Abstract: Provided is a vibration actuator that includes: a coil; a core around which the coil is wound, the core including both ends projecting from the coil; a yoke formed of a magnetic material and disposed opposite to the both ends of the core at a position adjacent to the both ends of the core with a gap provided between the yoke and the both ends of the core in a direction orthogonal to a winding axis of the coil; and an elastic part fixed between the core and the yoke and configured for elastic support to enable a movement between the core and the yoke in a direction opposite to at least one of the both ends of the core.

Abstract: The present disclosure relates to a winding for an electrical machine. The winding comprises at least one flat conductor having at least one turn to form the winding, and the at least one flat conductor comprises a substantially L-shaped, U-shaped or V-shaped cross-section. The present disclosure also relates to an electrical machine that includes the winding and an aircraft that includes the electrical machine.

Abstract: A vibrating motor includes a stationary portion, a movable element having a magnet member and capable of vibrating in a first direction, and an elastic member. The stationary portion has a coil that applies a driving force to the magnet member when the coil is energized, and a case that accommodates the movable element and the coil therein. The movable element has a holder member that holds one end portion in the first direction of the magnet member. The elastic member is connected to the holder member. The case has a case notch. The case notch is notched toward the other side in the first direction from one end in the first direction of the case. The holder member has a holder notch that is notched toward one side in a second direction perpendicular to the first direction. The case notch and the holder notch overlap as viewed in the second direction.

Abstract: A vibration motor is used for a terminal device. The terminal device is provided with a middle frame having a first avoiding hole. The vibration motor includes a housing. The housing is provided with an accommodating space inside. The housing includes a first wall plate. The first wall plate is provided with a first protruding portion that protrudes outwards. The first protruding portion is hollow inside so that a first accommodating compartment is formed. The first accommodating compartment communicates with the accommodating space. When the vibration motor is mounted on the middle frame, an outer surface of the first wall plate faces the middle frame and the first protruding portion is accommodated in the first avoiding hole.

Abstract: A movable body of an actuator includes a first yoke to which a first magnet facing a coil from a Z1 direction is fixed, and a second yoke to which a second magnet facing the coil from a Z2 direction is fixed. The portion of the first yoke to which the first magnet is fixed consists of two members: a first inner member and a first outer member. The portion of the second yoke to which the second magnet is fixed consists of two members: a second inner member and a second outer member. The portions surrounding both sides of the coil in the X direction bond first connecting plate portions of the first outer member and second connecting plate portions of the second outer member.

Abstract: A fixing body configured to house a movable body including a magnet, and including a coil surrounding an outer periphery of the magnet and an outer yoke surrounding an outer periphery of the coil, the fixing body being configured to support the movable body so as to allow the movable body to vibrate back and forth in a vibration direction orthogonal to a radial direction, wherein the outer yoke includes a plurality of openings dispersed in a circumferential direction and provided at the same position in the vibration direction to keep a balance of a magnetic path configured together with the magnet and the coil in the circumferential direction.

Abstract: A rotary reciprocating driving actuator includes: a movable member including a shaft part and a magnet; and a fixing body including a core assembly including a magnetic pole core with an integral structure including a plurality of magnetic poles, a plurality of coils disposed next to the plurality of magnetic poles, and a magnetic path core to which the magnetic pole core is assembled, wherein the core assembly is disposed such that the plurality of magnetic poles faces an outer periphery of the magnet, wherein a magnetic flux that passes through a magnetic path configured of the magnetic path core and the magnetic pole core of the integral structure is generated through energization of the plurality of coils, and the movable member is rotated back and forth around an axis of the shaft part through electromagnetic interaction of the magnetic flux and the magnet.

