256 results about "Vibration attenuation" patented technology

The invention relates to the technical field of transformer substations, and particularly discloses a transformer substation channel cover plate data acquisition and intelligent analysis management system and method, and the method comprises the steps: collecting cover plate vibration data and strain data through an acceleration sensor and a resistive strain gauge; vibration direction change, vibration attenuation and cover plate deformation springback time are extracted from acceleration data, the maximum amplitude, the change rate and the strain gradient are extracted from strain data, and the stress deformation characteristics of the cover plate are comprehensively represented; based on the stress deformation and springback characteristics of the cover plate, a damage evaluation model is established by adopting a neural network model, and intelligent judgment of the damage degree of the cover plate is realized; predicting a damage change trend by using a neural network, and calculating a cover plate damage acceleration trend; and according to the damage evaluation result and the damage acceleration trend, calculating the remaining to-be-maintained time of the cover plate, and automatically triggering operation and maintenance early warning when the remaining to-be-maintained time is lower than an early warning threshold value. According to the method, intelligent monitoring, prediction and active operation and maintenance management of the health state of the cover plate can be realized.

The invention belongs to the technical field of blasting vibration prediction, and particularly discloses a blasting vibration speed attenuation law prediction method based on regression analysis, and the method comprises the steps: laying monitoring points in multiple directions around a blasting source, synchronously collecting the geological parameters and mass point peak vibration speed of each point, and constructing a segmented propagation path; a single dominant propagation section is identified based on adjacent monitoring point data, independent influence of specific geological conditions on vibration attenuation is quantified by combining single-factor control regression analysis, decoupling modeling of geological factors and attenuation behaviors is realized, and meanwhile, a double-factor dominant propagation section is identified on the basis of quantizing the independent influence of the single geological conditions. And deducting a known effect through residual analysis to separate out an independent contribution of another geological parameter, and finally integrating a multi-factor influence function to construct a comprehensive attenuation model. Progressive modeling from single-factor decoupling to multi-factor collaboration is achieved, and the precision and physical interpretability of blasting vibration prediction in a complex heterogeneous stratum are remarkably improved.

The invention provides a ballastless track joint performance degradation monitoring method and system, and relates to the technical field of track joint performance monitoring, and the method comprises the steps: knocking a ballastless track plate at a track joint through a force hammer to generate excitation, collecting a vertical vibration acceleration response signal through an acceleration sensor, and synchronously recording the knocking time and static parameters. The vertical vibration acceleration response signal is preprocessed, abnormal pulses and baseline drift are removed, a vibration event sample is formed, and joint mechanics characteristic parameters including a vibration frequency parameter reflecting rigidity degradation and a vibration attenuation parameter reflecting damping are extracted. According to the method, the joint performance evaluation index is calculated in combination with the static parameters, the degradation grade is evaluated after the evaluation index is compared with the preset threshold value, an early warning signal is triggered, the joint degradation grade and position information are provided, and monitoring and evaluation of the joint performance are achieved.

The invention relates to sea and air three-dimensional unmanned rescue equipment which comprises a large-load unmanned aerial vehicle platform, a sea life rescue platform, a suspension assembly and a flexible buoyancy platform which are connected in sequence. The heavy-load unmanned aerial vehicle platform is fixed to the upper portion of the offshore life rescue platform in a rigid connection mode. The suspension assembly comprises a main ship body and a multi-body buffer structure connected with the main ship body and the flexible buoyancy platform. The multi-body buffering structure comprises a front arch, a first rear arch, a second rear arch, a first rigid sliding plate, a second rigid sliding plate, a first rocker arm type spring damping vibration attenuation module and a second rocker arm type spring damping vibration attenuation module. The first rigid sliding plate and the second rigid sliding plate are connected with the flexible buoyancy platform. Compared with the prior art, cooperation of safe take-off and landing from a mother ship, hovering search, high sea condition stable operation and flexible rescue is achieved through the four-module integrated design; rescue equipment can be quickly replaced, diversified rescue requirements are met, operation is flexible, and taking-off and landing are safe and convenient.

