465results about How to "Solve Vibration Problems" patented technology

The invention relates to an acceleration or deceleration control method of numerical control system based on filter technique, which comprises the following steps: planning straight acceleration or deceleration by using the inputted workpiece program data; performing moving average filtering and filter compensation on the planned speed of the straight acceleration or deceleration to obtain a new planned speed value and a position value; performing interpolation on the position value; transmitting the interpolated position value to a servo driver in order to control a servomotor; wherein the moving average filtering of the planned speed of the straight acceleration or deceleration is implemented by adding a moving average filter after planning the straight acceleration or deceleration to control sudden changes of an accelerated speed, particularly comprising the following steps: calculating the speed with a method of planning the moving average filtering speed; changing the smooth degree of the straight acceleration or deceleration by selecting filter length (i.e. controlling the magnitude and the shape of the accelerated speed); and calculating a planned position according to the speed after filtering. The invention solves the vibration problem of a numerically-controlled machine tool during movement, and has the advantages of easy implementation, good compatibility and good flexibility.

The invention discloses a mixed induction type active electric power filter system. The mixed induction type active electric power filter system comprises a rectifier transformer, a filtering branch, a rectifier and the other filtering branch, wherein the other filtering branch comprises three passive filters and a voltage source inverter, the passive filters are connected to the voltage source inverter, the primary side of the rectifier transformer is connected to a three-phase power grid through connecting impedor, an epitaxy winding of the secondary side of the rectifier transformer is connected with the rectifier, and the passive filters are connected to three junction points between a delta winding and the epitaxy winding of the secondary side of the rectifier transformer in parallel respectively. According to the mixed induction type active electric power filter system, influence of frequency fluctuation of the power grid side and the high-capacity nonlinear load side on electric power filtering performance is eliminated; meanwhile, the problems that serious harmonic pollution, high additional loss of a master device, high vibration and noise, low system power factor and low system operation efficiency are caused by harmonic waves and idle work to an industrial power distribution and consumption system are effectively solved on the premise that electric power quality on the power grid side meets the national standard of China.

The present invention relates to a dynamic brain function detection method and system synchronous with transcranial magnetic stimulation. The system comprises a transcranial magnetic stimulation device for magnetically stimulating a targeted brain region of a subject to achieve a purpose of activating or inhibiting functions of a corresponding brain region; a functional near-infrared spectrometerfor collecting brain blood oxygen signals of the targeted brain region of the subject and other function connection related brain blood oxygen signals; an analysis module for analyzing blood oxygen signals of multiple-frequency bands of the brain blood oxygen signals; and a synchronous marking module for synchronously marking a stimulation moment in near infrared time domain signals when the transcranial magnetic stimulation (TMS) device starts to perform magnetic stimulation so as to instantly collect changes of the blood oxygen signals when the magnetic stimulation starts. The method provides a feasible scheme for researching brain disorder and cortical changes caused by the TMS and can also objectively measure an effect of the transcranial magnetic stimulation on different regions of abrain on a premise that the effect of the transcranial magnetic stimulation on the different regions of the brain cannot be quantified.

The invention relates to a compressor torque control method and torque control device. The torque control method comprises the following steps: the compressor target control torque current is obtained according to the compressor target rotating speed and actual rotating speed; compensation is performed on the target control torque current according to the compressor load characteristic and the compressor rotor actual position to obtain a reference torque current; the reference torque current is transformed into a target control torque voltage through the Clark/Park inverse transformation; and the operation of the compressor is controlled through the target control torque voltage. According to the torque control method in the invention, according to the compressor rotor inherent load characteristic and the detected rotor actual position, compensation is performed on the target control torque current in a feedforward manner, so the vibration problem of the compressor in the low-frequency operation can be solved, and the implementation is simple and effective.

The invention discloses a vibration monitor and control method and system for a wind turbine generator. The method comprises a collection step, wherein cabin vibration signals of the wind turbine generator are obtained; a calculation step, wherein according to the cabin vibration signals, cabin vibration frequency values are calculated; an identification step, wherein according to calculated vibration frequency, an oscillation-actuating source is judged; a vibration reduction step, according to the oscillation-actuating source, an oscillation-actuating frequency in control signals are filtered out. The vibration monitor and control method and system for the wind turbine generator can thoroughly solve the cabin vibration problem caused by variable pitch adjusting, the transmission chain rotating frequency and the like, and any equipment cost is not required to be added.

