature of a piston can be more effectively reduced, and the phenomenon that the engine oil in the inner cooling oil cavity is coked is reduced.

The invention belongs to the technical field of vibration control, and discloses a tuned mass damping device for controlling low-frequency vertical bending vortex vibration of a large-span bridge, which consists of a fixed pulley, a mass block, a high-strength light force transmission cable, a spring, a hanging ring and a damper. Fixed pulleys and mass blocks are arranged at the positive and negative maximum displacement positions of a longitudinal bridge direction mode of a main beam respectively, a suspension system is formed by a full-length force transmission cable, and the gravity of the two mass blocks is basically balanced; the mass block is connected through the spring and is close to the bridge vibration control target frequency. When the bridge vibrates, the two mass blocks generate inertia forces which are opposite in direction but overlapped with each other, the driving system and the bridge form resonance, and therefore bridge vibration is effectively restrained. The gravity of the mass block can be self-balanced, the strength and the number of the springs are greatly reduced compared with those of a traditional TMD, any low-frequency tuning can be conducted in a vertical limited space, and the engineering cost is remarkably reduced. The device can be used for controlling vertical bending and torsional vibration of various engineering structures; the damper is replaced by an actuator, so that active control can be realized or the damper can be used as a structural excitation device.

The invention provides a vehicle transportation control method and device based on a throwing box and electronic equipment, and relates to the technical field of throwing box control, a box body of the throwing box is connected with a vehicle through a 360-degree track, and the box body is correspondingly provided with a box body displacement control device; the method comprises the following steps: in response to a direction control operation for a driving direction control operation device, transmitting a direction control instruction corresponding to the direction control operation to a box body displacement control device; based on the direction control instruction, the specified vehicle body weight corresponding to the vehicle and a front road condition image of the vehicle acquired by an image acquisition device, analyzing and predicting the to-be-driven angle of the vehicle and the to-be-moved intensity of the vehicle through an AI system; and according to the to-be-driven angle and the to-be-driven moving intensity, the box body is controlled to move and / or rotate on the track through a box body displacement control device, so that the inertia force caused by the to-be-driven moving intensity and the to-be-driven angle to the box body is counteracted in advance through second displacement of the box body relative to the vehicle.

The invention belongs to the technical field of digital design of Roots blower equipment, and particularly relates to a digital twinning-based dynamic performance digital design method of a blower, which comprises the following steps of: constructing a multi-component parameterized structure model of the blower, establishing a multi-physics field coupling model of pneumatic, structural, thermal, electromagnetic and sound fields, and constructing a digital twinning model of the blower. Dynamic boundary conditions such as flow disturbance, inertia force and base disturbance are loaded, a digital twin model synchronous with a physical fan state is constructed, master-slave type strong coupling joint solution is executed, multi-field response indexes are extracted and normalized analysis is carried out, and finally optimization design parameters of the fan are output through a multi-target optimization feedback mechanism. According to the method, multi-domain balance design among fan structure performance, electromagnetic response, thermal stability and acoustic characteristics can be achieved, modeling precision and parameter optimization capacity are improved, and the method is suitable for digital development of high-reliability roots blower equipment under complex operation conditions.

The invention belongs to the technical field of truss girder hoisting, and particularly relates to intelligent hoisting equipment for a suspension bridge truss girder in an extreme wind environment and a hoisting construction method.The intelligent hoisting equipment comprises a floating crane, and a hoisting tool component is fixedly installed at the lower end of a steel wire rope of the floating crane and comprises a posture adjusting device and an offset adjusting device. According to the intelligent hoisting equipment for the suspension bridge truss girder in the extreme wind environment and the hoisting construction method, by arranging the sling component and integrating the posture adjusting device and the offset adjusting device, multi-degree-of-freedom active adjustment can be conducted on the hoisted truss girder. The offset adjusting device generates reverse inertia force by driving the mass block to move, so that horizontal swinging of the truss girder caused by wind load is effectively counteracted; the posture adjusting device accurately corrects pitching and rolling postures of the truss girder by adjusting the length of the steel wire rope set, and therefore the overall wind resistance stability and posture keeping capacity of the hoisting system are remarkably enhanced in the extreme wind environment.

