135 results about "Inertial mass" patented technology

This device includes a base, a handle lever mounted so as to pivot on the base about an axis, a kinematic chain configured to transmit a movement of the handle lever to a lock of the opening control to unlock the door, an inertial safety member having a main body forming an inertial mass and a main locking element connected to the body and configured to pass, by inertia effect in the event of impact, from an inactive idle position to at least one active position of locking at least one movable element of the kinematic chain. The inertial member is movably mounted so as to pivot on the base about a second locking axis and is configured to operate in a reversible mode by adopting at least one reversible locking position and to operate in an irreversible mode by adopting at least one irreversible locking position.

An apparatus for damping vibrations includes an inertial mass disposed in a cavity in a rotatable downhole component, the rotatable component configured to be disposed in a borehole in a subsurface formation, such as a resource bearing formation, the inertial mass coupled to a surface of the cavity by a damping fluid and configured to move within the cavity relative to the downhole component. The apparatus also includes a damping fluid disposed in the cavity between the inertial mass and an inner surface of the cavity, where rotational acceleration of the rotatable downhole component causes shear in the damping fluid to dissipate energy from rotational acceleration of the rotatable downhole component and causing the rotational acceleration to be reduced.

The invention discloses a multi-point steady-state excitation system and method for a bridge load test, and relates to the technical field of bridge tests, and the multi-point steady-state excitation system comprises a main excitation device, a plurality of auxiliary excitation devices and a main controller; the main controller is configured to select a to-be-tested mode of a bridge girder; exciting the bridge girder at the maximum vibration mode of the to-be-tested mode at the frequency of the to-be-tested mode by using main excitation equipment, so that the bridge girder vibrates at a single frequency; exciting the bridge girder at a plurality of maximum vibration modes corresponding to the to-be-tested mode by using a plurality of auxiliary vibration excitation devices, and keeping a preset phase difference between the vibration of the inertial mass block of each auxiliary vibration excitation device and the vibration of the bridge girder at the position where the auxiliary vibration excitation device is located; and selecting the next to-be-tested mode of the bridge girder, and repeating the process of exciting the bridge girder to vibrate until the bridge load test is completed. The bridge can be excited to generate obvious single-frequency steady-state vibration, the purposes of static load test and dynamic load test are achieved at the same time, few excitation devices are needed, and the test result precision is high.

The present invention relates to an active damper (1) for vibration attenuation in a boring bar (100) comprising an actuator (101) with electromagnets (4) attached to a body (2) thereof, and an inertial mass (3) in a cavity (12) of the actuator (101) movable in directions perpendicular to the longitudinal direction of the actuator (101); comprising an acceleration sensor (5) in the actuator (101) and control means (9) of currents of the electromagnets (4) depending on the measurements of the acceleration sensor (5).

A watercraft comprises a motor, an inertial mass, and a fin. The motor oscillates the inertial mass about an axis, producing a torque reaction on and oscillation of the motor. Oscillation of the motor is communicated to the fin, producing thrust. The system can be operated in reverse, to generate electric power when the system is in a flowing stream of thrust fluid.

The invention relates to the field of active vibration isolation, in particular to a control method and device of an active vibration isolation device, and the active vibration isolation device comprises a controller, a load, a passive vibration isolation unit for supporting the load, a base arranged on the ground and a plurality of inertial mass actuators arranged on the load. The mass center of the base corresponds to the mass center of the load. And each inertial mass actuator is correspondingly provided with a feedback sensor, so that a plurality of feedback sensors are arranged on the load. And a plurality of feed-forward sensors are arranged on the base. The active vibration isolation control method comprises the steps that feedback acceleration collected by the feedback sensor is obtained, and feedback control force corresponding to each inertial mass actuator is determined according to the feedback acceleration. The feedforward acceleration collected by the feedforward sensor is obtained, and the feedforward control force corresponding to each inertial mass actuator is determined according to the feedforward acceleration. And determining the output force of each inertial mass actuator according to the feedback control force and the feedforward control force. And effective suppression of load vibration is realized.

