An exemplary embodiment of the present invention a rotor including a lens and formed with a first driving unit, a stator formed with a second driving unit driving the rotor in response to electromagnetic interaction with the first driving unit, and a base on which the stator is fixed, wherein the rotor is brought into contact with the base, in a case the lens is in a UP posture, and the rotor is distanced from the base, in a case the lens is in a DOWN posture.

An exemplary embodiment of the present invention a rotor including a lens and formed with a first driving unit, a stator formed with a second driving unit driving the rotor in response to electromagnetic interaction with the first driving unit, and a base on which the stator is fixed, wherein the rotor is brought into contact with the base, in a case the lens is in a UP posture, and the rotor is distanced from the base, in a case the lens is in a DOWN posture.

An active inertial damper system (100) and method for damping vibrations (V1,V2) in a structure (11). An inertial mass (2) is supported by a support frame (1) via spring means (3) to form a mass-spring system (2,3) having a resonance frequency (fn). A controller (6) is configured to control a force actuator (4) to adapt the driving force (Fd) as a function of measured vibrations (V1,V2). The controller (6) comprises a filter (H) determining a magnitude (M) of the driving force (Fd) as a function of frequency (f) for the measured vibrations (V1,V2) in the structure (11). The filter (H) is configured to provide an anti-resonance dip in the magnitude (M) of the driving force (Fd) at the resonance frequency (fn) of the mass-spring system (2,3) to suppress resonant behaviour of the mass-spring system (2,3) itself.

An active inertial damper system (100) and method for damping vibrations (V1,V2) in a structure (11). An inertial mass (2) is supported by a support frame (1) via spring means (3) to form a mass-spring system (2,3) having a resonance frequency (fn). A controller (6) is configured to control a force actuator (4) to adapt the driving force (Fd) as a function of measured vibrations (V1,V2). The controller (6) comprises a filter (H) determining a magnitude (M) of the driving force (Fd) as a function of frequency (f) for the measured vibrations (V1,V2) in the structure (11). The filter (H) is configured to provide an anti-resonance dip in the magnitude (M) of the driving force (Fd) at the resonance frequency (fn) of the mass-spring system (2,3) to suppress resonant behaviour of the mass-spring system (2,3) itself.

A controller for an electromechanical transducer is provided. The controller comprises driving means operable to actuate a mechanical output of the transducer; impedance cancelling means operable to at least partially cancel an electrical impedance of the transducer; and linearising means between an input of the controller and the driving means. The linearising means are operable to generate an output signal by modifying an input signal of the linearising means to compensate for nonlinear behaviour of the transducer. The linearising means are operable to receive one or more state signals indicative of one or more state variables of the transducer, the one or more state signals comprising a velocity signal indicative of a velocity of the mechanical output of the transducer.

A controller for an electromechanical transducer is provided. The controller comprises driving means operable to actuate a mechanical output of the transducer; impedance cancelling means operable to at least partially cancel an electrical impedance of the transducer; and linearising means between an input of the controller and the driving means. The linearising means are operable to generate an output signal by modifying an input signal of the linearising means to compensate for nonlinear behaviour of the transducer. The linearising means are operable to receive one or more state signals indicative of one or more state variables of the transducer, the one or more state signals comprising a velocity signal indicative of a velocity of the mechanical output of the transducer.

A linear motor includes a magnetic assembly and a coil assembly having at least one coil positioned to magnetically engage the magnetic assembly for linear displacement between the magnetic assembly and the coil assembly. The linear motor further includes an encoder strip attached to one of the magnetic assembly and the coil assembly and an encoder reader attached to the other one of the magnetic assembly and the coil assembly to read the encoder strip during the linear displacement between the magnetic assembly and the coil assembly.

A linear motor includes a magnetic assembly and a coil assembly having at least one coil positioned to magnetically engage the magnetic assembly for linear displacement between the magnetic assembly and the coil assembly. The linear motor further includes an encoder strip attached to one of the magnetic assembly and the coil assembly and an encoder reader attached to the other one of the magnetic assembly and the coil assembly to read the encoder strip during the linear displacement between the magnetic assembly and the coil assembly.

A voice coil motor strongly attached to the base of a camera module comprises the base and a casing. The casing and the base are interlocked with each other. The casing is a hollow structure. The casing comprises a top surface and a side wall surrounding the top surface. The side wall and the base are engaged with each other. The side wall is extended in parts to form at least one extending leg. The extending leg extends to a side of the base away from the top surface and is bent toward the base.

A voice coil motor strongly attached to the base of a camera module comprises the base and a casing. The casing and the base are interlocked with each other. The casing is a hollow structure. The casing comprises a top surface and a side wall surrounding the top surface. The side wall and the base are engaged with each other. The side wall is extended in parts to form at least one extending leg. The extending leg extends to a side of the base away from the top surface and is bent toward the base.