The invention provides an innovative design of a corrugated pipe damper integrated on a sliding main bearing aiming at the problems of transmission system abrasion and fatigue damage caused by vibration energy accumulation of the wind power main bearing under a complex wind load, and belongs to the technical field of wind power generation equipment. A traditional main bearing damping structure is low in energy absorption efficiency, insufficient in dynamic response and difficult to effectively suppress vibration. Through collaborative design of a corrugated pipe multi-stage laminated structure and a fluid energy dissipation channel, a composite mechanism for dynamically dissipating vibration energy is formed. The core of the damping device is composed of a corrugated pipe assembly, damping cavities and a main shaft adaptive structure, impact energy is absorbed through axial flexible deformation of the corrugated pipe, vibration attenuation is achieved in combination with reciprocating flowing of damping fluid in the multiple cavities, and low-frequency swing and high-frequency harmonic waves of a main bearing are synchronously restrained. According to the design, the bearing capacity is guaranteed, vibration transmission is remarkably reduced, the service life of the main bearing is effectively prolonged, the operation reliability of a unit is improved, and the damping requirement of a core transmission system of a high-power wind turbine generator is met.

The invention relates to a site micro-vibration attenuation test measuring point determination method and system, belongs to the technical field of vibration test, and solves the problem that vibration test measuring point arrangement depends on vibration source load accuracy or artificial experience in the prior art. The method comprises the following steps: determining a basic measuring point based on a target site parameter, obtaining an actual measurement vibration response, and calculating an actual measurement response transfer ratio; establishing an initial finite element model of the target site, and applying a preset load to the initial finite element model to obtain an initial finite element calculation result; according to the basic measuring points, corresponding model calculation points and predicted vibration responses are extracted, and predicted response transfer ratios are calculated; and performing model parameter updating by using the actually measured response transfer ratio and the predicted response transfer ratio, obtaining a basic finite element model, generating a vibration transfer form curve, obtaining vibration transfer characteristics, and determining the number and the positions of the measuring points. The micro-vibration transmission characteristics are accurately determined without depending on the vibration source load, and the number and the positions of the vibration attenuation test points are reasonably formulated.

The invention discloses a water-turbine generator set damping device which comprises a main structure module comprising a damping vibration attenuation unit composed of a first linear spring, a first linear damper and a first mass block; the NES module comprises a second mass block, a first cavity coaxial with the second mass block is arranged in the second mass block, and an eddy current damping unit is arranged in the first cavity; the U-shaped flexible hinge comprises a U-shaped damping cylinder and a U-shaped flexible hinge unit arranged in the damping cylinder, the flexible hinge unit comprises a plurality of unit double-shaft flexible hinges which are sequentially connected in series through a connecting base body, the damping cylinder is filled with magnetorheological fluid, and the two ends of the flexible hinge unit are connected with the damping cylinder respectively. By adopting the combination mode of the main structure module, the U-shaped flexible hinge and the NES module, the vibration frequency band of 10-200 Hz can be covered, broadband vibration reduction is achieved, the vibration amplitudes in different directions such as the axial direction and the radial direction can be absorbed, and the vibration reduction requirement of a water turbine generator set in the complex hydraulic environment can be met.

The invention discloses an anti-vibration stabilizing device for an air outlet pipeline of an electrolytic cell, a ring-shaped pipe frame is arranged on the periphery of a material pipeline in a full-surrounding or partial-surrounding manner, and a multi-layer composite vibration isolation part is filled between the inner side of the ring-shaped pipe frame and the contact side of the material pipeline; a self-adaptive damping adjusting piece is arranged between the ring-shaped pipe frame and the fixed frame body; the device further comprises a vibration data acquisition mechanism arranged on the material pipeline. And the multi-layer composite vibration isolation part has the wear-resisting and broadband damping capabilities through the wear-resisting layer and the damping layer, and the high-frequency vibration attenuation rate is larger than or equal to 90%. A honeycomb air cavity and a closed cavity are filled with media or open cavity micropores are designed, the rigidity and damping can be adjusted in a self-adaptive mode, and low-frequency buffering or specific-frequency resonance suppression is achieved. The regular hexagonal honeycomb structure is high in geometric stability and uniform in stress dispersion, the material consumption is reduced by 30-40%, the weight is reduced, and the anti-fatigue life is prolonged. The air cavity is axially and flexibly arranged, vibration in different directions is absorbed in a targeted mode, and the multi-dimensional damping effect is improved.