The invention relates to the related technical field of four-chip bridge rectifier processing, in particular to double-end synchronous processing precision miniature MBL bridge rectifier production equipment and a production process, and the equipment comprises a chip combining mechanism, and a material placing table, a solder paste printing mechanism and a die bonding mechanism which are symmetrically arranged along the chip combining mechanism and are sequentially arranged towards the direction of the chip combining mechanism; the die bonding mechanism comprises a support frame body; two symmetrical connecting parts are formed on the connecting arm and used for connecting the swing arm, and two die bonding suction nozzles are installed at the end, away from the connecting arm, of the swing arm; the buffering shaft is connected with the connecting arm, and a buffering piece which elastically buffers in the circumferential direction is arranged between the buffering shaft and the telescopic shaft connected with the driving source; the lifting driving unit is arranged on the supporting frame body and is used for driving the buffer shaft to move axially so as to drive the die bonding suction nozzle to move downwards and reset; the buffer shaft can effectively slow down the initial rotation speed under the action of the buffer piece, so that the problem that crystal grains on the die bonding suction nozzle deviate or fall off due to the dual action of inertia force and centrifugal force is solved.

The invention discloses a critical parameter prediction method for a vertical cantilever fluid conveying pipe comprising a water injection pump and a Y-shaped nozzle, and relates to the field of fluid conveying pipe critical parameter calculation. The prediction method is based on an Euler-Bernoulli beam model and a momentum theorem, bending force, centrifugal force, Coriolis force, inertia force, gravity and additional force generated by an elbow are comprehensively considered, and an oscillatory differential equation of the fluid conveying pipe is established. The method comprises the following steps: performing dimensionless processing on an oscillatory differential equation by introducing dimensionless parameters, deducing a characteristic equation, a characteristic function and a characteristic value under a cantilever boundary condition, converting a partial differential equation into an ordinary differential equation set, and performing matrix solution; and finally, accurate prediction values of the critical flow velocity and the critical frequency can be obtained. The method can effectively reflect the influence rule of the nozzle and the concentrated mass on the vibration characteristics of the fluid conveying pipe, and realizes the accurate prediction of the critical parameters of the vertical cantilever containing the concentrated mass belt Y-shaped nozzle fluid conveying pipe.

The invention discloses a five-degree-of-freedom piezoelectric robot driven based on the inertia stepping principle, and relates to the technical field of robots, the five-degree-of-freedom piezoelectric robot comprises an upper driving system, a lower driving system, a spherical hinge system, an upper output end, a connecting rod and a driving foot; the spherical hinge system comprises a spherical hinge lower end cover, a joint ball, a joint seat, a spherical hinge friction pair, a pre-tightening bolt and a spherical hinge upper end cover; the upper driving system comprises a plurality of piezoelectric driving units, an upper connecting ring and an upper inertia ring; the lower driving system comprises a plurality of piezoelectric driving units, a lower inertia ring, a lower connecting ring and a lower output end; different sawtooth wave voltage excitation signals are applied to the piezoelectric driving unit, the piezoelectric driving unit can output bending deformation in different directions, the driving foot and the upper output end are made to move under the action of inertia force, and finally linear motion displacement output of the upper output end in the x-axis direction and the y-axis direction and rotary motion displacement output around the x-axis, the y-axis and the z-axis are achieved. The method has wide application potential in the fields of aerospace, optical equipment and the like.

