11 results about "Simple harmonic motion" patented technology

This invention discloses a parameter estimation method and system for the forward and inverse models of an automotive electromagnetic valve-controlled shock absorber. The method includes the following steps: driving the shock absorber to perform simple harmonic motion at a set stroke and frequency under different currents; constructing a parameterized model of the shock absorber based on the changes in output force during the compression and recovery strokes; constructing a parameter estimation objective function to estimate the parameters of the parameterized model; fitting the estimated parameters as a function of the current to construct the forward model of the shock absorber, which calculates the damping force based on the current state of the shock absorber; selecting key variable parameters in the forward model that change with the current to calculate the sensitivity coefficient; constructing the inverse model of the shock absorber, generating the desired damping force using the forward model, and solving for the current corresponding to the desired damping force based on the inverse model. This invention can adapt to the dynamic characteristics of CDC shock absorbers under different road conditions, accurately meet the real-time modeling needs of complex road conditions, and significantly improve the practicality and response efficiency of the model.

The utility model relates to the technical field of simple harmonic motion analysis under the action of a magnetic field, in particular to a simple harmonic motion analysis device and equipment based on a torsional pendulum under a magnetic field condition, and the device comprises a magnetic field torsional pendulum mechanism, a data acquisition mechanism and a control mechanism, the magnetic field torsional pendulum mechanism comprises a torsional pendulum assembly and a magnetic field generation module, and a metal ball in the torsional pendulum assembly is located in a magnetic field generated by the magnetic field generation module. The data acquisition mechanism comprises an encoder and a photoelectric door, and the encoder is mounted on a rotating shaft of the metal ball and is in contact with the metal ball; the photoelectric door is arranged on a motion path of the metal ball, and when the encoder synchronously rotates along with the metal ball, the edge of a coded disc of the encoder passes through a detection area of the photoelectric door; and the control mechanism is connected with the encoder and the photoelectric door. According to the utility model, automatic data acquisition and processing can be realized, and the motion state of the pendulum ball can be accurately monitored in real time.

This application discloses a vibration damping device for spinning drums in textile machinery, relating to the field of vibration damping technology in spinning machinery. The device includes a rod sleeve, lubricating oil, a threaded rod, a threaded rod buffer tube, a vibration damping spring assembly, and an oil lifting assembly. The vibration damping spring assembly adopts a variable pitch hollow spring body structure with a denser upper section and a sparser lower section. It has multiple oil control sections evenly arranged along the spiral direction of the variable pitch spring body. Each oil control section has an oil inlet hole and a movable membrane fixed outside the oil inlet hole. The movable membrane uses magnetic attraction to open and close the oil inlet hole and adjust the actual opening area of ​​the oil inlet hole during rebound, achieving real-time adaptive control of the oil flow. This enables improved response speed for adaptive oil flow control, enhanced vibration damping consistency due to temperature adaptation, strengthened damping effect for unidirectional flow, effective suppression of simple harmonic motion to improve equipment stability, and optimized cooling efficiency to extend service life.

The invention discloses an azimuth gamma measurement method, system and equipment for a rotary steering system and a medium, and relates to the technical field of oil and gas drilling. The method comprises the following steps: S1, acquiring an acceleration sensor signal and a magnetic sensor signal in a rotating state in real time; s2, performing low-pass filtering processing on the acceleration sensor signal and the magnetic sensor signal collected in the S1; s3, acquiring azimuth gamma rotation period information based on the magnetic sensor signal obtained in S2, and then converting the rotation period into rotation angular frequency; s4, constructing a simple harmonic motion equation according to the rotation angular frequency, and matching a phase corresponding to the acceleration sensor signal in each period by using the simple harmonic motion equation; and S5, calculating the azimuth gamma at the position corresponding to the acceleration sensor signal by using the simple harmonic motion equation matched with the acceleration sensor signal in the step S4. According to the method, approximately ideal recovery of the dynamic acceleration measurement signal can be realized, so that the azimuth gamma measurement precision on the basis is improved.

The invention discloses a spinning roller damping device for textile machinery, and relates to the technical field of spinning machinery damping, and the spinning roller damping device comprises an insertion rod sleeve, lubricating oil, a threaded rod, a threaded rod buffer pipe, a damping spring assembly and an oil lifting assembly; the whole damping spring assembly is of a variable-pitch hollow spring body structure with the upper portion being dense and the lower portion being sparse and is provided with a plurality of oil control sections evenly arranged in the spiral direction of a variable-pitch spring body, and the surfaces of the oil control sections are provided with oil inlet holes and fixedly provided with moving films located on the outer sides of the oil inlet holes. The movable film realizes the opening and closing of the oil inlet hole and the adjustment of the actual opening area of the oil inlet hole during rebounding through a magnetic attraction effect, so that the real-time self-adaptive control of oil flowing is realized; the technical effects that the oil flow self-adaptive control response speed is increased, the temperature self-adaptive performance damping consistency is improved, the one-way flow reinforced damping effect is enhanced, simple harmonic motion effectively restrains equipment stability improvement, the cooling efficiency is optimized, and the service life is prolonged can be achieved.