The invention proposes a smart vibration isolator for micro-vibration control. The smart vibration isolator for micro-vibration control comprises a housing 1, a magnetorheological elastomer 2, a force output rod 3, a sliding bearing 4, a cover board 5, a magnetic mass block 6, a piezoelectric ceramic pile 7, a pressing bolt 8, a connection base 9, a steel ball 10 and a coil 11. The smart vibration isolator adopts a cascade form of the magnetorheological elastomer and the piezoelectric ceramic pile, selects working states of the piezoelectric ceramic pile and the magnetorheological elastomer by switching control according to the excitation frequency, and achieves semi-active/full-active two-stage vibration isolation of vibration. By adopting the smart vibration isolator for micro-vibration control, the advantages of the stability, the controllability, good dynamic characteristics and large output force of the piezoelectric ceramic pile vibration isolator are considered, effective attenuation of micro-vibration of full-frequency bands including ultralow frequency can be achieved, the problem of vibration caused by uncertain stimulation of precision machining is solved, and meanwhile, the volume and the quality of the vibration isolator are reduced.

The invention relates to an oil-electricity hybrid power walking type aloft working platform. The oil-electricity hybrid power walking type aloft working platform comprises a frame, a rotary working platform arranged on the frame and a fixed arm arranged on the rotary working platform, wherein the fixed arm is provided with a hoisting mechanism; the hoisting mechanism comprises a lower arm, an upper arm and lower arm connection piece, an upper arm and a small arm; one end of the lower arm is hinged to the fixed arm and the other end of the lower arm is hinged to the upper arm and lower arm connection piece by a lower arm connection pin; the other end of the upper arm and lower arm connection piece is hinged to one end of the upper arm by an upper arm connection pin; the upper arm sleeves an upper retractable arm; the upper retractable arm is hinged to one end of the small arm by a pin; the other end of the small pin is hinged to a working bucket by a pin. The oil-electricity hybrid power walking type aloft working platform has the advantages of reasonable structure design, convenience for transportation, cleanness and environmental friendliness; noise pollution is reduced, the production cost is saved, the working span and height can be increased and energy sources are saved.

The invention relates to a novel prefabricated plate type damping track structure for rail traffic. The novel prefabricated plate type damping track structure consists of steel rails, fasteners, prefabricated plates, an elastic cushion, sealing sleeves, a vertical connecting device, a filling layer and the like, wherein the elastic cushion and the prefabricated plates can be integrally compounded in a plant; holes which penetrate through track plates in the thickness direction can be reserved in the track plates to fill the filling layer and observe the filling condition; pre-formed holes allowing supporting legs to be mounted and a hole allowing a measuring positioning sign to be mounted are formed in the track plates; a centering sign for paving positioning, an embedded component for the compound connection of the elastic cushion, hoisting nails for hoisting, an embedded component for longitudinal connection of the track plates, an embedded component for mounting contacting rails and the like can be reserved in the track plates. According to the novel prefabricated plate type damping track structure disclosed by the invention, the problems of quick and high-accuracy construction and subsequent replacement are solved, and the novel prefabricated plate type damping track structure has the characteristics of being simple in construction operation procedure, high in construction speed, high in accuracy, good in track ride smoothness, low in labor intensity and the like, and conforms to the current rail traffic requirements of being environmentally-friendly, high in efficiency and low in disease, so that the problems of vibration caused by the operation of city rail traffic vehicles and secondary structure noise can be effectively reduced.

The invention relates to a precast slab type vibration damping rail structural system and a matched construction method. The rail structural system consists of steel rails, fasteners, precast slabs, an elastic cushion layer, a sealing sleeve, a longitudinal connecting device, a filling layer and the like, wherein the elastic cushion layer and the precast slabs can be compounded as a whole in a plant. According to the engineering needs, a track board can be reserved with 1-3 holes (for infusing the filling layer and observing an infusing state) which penetrate through the track board in a thickness direction, pre-formed holes for mounting supporting legs, a hole for mounting a measuring and positioning mark, an aligning mark for laying and positioning, a pre-embedded part for composite connecting of the elastic cushion layer, lifting pins for lifting, a pre-embedded part for longitudinally connecting the track board, a pre-embedded part for mounting a contact rail, and the like. The precast track board is laid by adopting laying equipment such as a plate transporter, a crane trolley, a fine-tuning trolley and the like, so that the precast slab type vibration damping rail structural system has the characteristics of a simple construction process, high construction speed, high construction speed, good rail smoothness and low labor intensity; and the convenience problem of replacing the track board and the elastic cushion layer after operation is solved.