The invention discloses a bridge electromagnetic inertial mass hybrid control damping system and an overall hybrid control method. The damping system comprises an inertial mass assembly, an electromagnetic assembly, a rigidity assembly and a corresponding parameter adjusting circuit. Wherein the ball screw system is used for converting linear translation into rotation, the inertial mass assembly is used for providing acceleration type inertial mass damping, the electromagnetic assembly is used for providing speed type electromagnetic damping, and the rigidity assembly is used for providing rigidity. In a normal operation stage, a parameter adjusting circuit is utilized, and the purpose of adjusting electromagnetic damping and rigidity values is achieved by changing circuit input, so that semi-active tuning is realized; under the action of an earthquake, circuit input is fixed, so that parameters of the damper are constant, and the anti-seismic robustness of the damper can be improved.

The invention provides a line spectrum damping device and method based on dynamic anti-resonance, the line spectrum damping device comprises a main mass block, a positive stiffness spring, a base, an inertial element and a self-adjusting element, the upper end and the lower end of the positive stiffness spring are fixed between the main mass block and the base respectively, and the inertial element comprises a lever and an inertial mass block; the lever is movably clamped and positioned through a flexible hinge mechanism fixed on the main mass block and the base, the inertia mass block is fixed at one end of the lever and is connected with the base through a negative stiffness mechanism, the self-adjusting element is fixed on the base, and two fulcrums are arranged at the top end of the self-adjusting element and are respectively contacted with the lever; the lever ratio of the damping device can be adjusted in real time according to the excitation frequency, automatic adjustment of the vibration isolation frequency is achieved, the vibration isolation effect is enhanced, and meanwhile the weight is reduced.

The invention discloses an aeroelastic model correction method based on frequency domain response data, and belongs to the field of aeroelastic design of aircrafts. According to the method, an aeroelastic model of a to-be-studied aircraft is constructed, a ground flight control structure coupling test is firstly carried out, correction coefficients of generalized mass, generalized damping, a generalized stiffness matrix and a control surface coupling inertia mass matrix are calculated by using frequency response data of the ground test through an optimization method, and then a flight aerodynamic servo stability test is carried out. And calculating correction coefficients of the unsteady aerodynamic coefficient matrix of the body mode and the unsteady aerodynamic coefficient matrix of the control plane deflection mode based on the corrected structural parameters, and finally realizing correction of the aeroelastic model. According to the method, the time and labor consumption of traditional manual correction is avoided, multi-variable correction can be carried out while multi-test response is considered, the problem that pneumatic correction in traditional correction is relatively difficult is solved, pneumatic correction is considered while the aircraft structure is corrected, and an accurate aeroelastic model can be obtained.

A highly dynamic motion simulator comprised of an occupant platform 22 which is supported and articulated between two vertically oriented multi-axis translation mechanisms 21 and 23. The five degrees of freedom embodiment produces motion with five degrees of freedom (FIG. 1). The six degrees of freedom embodiment adds a longitudinal translation assembly which produces motion with six degrees of freedom (FIG. 2). This design minimizes inertial mass providing high dynamic performance.

An inertial system for a vehicle door handle assembly includes a locking device to prevent the actuation of the door handle upon activation and a first inertial mass. When subjected to an acceleration force acting in a first acceleration direction, the first inertial mass moves along a first movement direction from a rest position allowing the opening of the door by actuation of the door handle, to a locking position activating the locking device. The inertial system also includes a second inertial mass, which, when subjected to an acceleration force acting in a first acceleration direction opposite the first acceleration direction, moves along a second movement direction, from a rest position allowing the opening of the door by actuation of the door handle to a locking position activating the locking device. The first movement direction is opposite the second movement direction.

The invention discloses a device and a method for synchronously measuring static and dynamic vertical displacements of a structure. The device comprises a test end container, a reference point container, a communicating pipe, a fluid medium, a displacement meter, an inertial mass block and a pressure sensor, the testing end container and the reference point container are connected through a communicating pipe, a valve is arranged on the communicating pipe, the inertial mass block is arranged in the testing end container, the upper end and the lower end of the inertial mass block are connected with the testing end container through elastic elements, and fluid media are contained in the testing end container and the reference point container. The fluid medium is set to enable the gravity borne by the inertial mass block to be equivalent to the buoyancy, and the displacement meter is set to measure and obtain the vertical displacement value of the inertial mass block; the pressure sensor is used for testing the pressure difference value caused by the height difference of fluid media in the test end container and the reference point container at the two ends of the communicating pipe. The system has the remarkable advantages of being rapid and efficient in installation and arrangement, good in structural form and natural environment adaptability, good in economical efficiency and the like.