The invention belongs to the technical field of transportation container equipment, and particularly relates to an unmanned underwater vehicle transportation device which comprises a tool base used for storing an unmanned underwater vehicle. The tool base comprises a bottom fixing frame, a supporting frame, a stand column, a top hanging frame and a hanging tool seat locking frame, and further comprises a stress relieving mechanism. By arranging the stress relieving mechanism, in the vehicle acceleration or deceleration motion process or the vehicle uniform-speed uphill and downhill process, the vehicle can be lifted up and down through lifting motion of jacks located at the two ends of the bottom fixing frame; the inclination angle and the inclination direction of the jacking frame and the unmanned underwater vehicle are adjusted, then the characteristic that the inclination angle decomposes inertia force and gravity is utilized, stress gathered on the lifting tool seat and the lifting tool seat locking frame by the inertia force or the gravity is effectively reduced, and the unmanned underwater vehicle is limited and borne through the cooperation of the tool base. Therefore, the transportation stability of the unmanned underwater vehicle is effectively improved.

The invention belongs to the technical field of material forming and manufacturing, and discloses a hot gas expansion-explosion composite forming method for forming a complex deep-cavity thin-wall component. According to the hot air expansion-explosion composite forming method, a mold unit, an air pressure loading unit and an explosion unit are needed; the method comprises the following steps: mold preheating; feeding and die assembly are carried out; compressed air is filled, and pre-expansion is carried out; fuel is sprayed, and explosion forming is conducted; releasing pressure; and opening the mold and taking the part. The method has the advantages that hot gas bulging forming utilizes metal high-temperature plasticity and evenly-distributed flexible air pressure loading, and the plate forming performance is improved; explosive forming has a very high deformation rate, high plastic deformation can be achieved within a very short time, and the forming performance of the plate can be further improved through the combined action of the strain rate effect and the inertia force. According to the method, the plastic deformation capacity of the material can be remarkably improved by combining the two, and forming of the complex deep-cavity thin-wall component is facilitated.

The invention belongs to the technical field of power transmission tower structure damping, and discloses an inerter particle type power transmission tower damping device with a multidirectional control effect. The inerter is introduced into the particle damper, so that the total mass of the damping device is reduced, and the light weight of the device is achieved. And in consideration of the fact that the seismic response of the power transmission tower is multidirectional motion, the arrangement mode of the particles and the inerter is optimally designed, so that the damping effect of the device is further improved. The inerter can generate inertia force opposite to the structural vibration direction, and the dynamic damping effect of the particle damper is guaranteed while the number of particles is reduced. The inerter composed of the gear and the rack is small in dead weight, compact in structure and easy to install, a power transmission mechanism has low energy loss, the gear and the rack are in rigid meshing transmission, rapid rotation of the flywheel can be achieved, the inerter has high sensitivity to sensing of earthquake response of a power transmission tower, and the inerter is suitable for popularization and application. And large rotation inertia force can be generated in a limited space.

The invention relates to the technical field of unmanned aerial vehicle flight control, in particular to a track tracking control method for a tandem dual-rotor unmanned helicopter, which comprehensively considers factors such as aerodynamic force and inertia force and is completed through structural parameter measurement, aerodynamic force analysis, kinetic equation derivation and model verification and correction. Designing a self-adaptive sliding mode controller, defining a sliding mode surface, designing a control law and a self-adaptive law, ensuring the robustness of the system, and optimizing a control strategy; in combination with model prediction control, establishing a prediction model, defining a target function, improving the track tracking precision through rolling optimization and feedback correction, and correcting prediction errors and interference influences through sliding mode control; a multi-task switching control strategy is designed, task stages are divided, parameters are set, switching conditions are determined, and a fuzzy logic reasoning or neural network algorithm is adopted to realize rapid adjustment of the control strategy. The technology can accurately track the track, enhance the robustness, improve the real-time performance, flexibly adapt to multiple tasks and have a good application prospect.

The invention relates to the technical field of measurement, in particular to a float-type water level gauge dynamic compensation detection method which comprises the following steps: collecting float angle sequence data; synchronously acquiring environment disturbance parameters; calculating the floater angle sequence data to obtain a preliminary water level value; constructing a dynamic compensation model, and outputting an inertia force correction term, a fluid damping correction term and a mechanical hysteresis correction term; the inertia force correction term, the fluid damping correction term and the mechanical hysteresis correction term are multiplied by corresponding weight factors respectively, then algebraic sum is solved, a total compensation amount is obtained, and the weight factors are dynamically adjusted and normalized according to the current wave high energy spectral density, the wind speed gradient change rate and the water temperature viscosity correction coefficient; and deducting the total compensation amount from the initial water level value, and outputting a final compensated water level value. According to the method, the problems of poor multi-physical field sensing capability and poor online parameter identification capability of a compensation method in the prior art are solved.