The invention discloses an aerodynamic damping rapid estimation method for a rotating blade, and the method comprises the steps: selecting a test impeller, obtaining an attenuation signal of a blade of the test impeller based on an impact test, and obtaining a structural damping ratio of the blade according to the attenuation signal through a free attenuation method and a nonlinear least square method; a BTT test technology is introduced, and the total damping ratio of the blade is obtained based on the BTT test technology and a nonlinear least square method; based on the structural damping ratio and the total damping ratio of the blade, an aerodynamic damping estimated value of the blade is obtained, and estimation of aerodynamic damping is achieved; according to the method, the BTT data analysis technology and the free vibration attenuation theory are combined, quantitative estimation of the aerodynamic damping ratio of the rotating blade is achieved, and the aerodynamic damping ratios of all the blades under different vibration pitch diameters can be determined; the pneumatic damping contribution of the rotating blade is quantitatively expressed, the vibration response mechanism of the blade in the service state can be deeply understood, and long-acting safe operation of a unit is guaranteed.

The invention discloses a directional traffic vibration attenuation method for a periodic pile-in-row composite foundation, and relates to the technical field of traffic vibration control and foundation treatment.The method comprises the specific steps that firstly, prefabricated modular pile bodies integrating various sensors and hydraulic adjusting assemblies are arranged at preset pile positions; continuously collecting various types of traffic vibration data; transmitting to a terminal for processing, and extracting a waveform category and a load dominant frequency parameter; according to the driving assembly, wave division type regulation and control are carried out, and pile row period parameters are dynamically optimized to form double matching; and finally finishing site construction deployment. According to the invention, traffic vibration data are comprehensively and accurately captured, and the problems of incomplete data acquisition, inaccurate waveform identification and the like in the prior art are solved; a double-matching mechanism is constructed, directional regulation and dynamic adjustment of piling parameters are performed according to different wave modes, the matching degree is made to reach 90% or above, automatic optimization and targeted attenuation of different types of traffic vibration can be achieved, the vibration attenuation effect is ensured to be stable and directional, and the limitation of the prior art is broken through.

The invention relates to the technical field of functional materials, in particular to a supramolecular aggregate modified vinyl resin material and a preparation method thereof. The supramolecular aggregate modified vinyl resin material is prepared from the following raw materials in parts by weight: 1.3 to 4.6 parts of aliphatic isocyanate monomer, 5 to 15 parts of micromolecular polyol, 0.8 to 2.9 parts of ureido pyrimidone monomer, 1 to 3 parts of curing agent, 50 to 100 parts of vinyl resin and 0.5 to 2.3 parts of accelerant, so that the modified vinyl resin material has reversible dynamic mechanical property; good damping vibration attenuation performance can be provided; and the material has good mechanical properties and excellent impact toughness, and can be widely applied to various fields as a high-performance functional material.

The invention relates to a suspension system and a vehicle, the suspension system comprises a power assembly and a semi-active damping pull rod, the semi-active damping pull rod is arranged at at least one end of the power assembly in the Y direction of the whole vehicle, one end of the semi-active damping pull rod is connected with the power assembly, and the other end of the semi-active damping pull rod is connected with an auxiliary frame; the semi-active damping pull rod is arranged at at least one end of the power assembly in the Y direction, so that the dynamic stiffness of the suspension system is lower and the vibration isolation performance is better under the idling and acceleration working conditions, the damping is larger under the low-frequency starting working condition, and the vibration attenuation of the power assembly is faster.

The invention discloses an underground blasting safety assessment method and device based on the BIM technology and a medium, and relates to the technical field of underground engineering safety assessment, and the method comprises the steps: collecting blasting geological data, blasting design parameters and surrounding environment information of a blasting site, and constructing a blasting region BIM model; performing blasting vibration spectrum analysis on the blasting geological data and the blasting design parameters, extracting vibration spectrum data, integrating the vibration spectrum data into a blasting area BIM model, dynamically displaying a vibration attenuation field through a finite element analysis algorithm, and obtaining a vibration attenuation graph; performing three-dimensional modeling by analyzing a stress concentration area in the vibration attenuation map and the vibration spectrum data and combining geological information in the BIM model of the blasting area, predicting a fracture extension path in the blasting process, and identifying a high fracture propagation risk area; and potential risks in blasting operation are effectively reduced, and safety protection on personnel and the environment in the construction process is ensured.