Abstract: A resonant vibration actuator includes a casing, a mover, a plurality of electromagnet sets, two elastic suspensions, and a connecting circuit. The casing is provided with connection terminals for connection on the outside of the casing. The mover has a mover frame, a plurality of permanent magnet units, and two magnetic backs. The permanent magnet units and the magnetic backs are arranged in the mover frame and the electromagnet sets are arranged between the permanent magnet units. Elastic suspensions are connected to the casing and the mover respectively through two connection portions at both ends. The connecting circuit is used to connect the electromagnet sets and the connection terminals outside the casing. By energizing the electromagnet sets, the electromagnet sets act on the permanent magnet units to make the mover move relatively in the casing to generate vibration.

Abstract: A vibration generating device includes a housing; a vibration body in the housing; an elastic support member fixed to the housing and supporting the vibration body; and a driver that applies a vibration force to the vibration body. The elastic support member includes a vibration plate configured to support the vibration body; a front fixed plate disposed in front of the vibration plate and fixed to the housing; a rear fixed plate disposed behind the vibration plate and fixed to the housing; a first elastic plate connecting one of a left or right end of the vibration plate to the front fixed plate; and a second elastic plate connecting the other one of the left or right end to the rear fixed plate. The first elastic plate is isolated from the rear fixed plate, and the second elastic plate is isolated from the front fixed plate.

Abstract: Electromagnetic inertial force generators are provided, which include radially polarized permanent magnets providing bias flux across axial gaps to combine with axial coil flux to linearize the actuator output. Coil cooling in the electromagnetic inertial force generators is improved by embedding the coils in the stationary portion of the actuator, allowing for direct transfer of coil heat, and reducing oscillating stresses on coil leads.

Abstract: A high-temperature superconducting flux pump system comprises a flux pump body, a superconducting load, and a stator group. A double-pancake coil group comprises at least one double-pancake coil. The stator group comprises at least one stator. The flux pump body has an air gap for receiving the stator group. The superconducting load and the stator group are connected to form a closed circuit. The high-temperature superconducting flux pump system has a simpler structure, solves the problem of low charging rate of magnets, and greatly reduces the power cost without changing the magnet structure and winding cost.

Abstract: A vibrator includes a frame, a swing unit, and an elastic member. The swing unit is disposed within the frame and holds a magnet. The elastic member connects the swing unit and the frame. The swing unit is movable with respect to the frame while deforming the elastic member. The frame, the swing unit, and the elastic member are integrally molded with each other.

Abstract: Energy generating system that generates energy from an external source includes a frame having two vertically spaced apart supports and at least one rod extending therebetween. An electromagnetic power generating arrangement is between the supports and includes a movable power generating coil, a first stationary power generating coil that interacts with the movable coil at an upper position in an upward path of movement of the movable coil, and a second stationary power generating coil that interacts with the movable coil at a lower position in a downward path of movement of the movable coil to generate electricity which is conveyed through a cable to an electricity processing system. The movable coil is connected to each rod, and the movable coil is lifted from the lower position to the upper position along each rod, ideally through energy from an external source.

Abstract: Examples are disclosed that relate to backing up data objects. One example provides, at a computing device, a method, comprising detecting one or more conditions triggering backup of a data object, and in response to detecting the one or more conditions, accessing the data object to retrieve, from metadata associated with the data object, instructions for backing up the data object. The method further comprises executing one or more backup sequences specified by the instructions in which at least a portion of the data object is backed up to one or more storage devices.

Abstract: In an actuator, damper members which connect a movable member and a fixed member are arranged at two places between the end portion of the shaft of the movable member on an L1 side and the opening portion of the first holder of the fixed member and between the end portion of the shaft of the movable member on an L2 side and the opening portion of a second holder. Each of the damper members includes a gel damper member serving as a connection member which is continuously arranged in a gap in a radial direction between the movable member and the fixed member over the entire circumference. In the gel damper member, an inner circumferential portion is fixed to the shaft through a cylindrical first member, and an outer circumferential portion is fixed to the fixed member through a cylindrical second member.

