Disclosed is an interaction system between a controller and a VR application. The interaction system includes a controller including a first actuator configured to move a mass and a first processor configured to control an operation of the first actuator; and a content execution device configured to execute an application according to a control signal received from the controller and generate a feedback signal to transmit the generated feedback signal to a controller when a virtual object change event occurs during the application execution, wherein the first processor of the controller controls the first actuator when the feedback signal is received to move the mass and move a center of gravity. According to the present disclosure, since the center of gravity and the length of the controller operated by the user in reality may be changed in linkage with a change of the virtual object displayed on the display while executing the VR application, it is possible to greatly improve the immersion and feeling of use of the user.

Disclosed is an interaction system between a controller and a VR application. The interaction system includes a controller including a first actuator configured to move a mass and a first processor configured to control an operation of the first actuator; and a content execution device configured to execute an application according to a control signal received from the controller and generate a feedback signal to transmit the generated feedback signal to a controller when a virtual object change event occurs during the application execution, wherein the first processor of the controller controls the first actuator when the feedback signal is received to move the mass and move a center of gravity. According to the present disclosure, since the center of gravity and the length of the controller operated by the user in reality may be changed in linkage with a change of the virtual object displayed on the display while executing the VR application, it is possible to greatly improve the immersion and feeling of use of the user.

A braking device including: a piezoelectric element; and a braking portion. The braking portion is configured to be fixed to a member when the piezoelectric element is in a first state, and to be slidable along the member when the piezoelectric element is in a second state. The piezoelectric element changes from one state to another state when a voltage is applied.

A short-travel nanoscale motion stage and a method for measuring thermally-related hysteresis data are provided. A stator unit of a left two-pole electromagnet and stator units of two inchworm motors are fixed on a right side surface of a left foundation frame, and an active unit of the left two-pole electromagnet and actives of the two inchworm motors are fixed on a left side surface of a stage moving component. An active unit of a right two-pole electromagnet is fixed on a right side surface of the stage moving component, while a stator unit of the right two-pole electromagnet is fixed on a left side surface of a right foundation frame. The stage moving component is fixedly mounted on a guide sleeve of an aerostatic guideway. Each of the stator units of the left and right two-pole electromagnets has an eddy current sensor and a hall sensor fixed therein.

An actuator includes a housing, a movable part, and an advancing unit that is at least temporarily connected to the movable part. The advancing unit includes a deformation unit and a deformer configured to deform the deformation unit with a vector component perpendicular to an effective direction of the actuator so that a total length of the deformation unit changes in the effective direction of the actuator as a result of the deformation. The movable part is configured to move in the effective direction of the actuator upon a removal of the vector component on the deformation unit and the deformation unit is disposed along the effective direction of the actuator upon the removal of the vector component on the deformation unit.

A posture adjustment device for an optical sensor includes: a controller, a posture detector, and a posture adjustment structure. An optical sensor to be detected is fixed on the posture adjustment structure. The posture detector receives an emitted beam of the optical sensor to be detected, detects a posture of the optical sensor to be detected according to the emitted beam, and sends posture information to the controller. The controller controls, according to the posture information, the posture adjustment structure to adjust the posture of the optical sensor to be detected.

An inchworm actuator particularly adapted to implementation of robotic muscles through loosening and tightening of tendon-like structures, including a piezoelectric stack which expands and contracts the actuator, and one or more paired sets of clamps which are engaged and disengaged by means of piezoelectric stacks. Some embodiments are IM2R, which manipulate non-looped tendons, and IM2B, which manipulate looped tendons in a ‘bridgelike’ structure.

A short-travel nanoscale motion stage and a method for measuring thermally-related hysteresis data are provided. A stator unit of a left two-pole electromagnet and stator units of two inchworm motors are fixed on a right side surface of a left foundation frame, and an active unit of the left two-pole electromagnet and actives of the two inchworm motors are fixed on a left side surface of a stage moving component. An active unit of a right two-pole electromagnet is fixed on a right side surface of the stage moving component, while a stator unit of the right two-pole electromagnet is fixed on a left side surface of a right foundation frame. The stage moving component is fixedly mounted on a guide sleeve of an aerostatic guideway. Each of the stator units of the left and right two-pole electromagnets has an eddy current sensor and a hall sensor fixed therein.

A linear or rotary step motor for moving an object comprising: one or more beam actuators; and one or more auxiliary actuators. Each beam actuator comprises: (a) a flexible beam; (b) two holders holding the flexible beam from the beam edges; and (c) an actuator for moving the said at least one holder in order to bent the beam toward the object or to pull the beam away from the object. The axillary actuators are connected to the one or more beam actuators. The beam actuators configured to grip or release the object, and the one or more beam actuators perform a movement step to the object by first grip the object by the one or more beam actuators then push the object by activating the auxiliary actuator.

An apparatus and a method of fabricating an apparatus for piercing an object, the apparatus comprises: a substrate; one or more needles; one or more anchors and one or more piezoelectric actuators. The method comprises the steps of deposit sacrificial layer over the substrate; deposit conducting layer over the sacrificial layer; deposit piezoelectric layer over the conducting layer; etch a geometry of the one or more piezoelectric actuators using a first mask created by lithography process; deposit the one or more needle and one or more anchors using a second mask created by lithography process and a lift-off process; etch the sacrificial layer under the needle and the one or more piezoelectric actuators, wherein the anchors are configured to connect the substrate to the piezoelectric actuators and the one or more piezoelectric actuators are configured to expand, contract or bend, and form holding arms that are configured to move the one or more needles.