The invention provides an electric control shock absorber control method and device, a vehicle and a computer readable storage medium, and relates to the technical field of vehicle control. The method comprises the steps that for an electric control shock absorber corresponding to each wheel, expected damping force needing to be generated by the electric control shock absorber is determined; according to the expected damping force and the actual driving mileage of the vehicle, compensation is conducted on control current of the electric control shock absorber, and compensation control current is obtained; and the compensation control current is adopted to control the electric control shock absorber to work, so that the actual damping force generated by the electric control shock absorber reaches the expected damping force. The control current of the electric control shock absorber can be compensated, so that the problem of damping force reduction caused by performance attenuation of the electric control shock absorber is compensated, the vibration attenuation effect is guaranteed, and the running stability of a vehicle is kept.

The invention discloses a partition blasting construction analysis method for a tunnel crossing a cultural relic protection area, and relates to the technical field of blasting construction, and the method comprises the steps: building a three-dimensional geologic model and a cultural relic three-dimensional model, and constructing a finite element modal analysis environment of the blasting construction of the cultural relic protection area; the method comprises the following steps: applying a cultural relic resonance frequency in a finite element modal analysis environment of blasting construction in a cultural relic protection area, determining a limit damage threshold value of a cultural relic and a cultural relic danger node, and calculating an initial limit value of a blasting vibration safety speed according to the limit damage threshold value of the cultural relic and the cultural relic resonance frequency; calculating a cultural relic vulnerability evaluation index according to the cultural relic vulnerability influence data, and correcting the blasting vibration safety speed initial limit value to obtain a blasting vibration safety speed correction limit value; and delimiting a three-level risk area according to the cultural relic vulnerability evaluation index, and calculating and outputting the explosive quantities of the buffer area and the general construction area by using a Sadgowski formula as a vibration attenuation model. Construction vibration is ensured to be within a safety threshold, and the risk of damage to cultural relics is reduced.

The invention discloses an electromagnetic capture connecting mechanism with a spring flexible support, and relates to the technical field of electromagnetic capture. The device comprises a base, an inner cavity of the base is fixedly connected with a fixing assembly, the inner cavity of the base is fixedly connected with a flexible supporting assembly through the fixing assembly, the top of the flexible supporting assembly is fixedly connected with an electromagnetic coil, and the flexible supporting assembly comprises a mounting boss fixedly connected to the top of the base. According to the supporting structure, rigid supporting is changed into elastic deformable supporting, the stress of the end face of the electromagnetic coil and the supporting piece is effectively reduced, meanwhile, the damping spring and the electromagnetic coil are integrally designed, the buffering function is added while the electromagnetic performance is kept unchanged, the fatigue life of the supporting piece is prolonged, and the service life is prolonged. The magnetic core and the butt joint face are kept coaxial through the elastic buffering effect, force-displacement coupling energy absorption is achieved at the same time, mechanical impact at the electromagnetic capture moment is avoided, relative vibration attenuation in the butt joint process is accelerated, and capture precision is improved.

A solar heliostat with pneumatic flow guide load shedding and friction damping vibration attenuation functions comprises a main beam, a plurality of auxiliary beams perpendicularly fixed to the main beam, a connecting piece fixed to the main beam, a plurality of inclined struts connecting the connecting piece and the auxiliary beams and the like. The supporting rod is fixed to the main beam, the friction damper is installed at the tail end of the supporting rod, the steel cables are connected with the friction damper, the main beam and the auxiliary beam respectively, and the triangular-prism-shaped covering body wraps the inclined struts in an attached mode. The friction damper comprises a friction base body, a friction element connected with a steel cable, a pressing plate matched with a friction concave surface of the friction base body to clamp the friction element, a pressure adjusting structure A for adjusting the pressing force of the pressing plate, a guide roller for guiding the steel cable connected with the friction element, and a pressure adjusting structure B for adjusting the tension force of the connected steel cable, according to the invention, airflow separation is guided to reduce the wind load through the prism aerodynamic configuration on the back of the heliostat; the friction force of each friction element and the pre-tightening force of the connected steel cable are independently set, the outer rigidity of the heliostat surface is enhanced, wind disturbance vibration is reduced, and the service optical precision is improved.