Abstract: A motor including a first part having an outer peripheral portion and a second part having an inner peripheral portion facing the outer peripheral portion, the first part and the second part being configured to rotate relative to each other, includes a plurality of coils on one of the outer peripheral portion and the inner peripheral portion, and a plurality of magnets on the other of the outer peripheral portion and the inner peripheral portion at positions facing the plurality of coils, wherein the plurality of magnets includes a first magnet portion configured to apply a thrust to at least one of the plurality of coils in a rotation direction and a second magnet portion configured to apply a thrust to at least one of the plurality of coils in a direction intersecting the rotation direction, when an electric current is applied to the plurality of coils.

Abstract: A method for operating at least one electromechanical actuator of a motor vehicle, wherein the actuator is designed to convert mechanical power into electrical power during operation of the motor vehicle in stochastic feed-in processes as a function of a feed-in efficiency predetermined by a feed-in operating point of the actuator, which electrical power is fed into an energy storage device of the motor vehicle, includes detecting the start of a feed-in process by a means of detection and, at the start of the feed-in process, setting a feed-in operating point of the actuator, wherein the feed-in efficiency is 50% or less.

Abstract: An electromagnetic linear actuator, which comprises a first and a second element. One element is a magnetic oscillator with at least one magnet, and the other element is a magnetic stator with at least one magnet. The two elements are movable relatively linearly to one another and the magnetization directions of the oscillator and of the stator are parallel. Either the stator comprises two opposing identical stator poles or the oscillator comprises two opposing identical oscillator poles. Furthermore, a method for producing a mechanical movement by means of an actuator. Either magnetization of a stator of the actuator takes place such that the stator comprises two opposing identical stator poles, or magnetization of an oscillator of the actuator takes place such that the oscillator comprises two opposing identical oscillator poles.

Abstract: The present invention relates to a magnetic guiding device having a stator and a slide movable along a guiding direction relative to the stator, the stator and the slide being magnetized or magnetizable such that a magnetic field extending through the stator and the slide generates a magnetic supporting force on the slide acting along the guiding direction. To improve the running properties of the slide by avoiding differential slip, jerking and varying friction, according to the invention, the magnetic field extending through the stator and the slide simultaneously generates a magnetic pretensioning force which urges the slide and the stator against each other.

Abstract: The present disclosure discloses a linear motor having a housing with an accommodation space, a vibration unit and a driving unit received in the accommodation. The vibrator unit includes a weight with a receiving space and a magnet unit fixed on the weight and inside the receiving space. The driving unit includes an iron core received in the receiving space, two pole pieces respectively fixed on two opposite ends of the iron core along a vibration direction and a coil wound around the iron core. A groove is provided on the pole piece and faces the magnet unit along a first direction perpendicular with the vibration direction. The distance between the pole piece and the magnet unit increases, effectively decreasing the magnetic attraction force between the pole piece and magnet unit and avoiding the non-linear vibration of the linear vibration motor.

Abstract: The proposed vibrational energy harvester comprises a frame (118), a mass (114) coupled to first and second primary flexures (110, 112) which are configured to flex and allow the mass to move in a first direction (130), a plurality of secondary flexures (120, 122) which are configured to flex and allow the mass to move in a different second direction (132), and a transduction assembly configured to convert movement of the mass and flexures into electrical energy, preferably of electrodynamic or piezoelectric type. Each of the primary flexures is coupled to a secondary flexure at a position spaced from the mass. The resonant frequency of torsional vibration modes can thereby be raised to a frequency higher than the frequency band of ambient vibrations, which effectively prevents the energy harvester from vibrating in undesirable torsional modes that would result in wear between components.

Abstract: One of the objects of the present disclosure is to provide a linear vibration motor which improves the rigidity of the whole system and ensures enhanced stability. The present disclosure provides a linear vibration motor having a housing body; a stator including at least two solenoid assemblies with parallel axes; a vibrator installed in the housing body; and an elastic connector suspending the vibrator in the housing body. The vibrator includes a first magnet assembly being located between two adjacent at least two solenoid assemblies and including a first magnet and a second magnet. Magnetization directions of the first magnet and the second magnet are opposite and parallel to an axial direction of the solenoid assembly.