The invention discloses a fault location method for vibration and noise abnormality of a GIS combined electrical appliance in a substation. A GIS combined electrical appliance, a vibration test analyzer and a noise test analyzer are arranged. The GIS combined electrical appliance includes a circuit breaker, a bus, a disconnecting switch, a voltage transformer, a current transformer, and a lightning arrester. The invention provides a method for testing the vibration and noise of the GIS combined electrical appliance in a substation, thereby realizing accurate and comprehensive test result and providing the systematic and scientific test results for the production, debugging, operation and maintenance personnel. A method for vibration and noise fault analysis and location is also put forwardby combining the test method, so that the vibration and noise faults can be analyzed according to the test results to find out coherence of the key factors causing the problems and thus the fault location is realized. The fault location method has the high innovation; the blank in the field related with the vibration and noise of the current GIS combined electrical equipment is filed; and the safe and stable operation of the 110-kV substation equipment is guaranteed effectively and the high-efficiency maintenance is realized.

The invention provides a full-hydraulic ABS braking system based on hybrid power and a control method for braking energy recycling. The system comprises energy storage devices, a liquid charging valve, an electronic pedal, proportioning valves and a braking controller. The energy storage devices are connected with the liquid charging valve through pipelines. Pressure sensors are arranged on the pipelines. The proportioning valves are connected with the pipeline between the energy storage devices and the liquid charging valve. The electronic pedal is connected with the braking controller which is connected with the proportioning valves and wheel edge brakes. The objectives of the invention are to achieve the ABS function and braking energy recycling while adopting a novel hydraulic driving braking system. A traditional hydraulic booster is replaced, so a double-loop function is achieved, space occupation of the system is reduced and response time of the braking system of the whole vehicle is extended.

The invention discloses a flexible driver with controllable damping and used for a robot joint. The existing flexible driver is lag in drive response, and uncontrollable in flexibility. The inner ringof a hollow rotary platform of the flexible driver disclosed by the invention is driven by an external force, and drives an electric brush rotor and an output disc to rotate; an inner rotary disc comprises a disc body and a central stud; the inner ring of a planar torsional spring is fixed to an output disc, and the outer ring of the planar torsional spring is fixed to a cross support frame and the disc body; an outer rotary disc is born on the central stud, and compressed with an end surface opposite to the disc body, and a compression force is adjusted by an adjustment device; 2-4 grooves are formed in a part close to the edge, of the disc body; a magnetorheological fluid is injected into each groove; two fluid through holes are formed in the bottom of each groove, and the outer ends ofthe two fluid through holes are communicated by a pipeline; each pipeline is wound with a coil; and cylindrical bodies as many as the grooves are arranged on the inner end surface of the outer rotarydisc, and each cylindrical body is embedded in the corresponding groove and divides the groove into two cavities. The flexibility of the flexible driver disclosed by the invention is effectively improved, and a controllable movement flexibility degree is achieved.

The invention discloses a turning method of a thin-wall vane of a leaf disc type part, which comprises the following steps: a polyurethane foaming agent is filled in each flow channel of an impeller, i.e. a gap between two vanes; after the polyurethane foaming agent is solidified, the impeller is positioned and clamped by a special fixture, and the periphery molded surface of the vane is turned after the impeller is aligned by a lathe; and after turning is completed, the polyurethane foaming agent is eliminated by cutting or sanding. Because the polyurethane foaming agent adopted in the method has certain strength after being filled, no adverse effect is caused to the leaf disc type part, and the cutting is easy. Filling the polyurethane foaming agent between the two vanes is equivalent to supporting the vanes, so the rigidity of each vane in turning is effectively enhanced, the discontinuity of turning is simultaneously improved, and chattering and deformation in processing are relieved so as to improve the processing accuracy of the periphery molded surface of a vane of a semi-open impeller, particularly a three-dimensional impeller with a wide and deep flow channel.

The invention provides a spray coating type composite polyurethane-urea damping material for a subway tunnel. The spray coating type composite polyurethane-urea damping material is prepared from a component A and a component R in a volume ratio being (1:0.8)-(1:1.2) through reaction, wherein the component A is a semi-prepolymer synthesized by 35-60 parts of polyisocyanate with low functionality and 50-70 parts of polyether polyol; the component R comprises 15-60 parts of a diamine chain extender, 10-75 parts of amine-terminated polyether, 10-70 parts of hydroxyl terminated polyether, 1-30 parts of intercalated graphite packing and 1-30 parts of an assistant. The intercalated graphite packing comprises graphite flake layers and high-molecular polymers located between the graphite flake layers; the high-molecular polymers are introduced to gaps between the graphite flake layers with an in-situ polymerization method. The spray coating type composite polyurethane-urea damping material is environment-friendly, and the construction process is simple; furthermore, the damping effect of the material is greatly improved, and the material has great significance for solving the problems of vibration and noise of urban rail transit.