To provide an actuation mechanism that is adaptable to a linear displacement actuator.SOLUTION: A clock movement-purpose speed governing member 1 comprises: means for adjusting inertia mass, for example, a balance spring 25 including a balance with hairspring 23 and a wound ribbon, and rigidity of the balance spring. The speed governing member includes a mechanism for actuating the adjustment means, and an actuation mechanism includes: an actuator 30 that includes a movable part mechanically linked to the adjustment means; and means for adjusting the actuator. The adjustment means includes a pivotal control lever 45, and the control lever includes a support arm and pivotal arm cooperating with the movable part of the actuator for mechanically displacing the movable part.SELECTED DRAWING: Figure 2

A method for the fine adjustment of the rate of a mechanical oscillator with an oscillating inertial mass, equipped, in a first step, with an actuator made of material suitable for irreversible local micro-expansion under the action of laser fires, to impart to an inertia-block a radial travel during suitable laser fires on a writing zone of the actuator, in a second step, the initial rate of the oscillator is set and measured, in a third step, the direction and the value of the deviation required to achieve a predetermined rate range, and of the travel to be imparted to inertia-blocks are calculated, in a fourth step, a writing zone is subjected to femtosecond laser fires to create expansion lines by local molecular expansion to radially deform the actuator, in a fifth step the rate is measured and the third step and fourth step are repeated if required.

The invention discloses a finite element modeling method for torsional vibration of a reciprocating compressor shafting, which comprises the following steps of: converting the mass of a structural part which has relative motion relative to a crankshaft in the reciprocating compressor shafting to a crank pin by utilizing an energy equivalence principle so as to simplify the analytical calculation of the torsional vibration of the shafting (otherwise, the calculation of shafting multi-body dynamics must be carried out); and a correction coefficient is provided and applied to the adjustment of the inertia mass of the flywheel and the motor rotor, so that the dynamic parameters of the shafting are convenient to optimize. According to the method, finite element modeling is achieved through ANSYS finite element calculation software APDL, the built shaft system torsional vibration finite element model has high consistency, upgrading and improvement of the technology in the using process are facilitated, and the working efficiency of reciprocating compressor shaft system finite element model building is greatly improved.

The invention discloses an MEMS (Micro Electro Mechanical System) inertial sensor with high static friction resistance. The MEMS inertial sensor includes a support structure and an inertial structure. The inertial structure comprises at least one inertial mass block, an elastic structure and a stop structure. The resilient structure is mechanically coupled to the inertial mass and the support structure such that when the support structure is subjected to acceleration parallel to the first direction, the inertial mass is movable in a direction parallel to the first direction. The stop structure is fixed relative to the support structure and includes at least one primary stop element and one secondary stop element. If the acceleration exceeds a first threshold, the inertial mass abuts the primary stop element and then rotates about an axis of rotation defined by the primary stop element. If the acceleration exceeds a second threshold, rotation of the inertial mass is terminated when the inertial mass abuts the secondary stop element.

The application belongs to the technical field of structural vibration control, and relates to a mechanical-electrical clutch variable inertial damper, which is a semi-active damping device applicable to civil structures and used for inhibiting the vibration of the structure under the action of an earthquake or wind load. The device is realized by matching a mechanical inertial system, an electrical inertial system, an energy recovery control system and an active inertial mass control system. The application ensures that the device provides an inertial force in the acceleration stage of the structure and does not provide a force in the deceleration stage of the structure. The electrical inertial system can effectively reduce the design capacity of the mechanical inertial system, and in combination with the active inertial mass control system, the semi-active variable inertial control similar to bang-bang control can be realized, and in combination with the energy recovery control system, the kinetic energy of the flywheel can be recovered in the deceleration stage.