Abstract: A device that converts linear motion into electricity using the exiting movement of a system or equipment such as electric vehicles, motorcycle, or similar equipment. This device can replace the shock absorber of an existing electric vehicle generating electricity that can be used to charge the batteries extending the range of the vehicle. The device is simple an efficient and it comprises of a screw, a plurality of gears used to amplify rotation, a rotor that has magnets, and a stator that allows the coils to produce electricity.

Abstract: The present disclosure provides a vibration motor having a housing with an accommodation space; a vibration member and a stator in the accommodation space. The vibration member includes a weight having a main body with an accommodation cavity and a protruding part formed by extending from diagonal corners of the main body along a vibration direction of the vibration member, and a magnetic circuit system accommodated in the accommodation cavity. A position limiting gap is formed between the protruding part and the housing along the vibration direction of the vibration member. One of the objects of the present disclosure is to provide a vibration motor with improved stability of the whole system.

Abstract: Provided is a vibration actuator that includes: a coil; a core around which the coil is wound, the core including both ends projecting from the coil; a yoke formed of a magnetic material and disposed opposite to the both ends of the core at a position adjacent to the both ends of the core with a gap provided between the yoke and the both ends of the core in a direction orthogonal to a winding axis of the coil; and an elastic part fixed between the core and the yoke and configured for elastic support to enable a movement between the core and the yoke in a direction opposite to at least one of the both ends of the core.

Abstract: A vibrator includes a frame, a swing unit, and an elastic member. The swing unit is disposed within the frame and holds a magnet. The elastic member connects the swing unit and the frame. The swing unit is movable with respect to the frame while deforming the elastic member. The frame, the swing unit, and the elastic member are integrally molded with each other.

Abstract: A curved haptic actuator according to an embodiment may comprise: a housing having a receiving space and having a shape where the receiving space and an outer appearance thereof are bent outward; a vibration unit disposed in the receiving space, being movable along the longitudinal direction of the housing, and having a shape bent upward; elastic bodies connected to an inner wall of the housing and both sides of the vibration unit; and a magnetic field generation unit which is installed on the inner wall of the housing and generates a magnetic field and applies the magnetic field to the vibration unit.

Abstract: A transmitting assembly (114, 214, 334) configured to transmit electric power in a universal wireless charging device (102, 200, 302) is presented. The transmitting assembly (114, 214, 334) includes a first coil (116, 216, 316) embedded in a printed circuit board (220) and configured to transmit a first AC voltage signal having a first frequency. Also, the transmitting assembly (114, 214, 334) includes a second coil (118, 218, 318) disposed on the printed circuit board (220) and configured to transmit a second AC voltage signal having a second frequency, wherein the second frequency is different from the first frequency, and wherein the first AC voltage signal having the first frequency and the second AC voltage signal having the second frequency are used to wirelessly charge a plurality of receiver devices (104, 106) having different frequency standards.

Abstract: A removable brush head for a personal groom device, the removable brush head having a stationary portion, wherein the stationary portion is annular and includes a plurality of outwardly-extending brush bristles. The removable brush head also includes a movable portion positioned within the stationary portion, wherein the movable portion is configured to at least partially rotate relative to the stationary portion, and further wherein the movable portion includes a plurality of outwardly-extending brush bristles. Additionally, the removable brush head includes a locking collar, wherein the locking collar is slidably couplable to the stationary portion so as to axially retain the movable portion within the stationary portion while allowing the movable portion to at least partially rotate relative to the stationary portion.