The invention relates to the technical field of crane control, in particular to an unmanned crane control method and system, which comprises the following steps: acquiring a running space, establishing a basic simulation space through simulation, acquiring a real-time space image, establishing an execution state space, and marking a starting point and an ending point to determine a track space; a dangerous object is identified, a safety space signal is determined, and after the safety space signal is detected, the gravity center of a transported object is obtained, a grabbing point is set, the transported object is hoisted, stress analysis is conducted, longitudinal inertia force is set, tipping and anti-tipping moments are calculated, and a deviation angle is adjusted to obtain a normal operation signal; and finally, carrying out stress analysis again according to the deviation angle, setting a transverse inertia force to calculate a horizontal direction moment, determining an acceleration critical value and setting a real-time operation acceleration. According to the method, shutdown is reduced through unmanned control, parameters are optimized, efficiency is improved, the method is adaptive to multiple scenes and multiple models, and technology upgrading is promoted.

The invention relates to the technical field of bauxite flotation, and discloses a bauxite flotation device which comprises a base, a telescopic rod is installed at the top of the base, a spring is installed on the outer ring of the telescopic rod, and a workbench is fixedly connected to the top of the spring; the vibration mechanism is mounted at the top of the base and used for vibration treatment of the workbench; and the working mechanism is installed on the top of the workbench and used for the normal flotation process. Through cooperation of the telescopic rod arranged at the bottom of the workbench and the spring and cooperation of the vibration mechanism composed of the driving motor, the cam and the cam base, high-frequency micro-amplitude vibration can be actively generated in the flotation process and after operation is finished, mineralized foam or residual chemicals attached to the inner wall of the workbench are effectively stripped through inertia force, and the flotation efficiency is improved. The wall sticking phenomenon is obviously reduced.

The invention discloses an anti-migration and anti-deformation fixing tool in an electrolytic cell transportation process, and relates to the technical field of electrolytic cell transportation auxiliary equipment. The tool comprises a base supporting frame, a side limiting mechanism, a top pressing module and a multi-stage buffering assembly. The base frame is rigidly fixed to the transportation carrier, the lateral limiting mechanism limits transverse migration of the electrolytic cell in the horizontal direction, the top pressing module achieves pre-tightening and fixing in the vertical direction, and flexible damping of the buffering assembly is combined, so that the problems of migration and shell deformation of the electrolytic cell caused by inertia force and impact force in the transportation process are effectively solved. The tool is suitable for electrolytic cells of different specifications, is convenient and fast to adjust, can remarkably improve the structural safety in the transportation process, and solves the problems of unstable limiting and poor impact resistance in an existing transportation mode.

The invention provides a multi-factor coupling gravity retaining wall reliability evaluation and optimization method, and belongs to the technical field of geotechnical engineering. The method comprises the following steps: constructing a physical model containing parameters such as self weight, friction coefficient, height, filling weight and compaction degree; establishing a multi-factor dynamic coupling model which comprises a water level time-varying model, an earthquake coefficient probability model and a compactness degradation model; constructing a limit state function integrating the soil pressure, the water pressure and the seismic inertia force; calculating a time-varying failure probability through random numerical simulation; the importance degree of each factor is quantitatively evaluated by adopting standardized indexes; optimization measures such as compaction degree improvement, water level fluctuation reduction and dead weight increase are put forward, and the effect is verified. According to the method, the problems of single-factor analysis, static modeling, importance evaluation and the like of a traditional method are solved, dynamic coupling analysis of three factors of earthquake, water level fluctuation and compactness degradation is achieved, and a scientific basis is provided for design and maintenance of the gravity retaining wall.