Apparatus and methods to reduce unwanted motion in precision instruments are described. An active vibration-isolation system may include a feedback loop that senses motion of an intermediate mass. In noisy environments, where the feedback loop would otherwise fail or provide inadequate isolation, feedforward control can be implemented to sense floor vibrations and reduce motion of the intermediate mass that would otherwise be induced by the floor vibrations. The feedforward control can reduce motion of the intermediate mass to a level that allows the feedback loop to operate satisfactorily.

A vibration suppression system includes a ground manipulator, a flexible bar structure connected to an end of the ground manipulator, and at least one vibration suppression device configured to be distributedly arranged to be attached/detached to/from the flexible bar structure and configured to be controlled to reduce vibration and deflection occurring in the flexible bar structure by dispersing a load applied to the flexible bar structure due to movement or disturbance of the ground manipulator.

A highly-efficient new-energy vibration controller integrating passive, semi-active and active control, including a multi-cavity beam, a battery assembly, a wound magnetic device, a damping piezoelectric device and an inertia mass assembly. The wound magnetic device includes a connecting rod, an electromagnetic wire wound on a bottom end of the connecting rod and a magnetic box arranged at a bottom of the inertia mass assembly. A top end of the connecting rod is fixedly connected to a bottom of the multi-cavity beam. The bottom end of the connecting rod passes through a center through hole of the inertia mass assembly and arranged in the magnetic box. The magnetic box is provided with a magnetic field. The damping piezoelectric device is sleevedly arranged on an outer wall of the connecting rod. The damping piezoelectric device and the wound magnetic device are both electrically connected to the battery assembly.

A rubber composition for anti-vibration rubber comprising, based on 100 parts by weight of ethylene-propylene-diene-based copolymer rubber (EPDM): (A) 32 to 60 parts by weight of carbon black A having an average particle diameter of 60 to 100 nm, an iodine absorption amount of 14 to 23 g/kg, and a DBP oil absorption amount of 100 ml/100 g or more; (B) 10 to 30 parts by weight of carbon black B having an average particle diameter of 40 to 50 nm, an iodine absorption amount of 35 to 49 g/kg, and a DBP oil absorption amount of 100 to 160 ml/100 g; (C) 2 to 10 parts by weight of ethylene-α-olefin copolymer; and (D) 0 to 16 parts by weight of silica. The rubber composition for anti-vibration rubber that has low dynamic magnification (small increase in elastic modulus associated with an increase in rubber deformation rate), excellent durability (bearing force against breakage due to repeated deformation of rubber), excellent heat resistance, etc., and that can be effectively used as a vulcanization molding material for a center bearing support, etc.

A camera lens suspension assembly includes a support member including a support metal base layer, a moving member including a moving metal base layer, bearings and smart memory alloy wires. The support member includes a bearing plate portion, static wire attach structures, and mount regions. A printed circuit on the support metal base layer includes traces extending to each static wire attach structure. The moving member includes a moving plate portion, elongated flexure arms extending from a periphery of the moving plate portion and including mount regions on ends opposite the moving plate portion, and moving wire attach structures. The bearings are between and engage the bearing plate portion of the support member and the moving plate portion of the moving member. Each of the smart memory alloy wires is attached to and extends one of the static wire attach structures and one of the moving wire attach structures.

A method for controlling an elastic mount configured to support a propulsion device with respect to a marine vessel, wherein the elastic mount contains an electromagnetic fluid and an electromagnet and is configured such that adjusting an amount of electricity applied to the electromagnet changes the shear strength of the electromagnetic fluid and thereby controls elasticity of the elastic mount, including applying a first amount of electricity to the electromagnet to produce a first elasticity in the elastic mount, determining that a vessel speed indicator exceeds a high speed threshold, determining that a trim position for the propulsion device is greater than a threshold trim position, detecting at least a threshold decrease in throttle demand, and applying a second amount of electricity to the electromagnet wherein the second amount of electricity is greater than the first amount of electricity, so as to decrease the elasticity of the elastic mount.

A parameter setting method includes a parameter value changing step of, when the magnitude of a deviation that is a difference between a command position and an actual position of a movable portion is greater than or equal to a prescribed value during operation of an active damper, selecting an unselected set of candidate values from among a plurality of sets of candidate values and changing the values of respective types of parameters of the active damper to the selected set of candidate values, and when the magnitude of the deviation is less than the prescribed value, not changing the values of the respective types of the parameters. After the parameter value changing step is finished, the parameter value changing step is repeated until the magnitude of the deviation becomes less than the prescribed value.

A vibration cancellation method is a vibration cancellation method for canceling vibration arriving at a seat from outside of the seat, the vibration being transmitted to a user seated in the seat. The method includes canceling, by a vibration cancellation unit (4), a vibration by outputting a cancellation signal from a position close to a position where user's head is placed when a user is seated, the cancellation signal being obtained based on a reference signal and an error signal. The reference signal is obtained by a vibration sensor (2) disposed in a position close to a vibration source outside the seat in the seat, and the error signal is obtained by an error vibration sensor (3) disposed in the position close to the position where user's head is placed when the user is seated in the seat.

A medical apparatus according to an example includes: a main body including an inputter configured to receive a user command; a display device positioned to be rotatable on one axis with respect to the main body, and extending along one plane; a locking device limiting a rotation of the display device with respect to the main body when pressure being smaller than first pressure is applied to the display device along a direction that is perpendicular to one surface of the display device; and an attenuator attenuating a vibration of the display device with respect to the main body when pressure being smaller than the first pressure is applied to the display device along the direction that is perpendicular to the one surface of the display device.

A machine assembly includes a load machine secured to a frame construction. An electrical machine is coupled to the load machine and drives the load machine. The electrical machine is secured to the frame construction via multiple intermediate elements. Frame-side main parts of the intermediate elements are secured to the frame construction and machine-side main parts of the intermediate elements are secured to the electric machine. Spring assemblies are respectively arranged between the machine-side main parts and the frame-side main parts for transferring a weight force of the electric machine from the machine-side main parts to the frame-side main parts.