The application discloses a parameter intelligent adjustable inertial mass damper and a control method thereof, which are applied to efficient vibration control of super-long stay cables on large-span cable-stayed bridges in the field of civil engineering, and the damper is composed of an inertial mass element, a damping element, a self-power supply system and a heat dissipation system.The inertial mass element is combined with a conductor disc and a linear module through a ball screw, and the continuous adjustment of the equivalent inertial mass is realized by using a stepping motor to control the position of a sliding block; the damping element adopts an electric eddy current structure, a damping force is generated by cutting the magnetic field of a permanent magnet and an electromagnet by a rotating conductor disc, and the real-time regulation and control of the damping force are realized by adjusting the current of the electromagnet.The application realizes the real-time calculation and self-adaptive adjustment of optimal and suboptimal control parameters of a target mode by combining acceleration spectrum analysis and an optimization algorithm, and has the advantages of high power, high efficiency, compact structure, intelligent control, self-power supply and strong durability, and the vibration reduction effect of the stay cable is significantly improved.

A stud-holder (1) for a regulating member (10) of a horological movement, the regulating member (10) including an inertial mass, for example a balance (23), a balance spring (25) including a strip (2) wound about itself in several turns, and a balance cock (22), the stud-holder (1) including a main body (31) intended to be mounted on the balance cock (42), and a stud (34) mounted on the main body (31) in a first direction, wherein the stud-holder (1) includes an arm (5) extending from the stud (34), the arm (5) being directed in a second direction under the main body (31), the second direction forming a non-zero angle with the first direction, so as to pass at least in part beneath a balance spring (25) held by the stud (34), when the stud-holder (1) is mounted on the regulating member (10).

The invention relates to a micromechanical impact counter device (4) comprising: - a frame (41); - an inertial mass (42) capable of being moved relative to the frame (41) from a first operating position to a second operating position as a result of an acceleration experienced by the micromechanical device (4) that has a value exceeding a predefined trigger threshold value; - a sprocket connected to the inertial mass (43) capable of meshing with a counting wheel (3) to rotate the counting wheel (3) by an angular pitch when the inertial mass moves from the first operating position to the second operating position; - a suspension structure (43) connecting the inertial mass (42) to the frame (41), the suspension structure (43) being capable of generating an elastic return force (F) that urges the inertial mass back to the first operating position.

A MEMS inertial sensor with high resistance to static friction is disclosed. The MEMS inertial sensor includes a support structure and an inertial structure. The inertial structure includes at least one inertial mass, an elastic structure, and a stop structure. The elastic structure is mechanically coupled to the inertial mass and the support structure so that when the support structure is subjected to an acceleration parallel to a first direction, the inertial mass can move in a direction parallel to the first direction. The stop structure is fixed relative to the support structure and includes at least one primary stop element and one secondary stop element. If the acceleration exceeds a first threshold, the inertial mass abuts the primary stop element and subsequently rotates about a rotation axis defined by the primary stop element. If the acceleration exceeds a second threshold, the rotation of the inertial mass is terminated when the inertial mass abuts the secondary stop element.

The present invention relates to an energy conversion device, and in particular to a fully enclosed pendulum inertia-driven rope-pulled wave energy power generation device, comprising an inertial mass body, an inertial mass shell, a first motor, a second motor, a third motor, and a fourth motor arranged in an outer floating body, wherein the outer floating body is a closed body, the inertial mass shell is arranged on the periphery of the inertial mass body, the inertial mass body is connected to the inertial mass shell, the inertial mass shell is suitable for driving the inertial mass body to swing, the inertial mass shell is suitable for swinging relative to the outer floating body, the inertial mass shell drives the third motor and the fourth motor to generate electricity when it swings back and forth or vibrates up and down relative to the outer floating body, and the inertial mass shell drives the first motor and the second motor to generate electricity when it drives the inertial mass body to swing left and right relative to the outer floating body. The present invention can absorb wave energy from multiple directions, improve energy utilization, and has higher working reliability.

A work string and method of absorbing a vibration at the work string. The work string includes an outer member, an inertial mass disposed within the outer member and a damping element between the outer member and the inertial mass. The damping element includes a liquid having a viscosity that increases with increasing temperature. The damping element absorbs the vibration being transferred from the outer member to the inertial mass.

The invention relates to a regulating organ (1) for a clock movement comprising an inertial mass, for example a balance wheel (23), a balance spring (25) comprising a wound ribbon (2), means for adjusting the stiffness of the balance spring, the regulating organ (1) comprising an actuation system for the adjustment means, the actuation system comprising an actuator (30) comprising a movable part (37) mechanically connected to the adjustment means, and means for adjusting the actuator (30), the adjustment means comprising a pivoting control rocker (45), the control rocker (45) comprising a pivoting arm (69), and a support arm (71) cooperating with the movable part (37) of the actuator (30) to move it mechanically.