Abstract: A linear vibration motor and an electronic device are provided. The linear vibration motor comprises: a magnetic conductive body; a vibrator comprising a permanent magnet; and a linear movement support, wherein the vibrator is mounted on the linear movement support to move along a linear movement path delimited by the linear movement support, wherein the magnetic conductive body is provided in a direction of the linear movement path near the vibrator for interacting with the permanent magnet, such that the vibrator tends towards a balanced position in the linear movement path in a non-activated state, wherein the magnetic conductive body is made of soft magnetic material, wherein the linear movement support comprises at least one guide shaft along which the vibrator can move axially, and wherein the magnetic conductive body is a magnetic conductive ring surrounding the vibrator.

Abstract: [Object] To provide a compact, high-output actuator device allowing force control. [Solution] An actuator device 1000 includes an electromagnetic coil member 110 provided over a prescribed width on an outer circumference of a cylinder 100, and a movable element 200 slidable as a piston in the cylinder 100. The movable element 200 has a magnetic member 202, and is moved relatively by excitation of the electromagnetic coil member 110. Fluid is supplied to first and second chambers 106a and 106b such that when the movable element 200 is to be moved relatively, the movable element 200 is driven in the same direction.

Abstract: A vibration generator includes a housing, a first vibrator, and a second vibrator. The first vibrator includes a hollow yoke having a through hole, a magnet disposed within the through hole of the yoke, and a first elastic support member. The second vibrator includes a coil disposed above or below the magnet within the through hole of the yoke, and a second elastic support member to which the coil is fixed and that is disposed to extend from the inside to the outside of the through hole of the yoke and that is fixed to the housing. The first vibrator vibrates at a first natural frequency in a direction connecting both side portions of the yoke. The second vibrator vibrates at a second natural frequency that is different from the first natural frequency, in the direction connecting the both side portions of the yoke.

Abstract: A rig control interface includes a plurality of interface systems. Each of the interface systems is configured to manipulate a rig control based on a signal received from an automated rig control system. The interface systems includes a mechanical control interface. The mechanical control interface includes an actuator configured to mechanically move a control handle from a first position to a second position responsive to the signal.

Abstract: A faraday generator structure disposed between an upper platform and a lower platform, where the faraday generator structure includes a magnet, a coil structure, and a guide shaft. The magnet, of the faraday generator structure, coupled to the guide shaft configured to pass through an inner aperture area of the ring structure during a compression and rebound of a dampener positioned between the upper platform and the lower platform, where a voltage is produced as the magnet passes through the inner aperture area of the ring structure. The dampener, of the faraday generator structure, configured to compress under an additional load applied to an existing load on a top surface of the upper platform. The faraday generator structure configured to provide the voltage to an electrically coupled power storage unit.

Abstract: Implementations relate to detecting user touch on a controller handle. In some implementations, a non-controlling mode of a control system is activated, and in the non-controlling mode, one or more actuators are controlled to cause a vibration to be provided on a handle of a controller. The vibration is sensed with one or more sensors, and a difference in the vibration is determined to have occurred relative to a reference vibration using the one or more sensors, where the difference satisfies one or more predetermined thresholds. A controlling mode of the system is activated in response to determining the difference in the vibration, and the vibration is modified on the handle in response to detecting the change in the vibration.

Abstract: A vibrator includes a frame, a swing unit, and an elastic member. The swing unit is disposed within the frame and holds a magnet. The elastic member connects the swing unit and the frame. The swing unit is movable with respect to the frame while deforming the elastic member. The frame, the swing unit, and the elastic member are integrally molded with each other.

Abstract: In accordance with one aspect of the present disclosure, an electronic device includes a housing, a contact member attached to the housing, and a vibration generating device. The vibration generating device is fixed to the contact member or the housing. A gap is formed between a surface of the vibration generating device facing the housing and a surface of the housing facing the vibration generating device.