The utility model discloses a vibration reduction component of clothes processing equipment and the clothes processing equipment. The vibration reduction component comprises a hanging rod and a damping component, the suspension rod is axially and movably arranged in the damping cavity in a penetrating manner; the damping structure is arranged on the suspender in the damping cavity in a sleeving manner; a certain distance is formed between one axial end of the damping cavity and the damping structure, so that after vibration exceeds a preset amplitude, the damping cavity abuts against the damping structure to start to generate damping force; the damping cavity is provided with air holes used for moisture removal. The ventilation holes are formed in the damping cavity of the variable-damping vibration attenuation component, the damping cavity can exhaust moisture outwards through the ventilation holes, moisture in the damping cavity can be avoided, and therefore the vibration attenuation component is prevented from being damaged or generating peculiar smells.

The application provides a design method of a broadband multi-modal vibration suppression damping material based on fractal geometry, comprising: constructing an initial geometric configuration of the damping material, the damping material being composed of a periodic arrangement of a three-dimensional unit cell structure in a plane; layering the unit cell structure to construct a parameterized model of the unit cell structure by using a fractal dimension of the unit cell structure and layer structure parameters; constructing a vibration impedance transfer equation according to the parameterized model of the unit cell structure, determining input impedances of the innermost layer and the outermost layer, and determining vibration attenuation amounts of the unit cell structure in multi-target frequency bands by using the input impedances of the innermost layer and the outermost layer; and optimizing the configuration and the parameterized model of the unit cell structure until the vibration attenuation amounts of the unit cell structure in the multi-target frequency bands meet load platform requirements. The broadband multi-modal vibration suppression damping material based on fractal geometry constructed can realize efficient dissipation of 10-1000 Hz broadband vibration energy and solve the frequency selectivity limitation of traditional homogeneous damping materials in multi-frequency vibration suppression.

The utility model relates to the technical field of neodymium-iron-boron magnet machining, and discloses neodymium-iron-boron grinding machining equipment which comprises a machining table, a moving assembly, a clamp assembly and a vibration reduction assembly. According to the neodymium-iron-boron grinding equipment, the first clamping plate and the second clamping plate are driven by the two-way screw rod to move synchronously, and a first flexible clamp and a second flexible clamp are combined, so that centering suspended clamping of a neodymium-iron-boron magnet is achieved, bottom surface contact is avoided, multi-surface grinding can be completed without repeated clamping, a worm and a worm wheel are matched and meshed, and the grinding efficiency is improved. Meanwhile, an air cylinder controls a limiting rack and a plane gear to be meshed or separated, a double-locking mechanism is formed, the anti-torque capacity is improved while the overturning precision is guaranteed, and a rubber damping block in an inner cavity of the machining table can absorb high-frequency grinding vibration; the stainless steel spiral spring arranged outside in a sleeving mode isolates vibration of low-frequency equipment, the rubber damping pad on the bottom face of the machining table is combined, the overall vibration attenuation rate can be increased, and the grinding quality is improved.

The application discloses a kind of partitioned blasting construction analysis methods for tunnel crossing cultural relic protection zone, it is related to blasting construction technical field, including establishing three-dimensional geological model and cultural relic three-dimensional model, the finite element modal analysis environment of cultural relic protection zone blasting construction is constructed;Under the finite element modal analysis environment of cultural relic protection zone blasting construction, the limit damage threshold of cultural relic and cultural relic dangerous node are determined by applying cultural relic resonance frequency, according to the limit damage threshold of cultural relic and cultural relic resonance frequency, the initial limit value of blasting vibration safety speed is calculated, and the blasting vibration safety speed correction limit value is obtained by correcting the initial limit value of blasting vibration safety speed according to the cultural relic vulnerability evaluation index calculated by the vulnerability influence data of cultural relic;According to the three-level risk area of cultural relic vulnerability evaluation index, the output is calculated by using the Sadovsky formula as the vibration attenuation model for the explosive quantity of buffer zone and safety zone.It is ensured that construction vibration is within the safety threshold, and the risk of cultural relic damage is reduced.

