39results about How to "Achieve continuous motion" patented technology

The invention relates to an apparatus having at least one tubular piezo element for the electromechanical positioning of a rotor on the inside of the piezo element. Said apparatus is characterized by at least one elastic friction means for applying a normal force onto the rotor, said friction means being connected to the piezo element. A method for controlling the apparatus is disclosed.

The invention discloses a satellite thrust eccentric moment control device and method. The device comprises: a base plate, a controller, a mass block, a driving unit in a first direction, a driving unit in a second direction, and an angular velocity measurement unit; a controller, a mass block, and a mass block. The first-direction driving unit and the second-direction driving unit are arranged on the bottom plate, and the mass moves in the first direction and / or the second direction driven by the first-direction driving unit and / or the second-direction driving unit. The angular velocity measurement unit is used to measure the angular velocity parameters of the satellite and send the angular velocity parameters to the controller; the controller is used to control the action of the first direction drive unit and / or the second direction drive unit according to the angular velocity parameters. The satellite thrust eccentric moment control device and method of the present invention change the position of the center of mass by driving the mass block to move, so that the thrust vector moment passes through the center of mass, eliminates the eccentric moment, and reduces the influence of the propulsion system on the attitude of the satellite. The algorithm structure is simple, and the controller has high reliability.

The invention discloses a sensor-carrying device for plane guided wave online detection of the defects of a base plate of a vertical-type metal storage tank, which relates to the technical fields of supersonic wave measurement and pipeline systems. The sensor-carrying device comprises an outer frame, a support mechanism, an adsorption mechanism, a movement mechanism, a dismounting mechanism and a sensor fixing mechanism. The support mechanism and the sensor fixing mechanism are fixed at the lower part of the outer frame. The adsorption mechanism, the movement mechanism and the dismounting mechanism are fixed in the outer frame. The support mechanism, the adsorption mechanism and the movement mechanism allows the sensor-carrying device to be balancedly supported on an outer edge plate of the storage tank and to move along the outer edge plate. In detection, the sensor-carrying device is arranged on the outer edge plate (2) of the storage tank and is adsorbed on a storage tank wall plate (3). The sensor-carrying device provided by the invention enables continuous movement of a sensor to be realized, provides the pressure for tightly pressing the sensor on the outer edge plate and improves detection efficiency.

The invention discloses a two-state variable stiffness compliant joint and an operation method thereof. The joint is composed of an input shaft, an output outer ring and a stiffness adjustment mechanism. The input shaft is placed at the center of rotation of the output outer ring and is firmly connected to the input disc; two elastic reeds are installed between the input disc and the output outer ring, one end of each elastic reed is connected to the output outer ring through a bearing, and the other end is connected to the output outer ring. The small bevel gear shaft is fixedly connected, and the small bevel gear shaft is connected to the input plate through bearings; the stiffness adjustment mechanism is fixedly connected to the large bevel gear through the stiffness adjustment motor; the large bevel gear is connected to two small bevel gears that are fixedly connected to the elastic reed engage. The invention has good impact resistance and flexible dynamic characteristics, belongs to active variable stiffness compliant joints, and can be used for joints and drivers of various robots such as bionics, service and rehabilitation.

The invention belongs to the field of coaxial reflecting telescope regulating mechanisms and particularly relates to a six-degree-of-freedom secondary mirror regulating mechanism based on stacked piezoelectric blocks. The mechanism comprises a bottom plate, regulating units and a top platform used for carrying a secondary mirror, wherein the regulating units are arranged between the bottom plate and the top platform. The mechanism is characterized in that each regulating unit comprises a first combined flexible hinge, a lever amplifying device, a fixed frame, straight beam type flexible hinges, one stacked piezoelectric block and a second combined flexible hinge, wherein one end of the first combined flexible hinge is connected with the top platform, and the other end of the first combined flexible hinge is connected with the lever amplifying device; the lever amplifying device is connected with the fixed frame through the straight beam type flexible hinges; the stacked piezoelectric block is fixedly mounted in the fixed frame; one end of the second combined flexible hinge is connected with the fixed frame, and the other end of the second combined flexible hinge is connected with the bottom plate. By the adoption of the mechanism, the purposes of high-precision positioning of the secondary mirror and quick and active vibration isolation can be achieved.