Abstract: A valve, having a valve housing, in which a housing interior is formed, in which a movable valve slide is located. The valve slide is impinged upon by a compression spring that is supported via a supporting element on the valve housing. The supporting element has a supporting wall, from which a plurality of supporting arms protrudes, which axially overlap the valve slide in each axial position. On the supporting arms guide surfaces are formed for linear guidance of the valve slide. The supporting arms are springily deflectable and in each case have a radial support surface, with which they are supported on the valve housing.

Abstract: Provided is a vibration actuator that includes: a fixing part including a coil, and a core around which the coil is wound, the core including both ends projecting from the coil; a movable part disposed adjacent and opposite to the both ends of the core with a gap provided therebetween in a direction crossing with a winding axis of the coil, the movable part including a yoke formed of a magnetic material, the movable part being fixable to an operation contact surface part that is operated by contact; and a plate-shaped elastic part fixed between the movable part and the fixing part, the plate-shaped elastic part including an elastically deformable bellows-shaped part, the plate-shaped elastic part elastically supporting the movable part to be movable with respect to the fixing part in a direction opposite to at least one of the both ends.

Abstract: A personal care cleaning device (10) including a housing (12), a resonant drive actuator (20), which includes a rotor (24) having a first moment of inertia (Jr) and a stator (22) having a second moment of inertia (Js); a first plurality of leaf spring elements (60) having a first spring constant (krh), each leaf spring element of the first plurality of leaf spring elements (60) being connected the housing (12) and to the rotor (24) such that each leaf spring element of the first plurality of leaf springs elements (60) extends radially from the rotor (24) to the housing (12), each leaf spring element of the second plurality of leaf spring elements (62) being connected to the housing (12) and engaging with the stator (22), wherein the ratio of the first (krh) and second (ksh) spring constants is sufficiently similar to the ratio of the first (Jr) and second moments (Js) of inertia such that there is substantially no resulting torque transmitted to the housing (12) during operation.

Abstract: A method in an electronic device includes determining, with one or more processors, an operating condition of the electronic device influencing one or more magnetic fields measured by a voice coil motor sensor of the electronic device. The method includes obtaining, by the one or more processors from a memory of the electronic device, an expected voice coil motor sensor measurement that is a function of the operating condition. Thereafter, the method includes causing, by the one or more processors, a voice coil motor driver to modify a voice coil motor drive signal until the voice coil motor sensor detects the expected voice coil motor sensor measurement, thereby compensating for effects of the operating condition affecting the voice coil motor.

Abstract: An apparatus comprises a circuitry and an acoustic-capture tile having a surface that is to face an acoustic source that is to emit a first acoustic wave having a first frequency and a second acoustic wave having a second frequency. The acoustic-capture tile comprises a first acoustic-capture subtile electrically coupled to the circuitry, the first acoustic-capture subtile to resonate at the first frequency, wherein the first acoustic-capture subtile is to capture the first acoustic wave and to convert the first acoustic wave into a first electric current in response to resonance at the first frequency. The acoustic-capture tile also comprises a second acoustic-capture subtile electrically coupled to the circuitry, the second acoustic-capture subtile to resonate at the second frequency, wherein the second acoustic-capture subtile is to capture the second acoustic wave and to convert the second acoustic wave into a second electric current in response to resonance at the second frequency.

Abstract: The present application discloses a linear motor, which includes a housing having a receiving cavity, a vibrator received in the receiving cavity, a stator received in the receiving cavity, and a flexible support connecting to the housing and suspending the vibrator in the receiving cavity. The stator includes an iron core fixed to the housing and a coil winded on the iron core. The iron core includes a first iron core and a second iron core perpendicular to the first iron core, the coil includes a first coil winded on the first iron core and a second coil winded on the second iron core, and the winding directions of the first coil and the second coil are perpendicular to each other. The linear motor of the present invention not only effectively widens the working frequency band of the motor, but also enriches the vibration effect of the motor.