The invention relates to a regulating organ (1) for a watch movement comprising an inertial mass, for example a balance wheel (23), a balance spring (25) comprising a wound ribbon (2) and means for adjusting the stiffness of the balance spring having a flexible element (5) arranged in series with the wound ribbon (2), the adjustment means comprising pre-stressing means (6) for applying a variable force or torque on the flexible element (5) in order to adjust the operation of the regulating organ (1), the regulating organ (1) comprising a system for actuation of the pre-stressing means (6), the actuation system comprising an actuator (30) mechanically connected to the pre-stressing means (6), the actuator (30) being configured to perform at least in part a substantially linear, preferably rectilinear, displacement to actuate the pre-stressing means (6).

This invention provides a vibration damping device and a method for designing such a device that can simultaneously tune to multiple natural vibration modes without increasing the installation space or weight. [Solution] The system includes a weight 2 attached to the building 11 (the structure to be damped) via a first spring 3, a first damping element 4 provided in parallel with the first spring 3 between the building 11 and the weight 2, and an inertial mass element 5, a second spring 7, and a second damping element 6 provided in parallel with the first spring 3 and the first damping element 4 between the building 11 and the weight 2. The inertial mass element 5 and the second damping element 6 are provided in parallel, and the second spring 7 is provided in series with the inertial mass element 5 and the second damping element 6. The period of the vibration system composed of the weight 2, the first spring 3, and the first damping element 4 is set to tune to one natural vibration mode of the building 11, and the period of the vibration system composed of the inertial mass element 5, the second damping element 6, and the second spring 7 is set to tune to another natural vibration mode of the building 11.

A regulating member for a horological movement including an inertial mass, for example a balance, a balance spring, and an index-assembly system for adjusting the rate of the balance spring, the index-assembly system including a stud-holder including a first portion and a second portion, the first portion being movable relative to the second portion, wherein the regulating member includes locking device configured to block the second portion of the stud-holder in one position with respect to a plate of the movement.

To overcome some or all of drawbacks in the conventional index systems by providing an actuation system compatible with a regulating device.SOLUTION: A regulating member 1 for a horological movement is provided, including an inertial mass, for example a balance 23, a balance spring 25, a balance cock 22, and an actuation system 20 for adjusting the rate of the balance spring. The balance spring includes a coiled ribbon and means 30 of adjusting stiffness of the balance spring, where the means is provided with a resilient element arranged in series with the coiled ribbon. The adjustment means includes a pre-stress device for applying a variable force or torque to the flexible (resilient) element. The actuation system includes an eccentric 10 for actuating the pre-stress means) of the adjustment means.SELECTED DRAWING: Figure 1

The invention relates to a speed regulating mechanism (1) for a timepiece movement, said speed regulating mechanism (1) comprising: an inertial mass, such as a balance (23); a hairspring (25) comprising a winding strip (2); the invention relates to a speed regulation mechanism (1) for a hairspring for a motor vehicle, comprising an actuating system for actuating the regulating device, the actuating system comprising an actuator (30) and a regulating device for regulating the actuator (30), the actuator (30) comprising a movable part (37) mechanically connected to the regulating device, the adjustment device comprises a pivoting control lever (45) comprising a pivoting arm (69) and a support arm (71), the support arm (71) cooperating with the movable portion (37) of the actuator (30) in order to mechanically displace the movable portion (37).

A MEMS tri-axial accelerometer is provided with a sensing structure having: a single inertial mass, with a main extension in a horizontal plane defined by a first horizontal axis and a second horizontal axis and internally defining a first window that traverses it throughout a thickness thereof along a vertical axis orthogonal to the horizontal plane; and a suspension structure, arranged within the window for elastically coupling the inertial mass to a single anchorage element, which is fixed with respect to a substrate and arranged within the window, so that the inertial mass is suspended above the substrate and is able to carry out, by the inertial effect, a first sensing movement, a second sensing movement, and a third sensing movement in respective sensing directions parallel to the first, second, and third horizontal axes following upon detection of a respective acceleration component. In particular, the suspension structure has at least one first decoupling element for decoupling at least one of the first, second, and third sensing movements from the remaining sensing movements.