The invention discloses a low-wind-load and damping vibration attenuation solar disc-type condensation system which comprises a condenser, a double-shaft tracking device, a main beam, a liquid amount adjusting system, a plurality of steel cables and the like. The condenser is composed of a steel framework, a plurality of mirror surface units, a covering body, a plurality of liquid storage bags and the like, wherein the steel framework is composed of a plurality of radiation beams and cross rods which are arrayed circumferentially; the mirror surface units are fixed on the steel framework; the covering body wraps the steel framework on the back of the condenser to form a streamline aerodynamic shape so as to reduce wind load, and only the reflecting surface of the mirror surface unit bears wind pressure, so that the wind load is effectively reduced; the mirror surface unit adopts a light high-rigidity structure with a light supporting back frame and an embedded bearing framework, so that the deformation of a reflecting element under wind pressure is reduced; the double-shaft tracking device is installed on the back of the condenser and is close to a pneumatic center to reduce the wind moment load. The liquid level of the liquid storage bag and the liquid storage box which is installed on the main beam and can move is adjusted, self-adaptive liquid damping energy dissipation and vibration reduction of the light condensation system under the wind disturbance effect are achieved, and the service optical precision is improved.

The invention relates to the technical field of damping vibration attenuation, in particular to an asymmetric damping characteristic magnetorheological damper which comprises a cylinder barrel, a piston assembly, a piston rod and magnetorheological fluid filled in the cylinder barrel. The piston assembly comprises a piston head connected with the piston rod, an excitation winding arranged in the circumferential direction of the piston head, a lower pressing plate arranged at the end, away from the piston rod, of the piston head, an upper pressing plate arranged at the end, provided with the piston rod, of the piston head, and a baffle capable of axially moving between the piston head and the upper pressing plate. A damping channel is formed between the upper pressing plate and the lower pressing plate; and the baffle is arranged at the end part of the damping channel, slides on the piston rod, can axially move in response to the flowing direction of the fluid, partially blocks the damping channel and changes the effective flowing section of the fluid passing through the damping channel. The piston has the effect of reducing the occupation of the radial space of the piston head.

A fluid flow regulation assembly (1) includes: movable parts, for being actively mechanically driven, including at least one of a fluid flow regulating body for regulating a fluid flow and a rotor of a motor for driving the regulating body; and power electronics for controlling the motor. The movable parts and / or the power electronics are a source of vibration. Static parts are exposed to traveling vibrations originating from the source of vibration and include at least one of the group: a pump housing (3), a valve housing, a motor housing (5), a pump base and an electronics housing (7). The static parts include a structural element (11) with at least one vibration attenuation section (9) for attenuating vibrations: that originate from the source of vibration; travel along the structural element and have a vibration frequency above a pre-determined minimum vibration frequency (fmin).

The vibration reduction and isolation bearing supporting structure comprises a bearing mounting sleeve, a vibration reduction and isolation layer, a supporting fixing ring, a vibration suppression adjusting layer and a limiting strip. A plurality of groups of strip-shaped bosses are uniformly arranged on the peripheral wall of the bearing mounting sleeve at intervals, and a space groove is formed between every two adjacent strip-shaped bosses; each vibration reduction and isolation layer is fixed on one group of strip-shaped bosses; the inner circumferential wall of the supporting and fixing ring is fixed to the multiple vibration reduction and isolation layers. Each vibration suppression adjusting layer is arranged between one vibration reduction and isolation layer and the supporting and fixing ring; each limiting strip is arranged in one space groove, the outer end of each limiting strip is fixedly connected with the supporting and fixing ring, and the inner end of each limiting strip extends in the radial direction of the transmission shaft; the vibration reduction and isolation layer sequentially comprises an inner-layer low-frequency vibration reduction and isolation layer, a middle-layer medium-frequency vibration reduction and isolation layer and an outer-layer high-frequency vibration reduction and isolation layer from inside to outside in the radial direction of the transmission shaft. The radial vibration attenuation of the transmission shaft of the water surface ship can be effectively realized on the basis of keeping the overall structure stable.