Abstract: In accordance with one aspect of the present disclosure, a vibration generating device includes a protruding part; a base provided with the protruding part and formed of a magnetic body; an annular coil surrounding the protruding part; a plate facing the base and formed of a magnetic body; and an elastic member supporting the plate with respect to the base. The plate and the base constitute magnetic circuit.

Abstract: An embodiment of the invention provides a linear vibration motor. The linear vibration motor includes a base with a containing space, a vibration unit arranged in the containing space, an elastic piece suspending the vibration unit in the containing space, and a magnet assembly fixed to the base and driving the vibration unit to vibrate. The vibration unit includes a weight, a containing groove penetrating through the weight and at least one pair of coils which are oppositely fixed to the weight. The magnet assemblies has two magnets which are respectively fixed on two opposite sides of the base. The two magnets are at least partially located in the containing grooves, and are magnetized in the vibration direction. Compared with the related art, the linear vibration motor is improved in vibration performance and reliability.

Abstract: The present disclosure provides a six-cylinder opposed free piston internal combustion engine generator. The generator comprises two free piston internal combustion engine sets, one opposed piston internal combustion engine set and two linear generator sets. Air entering cylinders is subjected to first-stage compression in low-pressure cylinder sets in the free piston internal combustion engine sets and the opposed piston internal combustion engine set and then subjected to second-stage compression in high-pressure cylinder sets, and a high pressure gas produced after the combustion is subjected to first-stage expansion in the high-pressure cylinder sets and then subjected to second-stage expansion in the low-pressure cylinder sets.

Abstract: The present invention provides a vibration sensor, which comprises a circuit board having an accommodating space. A sensing assembly is disposed in the accommodating space. A recess for magnet sliding is disposed in the sensing assembly. Dispose a magnet in the recess and then dispose a coil layer on an arbitrary side or both sides of the sensing assembly. Furthermore, a lubricating layer is coated on the recess. Alternatively, the recess can be a vacuum structure or a hollow cross-sectional structure for reducing the friction between the recess and the magnet. Alternatively, the coil layer can be coated with a protective layer or multiple layers can be stacked. Without increasing the area of the sensor, the sensing on the variation of magnetic flux can be improved. Accordingly, the vibration sensor according to the present invention can achieve wideband detection of vibrations.

Abstract: A fluid rotor and a fluid stator. The fluid stator surrounds the fluid rotor. The fluid stator has an intake end and a discharge end. The fluid stator is shaped to be inserted into a wellbore. A shaft passes through a rotational axis of the fluid rotor. The shaft is attached to the fluid rotor to rotate in union with the fluid rotor. The shaft defines a central fluid passage that extends from the intake end of the fluid rotor to the discharge end of the fluid rotor. A balance piston surrounds the shaft. The balance piston extends from an outer surface of the shaft to an inner surface of the fluid stator. The balance piston is positioned at the intake end.

Abstract: An example cantilever assembly includes a cantilever including an anchor configured to be coupled to a support, a tip, and an arm positioned between the anchor and the tip, a hollow conductive tube positioned at the tip of the cantilever, and a magnet suspended inside the hollow conductive tube with a first spring and a second spring. The first spring and the second spring are positioned at a first end and a second end of the hollow conductive tube respectively, and the magnet is positioned between the first spring and the second spring. The magnet is configured to move coaxially inside the hollow conductive tube as permitted by the first spring and the second spring, and the magnet suspended inside the hollow conductive tube operates as a tuned mass damper (TMD) to limit a resonant response of the cantilever assembly.

Abstract: A method for installing an inertial sensor unit includes: attaching a substrate to a structure with a magnet; and attaching a case accommodating an inertial sensor, to the substrate. The case is provided with a first attachment part. The substrate is provided with a second attachment part. In the attaching the case, the first attachment part and the second attachment part are fitted together to attach the case to the substrate. The inertial sensor has a base part, a moving part coupled to the base part, a physical quantity detection element arranged at the moving part, and a mass part arranged at the moving part. The mass part is made of a non-magnetic material.