The utility model relates to the technical field of physical experiment teaching aids, in particular to a simple harmonic motion experiment instrument, which comprises a base, a liquid spraying device, a support arranged on the base and a paper feeding device arranged on the base, the support comprises a cross rod, a first vertical rod and a second vertical rod, the first vertical rod and the second vertical rod are arranged on two opposite sides of the cross rod, and the cross rod is provided with a cycloid and connected with a pendulum ball. A gap exists between the lowest point of the swing ball in the natural state and the base, a spring is fixed to the first vertical rod and is horizontally placed in the natural state, one end of the spring is detachably connected with the swing ball, the liquid spraying device comprises a spraying pipe, and the liquid outlet end of the spraying pipe is fixedly connected with the swing ball; a spring oscillator experiment and a simple pendulum experiment are integrated on one device, so that students can conveniently compare two simple harmonic motion phenomena on the same platform, the essence and generality of the simple harmonic motion can be deeply understood, and the teaching effect is optimized. Meanwhile, through the detachable connection design, quick switching between a spring oscillator experiment and a simple pendulum experiment is facilitated, and different experiment requirements are met.

The application discloses a method for optimizing a reverse cam mechanism profile and evaluating dynamic stability, comprising the following steps: constructing a simple harmonic motion cam profile equation containing parameter correction based on the motion law of a crank slider mechanism; establishing a four-degree-of-freedom dynamic equation containing time-varying contact stiffness of the reverse cam mechanism based on Newton's second law; calculating the gas pressure and gas stiffness in the cylinder by using the ideal gas polytropic process theory; calculating the curvature radius of each point of the cam profile equation, and constructing a stiffness matrix of the reverse cam mechanism in combination with the time-varying contact stiffness and the gas stiffness; solving the four-order time-varying natural frequency of the reverse cam mechanism corresponding to the stiffness matrix, and analyzing the unstable domain under parameter excitation by using the Floquet theory to determine the parameter value range of the simple harmonic motion cam profile equation containing the parameter correction.

The invention discloses a method and a system for estimating parameters of forward and inverse models of a vehicle electromagnetic valve control shock absorber. The method comprises the following steps of: driving the shock absorber to do simple harmonic motion at a set stroke and a set frequency under different currents; constructing a vibration damper parameterized model based on the change of the output force of the vibration damper in the compression stroke and the recovery stroke; constructing a parameter estimation objective function, and estimating parameters of the damper parameterized model; fitting the estimated parameters into a current function, constructing a shock absorber positive model, and calculating damping force by the shock absorber positive model according to the current state of the shock absorber; key variable parameters changing along with current in the shock absorber positive model are selected for sensitivity coefficient calculation; and constructing a shock absorber inverse model, generating an expected damping force by using the shock absorber positive model, and solving a current corresponding to the expected damping force based on the shock absorber inverse model. The method can adapt to dynamic characteristics of the CDC shock absorber in different road conditions, accurately adapt to real-time modeling requirements of complex road conditions, and remarkably improve model practicability and response efficiency.

A rod pumped well fullness coefficient calculation method based on an electrical parameter curve belongs to the technical field of rod pumped well deep well pump fullness coefficient calculation, and comprises the following steps: S1, curve understanding: actually measuring an operation electrical parameter curve of a pumping unit motor; s2, determining a unit appearing in a reciprocating manner in the actual measurement curve as a cycle of the oil pumping unit, and marking the abscissa of the horsehead running to the uppermost end as C and the abscissa of the horsehead running to the lowermost end as A in the cycle curve; s3, finding out an abscissa D of a pumping unit polish rod suspension center load sudden change point from the point C to the point A; s4, the ratio beta'of the unloading stroke time to the polish rod stroke time is calculated; and S5, converting the time ratio into a displacement ratio by using a pumping unit simple harmonic motion model formula. According to the method, only an electrical parameter curve is adopted, synchronous testing of a dynamometer is not needed, influences of balance adjustment, parameter adjustment, belt replacement and the like are avoided, and influences of mechanical vibration are avoided. The calculation formula is converted by a pumping unit simple harmonic motion model, and the calculation result of the fullness coefficient is more accurate.

The invention discloses a simple harmonic motion module structure, and belongs to the technical field of machine manufacturing. The structure comprises a stator, a moving part and a guide mechanism, the stator is provided with a magnetic conductive shell and an internal coil, and the moving part is arranged in an inner cavity of the shell and composed of a permanent magnet and magnetizers at the two ends of the permanent magnet. Electromagnetic driving force is generated by electrifying the coil to drive the moving part to do reciprocating motion through the guide mechanism; when power is cut off, the moving part is automatically reset to the balance position through magnetic attraction force formed between the permanent magnet and the magnetic conductive shell, and magnetic spring type self-centering is achieved. Electromagnetic drive and magnetic reset are combined, a traditional mechanical transmission chain and a reset spring are omitted, and the electromagnetic reset mechanism has the advantages of being compact in structure, fast in response, small in abrasion, accurate in reset and capable of supporting high-frequency adjustable simple harmonic motion and is suitable for precise reciprocating motion occasions such as textile beating-up, optical scanning and medical equipment.

A grinding device (100), comprising: a grinding medium disc (1), on which a grinding material is provided; a motion platform (2) bearing the grinding medium disc (1) and driving the grinding medium disc (1) to move along a certain path; a driving mechanism (3) providing driving power for the motion platform (2); a base (4) used for supporting the motion platform (2); and a grinding disc (5) used for keeping a workpiece abutting against the grinding material on the grinding medium disc (1), wherein the path is formed by superimposing a simple harmonic motion along a x-axis and a simple harmonic motion along a y-axis.