The invention relates to a touch prompting device and a wireless earphone. The touch prompting device comprises a power drive, a first magnet, a second magnet and a touch part, wherein the power drive is connected with electromagnets in the first and second magnets and used for generating an electromagnetic field through driving the electromagnets according to trigger signals; the first magnet is fixed in a shell, and the second magnet repeats a reciprocating motion of approaching and keeping away from the first magnet according to the polar variation of a self electromagnetic field or the polar variation of the electromagnetic field of the first magnet; and the touch part is connected with the second magnet, protrudes out of the shell and touches the skin of a user according to the reciprocating motion of the second magnet. The touch prompting device and the wireless earphone provided by the invention can be worn by users and can also be arranged on various electronic equipment which can be worn by the users; the touch prompting device prompts the users in a skin touching manner and can be used for solving problems which are not easily found out by users in a vibration prompting manner; and the triggered vibration force is small, the service life of the electronic equipment cannot be shortened when the touch prompting device is arranged on the electronic equipment, and the touch prompting device is energy-saving and environmental-friendly.

The invention belongs to the technical field of automobiles and particularly provides a suspended parallel hybrid power-driven system with double clutches and double motors. The system comprises an engine, two clutches, two electric-control actuating mechanisms for the clutches, motors, a gearbox, a deceleration differential, two driving half-axles, two wheels, an energy storage unit, a motor control unit and a starting motor, wherein the engine is connected with the rotors of the motors via a first clutch and a transmission shaft; the rotors of the motors are connected with the gearbox, the deceleration differential, the driving half-axles and the wheels via a second clutch and are supported on a shell; and the two clutches are respectively under the automatic control of the two electric-control actuating mechanisms for the clutches. The invention can reduce the gaps between the stators and rotors of the motors and eliminate the adverse effects of vibration of the transmission system on engines and motors, has the operation modes of pure-electricity drive, smart charging and parallel full-hybrid power and has the advantages of high efficiency, easy drive, low cost and high reliability.

The invention belongs to the field of turbochargers for internal combustion engines, in particular to a rotor supporting mechanism of a rolling bearing turbocharger. It includes a bearing sleeve and two springs, two thrust sleeves and two bearings in the bearing sleeve. The two springs are symmetrically arranged in the bearing sleeve and connected to each other. Put the spring into the thrust sleeve and apply pre-tightening force. Two bearings are respectively arranged on the end face of the thrust sleeve. Both bearings are angular contact rolling bearings. The advantage of the present invention is that ceramic rolling bearings are used instead of ordinary floating bearings, which improves the mechanical efficiency and transient response capability of the turbocharger, solves the vibration problem of the rolling bearing turbocharger, and improves the steady-state performance and performance of the turbocharger. The service life of the rolling bearing is improved, the support rigidity of the rolling bearing is improved, the limit speed of the rolling bearing is increased, the requirement of high-speed operation of the turbocharger is met, the lubrication problem of the turbocharger is solved, the reliability of the rolling bearing supercharger is improved, and the balanced transmission The force system meets the requirements for the normal operation of the rolling bearing turbocharger.

The invention belongs to the field of rotating machinery experimental mechanics, and specifically relates to an optical measuring method and apparatus for deformation and strain of a high speed rotating structural member. The optical measuring apparatus comprises a high speed rotating system for a thin disk-shaped axisymmetric structural member, an image acquisition and signal processing system and an auxiliary test system, wherein the surface of a test member of the thin disk-shaped axisymmetric structure is coated with a pattern of concentric circles and a vertical ultra high-speed rotating axis is formed; a disk type variable frequency motor is used to drive the single-point supported vertical ultra high-speed rotating axis in a vacuum chamber; a common low-speed digital camera is used to acquire the surface pattern of concentric circles of the high-speed rotating thin disc-shaped axisymmetric structure test member under the irradiation of a stroboscopic light source; and the image identification technology is used to acquire the pattern change information and obtain deformation and strain of the high speed rotating test member after processing the pattern change information. The optical measuring method and apparatus for deformation and strain of a high speed rotating structural member can acquire the stress information by measuring changes of the radius of the concentric circles, and are suitable for the mechanical robustness testing field of high speed and ultra high-speed rotating structural member, wherein the rotating speed is greater than 10000rpm.

The high performance water lubricated mechanical driving system based on new type of composite engineering material includes a high elasticity shaft coupler, a sealing device, a front water lubricated bearing, a back water lubricated bearing, and a water supplying system. It his natural water as lubricating medium and has or has not dynamic sealing device mounted through the back water lubricated bearing to constitute a closed or opened water lubricated mechanical driving system. Compared with traditional mechanical driving system, the high performance water lubricated mechanical driving system has greatly lowered friction, wear, vibration, noise and no-work loss, greatly raised reliability, saving in mineral oil and noble metal material, and environment friendship, and may be applied widely.