A scroll compressor is provided with a resonance part (90) that attenuates vibrations of a predetermined frequency generated by a refrigerant gas compressed by a fixed scroll and an orbiting scroll. A center-side compression chamber (20A) communicating with a discharge port (21C) formed in an end plate of the fixed scroll is formed between a scroll-shaped wrap plate (21B) of the fixed scroll and a scroll-shaped wrap plate (22B) of the orbiting scroll, and a back-side compression chamber (20B) adjacent to the center-side compression chamber (20A) is formed between the back side of the scroll-shaped wrap plate (21B) and the ventral side of the scroll-shaped wrap plate (22B). A ventral compression chamber (20C) adjacent to the center-side compression chamber (20A) is formed between the ventral side of the scroll-shaped wrap plate (21B) and the rear side of the scroll-shaped wrap plate (22B), and in the resonance unit (90), refrigerant gas is guided from the ventral compression chamber (20C) in a state where the refrigerant gas compressed in the center-side compression chamber (20A) flows into the ventral compression chamber (20C) via the discharge port (21C).

The invention relates to the technical field of mixed loading explosive trucks, and discloses a five-stage telescopic arm and dynamic stability control coupling system of an on-site mixed loading explosive truck. The system comprises a high-precision sensing system, a dynamic modeling system, a coupling control system, a precise execution system and a safety monitoring system. The arm length, the gravity center position and the rotational inertia are calculated in real time through the time-varying parameter online identification module, the coupling control system executes feed-forward compensation, envelope calculation and gain scheduling at the same time based on the time-varying parameter online identification module, and the safety monitoring system calculates the safety operation range and triggers emergency arm falling when the range exceeds the limit. A multi-sensor data fusion and weighted Kalman filtering algorithm is adopted to realize accurate positioning and dynamic stability control of the five-stage telescopic arm under a complex working condition. The technical problems that in the prior art, due to flexible deformation, parameter time varying and external disturbance, the positioning precision is low, vibration suppression is poor, and the instability risk is high are solved, and the advantages that the tail end positioning error is smaller than or equal to 5 mm, the vibration attenuation rate is larger than or equal to 88%, and the control response lag is smaller than or equal to 50 ms are achieved.

The invention discloses an operation state monitoring method and device of a cable crimping pipe, electronic equipment and a storage medium, and belongs to the technical field of cable accessory crimping pipe monitoring, and the method comprises the steps: obtaining the temperature data and vibration acceleration data of the cable crimping pipe; calculating an inherent frequency and a vibration attenuation equivalent time constant corresponding to the cable crimping pipe according to the vibration acceleration data; comparing the temperature data with a preset temperature early warning threshold value, comparing the inherent frequency with a preset inherent frequency early warning threshold value, and comparing the vibration attenuation equivalent time constant with a preset vibration attenuation equivalent time constant early warning threshold value; according to the method and the device, the defect score corresponding to the cable crimping pipe is obtained according to each comparison result, and defect early warning is performed on the cable crimping pipe according to the defect score, so that the problems that a manual inspection method in the prior art is low in efficiency and potential problems are difficult to find in time can be solved.

To suppress vibration attenuation generated when the vibration is transmitted from a vibration unit to a sensor unit, and provide sufficient haptic feedback to an operation body.SOLUTION: An input device 100 includes: a touch sensor 10 having a contact surface 10a which allows an operator to input an operation instruction to an air-conditioning device mounted on a vehicle, the contact surface being brought into contact with an operation body of the operator, and extending along a predetermined direction, the touch sensor being configured to detect a contact state between the operation body and the contact surface 10a; a vibration element which is fixed to the touch sensor 10 and generates vibration along the predetermined direction; a fixed section 30 fixed to the vehicle and formed to extend in the predetermined direction; a support section 40 which supports the touch sensor 10 to the fixed section 30 so that the touch sensor 10 can be moved with respect to the fixed section 30 in a moving range along the predetermined direction; and a control unit which controls the vibration element so as to generate vibration along the predetermined direction in accordance with the touch sensor 10 detecting the contact state.SELECTED DRAWING: Figure 6

An input device is provided with: a touch input unit mounted on a steering wheel of a vehicle and supported so as to be vibratable; a detection unit that detects an input operation on the touch input unit; a vibration output unit that vibrates the touch input unit; and a control unit that drives the vibration output unit, the control unit causing the touch input unit to vibrate by driving the vibration output unit using a first signal when the input operation is detected by the detection unit, the input device being provided with a vibration transmission member, the vibration transmission member is provided on a vibration transmission path that transmits vibration from the touch input unit to the steering wheel, and the first signal drives the vibration output unit at a frequency of a vibration attenuation region in which a resonance magnification of a vibration system provided on the vibration transmission path is less than zero.