30results about How to "Improve time lag" patented technology

The invention discloses a semi-active magnetic-current variable-piezoelectric feedback type damper, comprising an inner tube and an outer tube. A revolving shaft is arranged in the middle of the innertube, and is fixedly connected with two vanes which are arranged by the angle of 180 degrees in the inner tube. The vanes are hollow and provided with mass blocks inside respectively, the upper and lower ends of each mass block are connected with the inner wall of the corresponding vane through springs. Two thin plates are arranged in the inner tubes and perpendicular to the vanes respectively. The cavity of the inner tube is filled with magnetorheological fluid. Piezoelectric generator units are respectively arranged on the surfaces of the thin plates, and pressure sensors are respectively arranged at the tops of the piezoelectric generator units. The outer wall of the inner tube is wound with a field coil along the axis direction. The pressure sensors, the field coil, a controller and an electric power extracting and storing unit are in series connection to form a closed loop, wherein the controller and the electric power extracting and storing unit are arranged at the top of the inner tube.

A thin film photovoltaic panel and a method for making same including providing a photovoltaic layer on a substrate having at least one edge; a sealant is applied in a liquid form by a pump on a planar surface of the substrate; an adhesive layer is applied between the first substrate and the second substrate, wherein the first adhesive layer is disposed between the photovoltaic layer and at least one of the first and second substrate; and the first and second are secured together to form the thin film photovoltaic panel. The sealant layer includes a desiccant material having a concentration of less than about 20 weight %, which increases the diffusion time lag time for the sealant to reach steady state, thereby extending the duration of the thin film photovoltaic panel.

The invention discloses an energy-feed composite anti-galloping energy dissipation spacer comprising a body, wherein a cavity is formed inside the body; an excitation coil is mounted on the inner sideof the body; a metal clamp is arranged on the outer side of the body; a first insulating layer is arranged between the excitation coil and the body for insulation; a ring barrel filled with a magnetorheological fluid is arranged in the inner ring of the excitation coil; a metal ball which can roll in the ring barrel is arranged in the ring barrel; a plurality of piezoelectric generating units areinstalled at intervals on the inner ring of the ring barrel along the circumferential direction; pressure sensors is disposed at the two ends of each piezoelectric generating unit; the piezoelectricgenerating unit is connected in series with an electric energy extraction and storage unit, a controller and the excitation coil to form a closed loop; the inner ring of each piezoelectric generatingunit is provided with a second insulating layer; and an electromagnetic particle vibration absorption body is disposed on the inner side of the second insulating layer.

The invention discloses a self-powered type magneto-rheological damping device which comprises an outer barrel, wherein two inner barrels are fixed in the outer barrel, and the insides of the inner barrels are hollow to form damping cavities; a ball screw pair is arranged between the inner barrel, rigid rods are respectively connected to the two ends of the ball screw pair, and the two rigid rodspenetrate through the damping cavities to be connected with an inner wall of the outer barrel; a plurality of blades are fixedly arranged on the parts, in the damping cavities, of the rigid rods, theinner barrels are filled with magneto-rheological fluid, and the outsides of the inner barrels are wound by electrified coils; a movable device connected with the ball screw pair is arranged under theball screw pair, a mass block is arranged in the movable device, steel plates are arranged at the two sides of the mass block, magnets are arranged on a lateral wall of the movable device, and the steel plates are located among adjacent magnets; rotors are in interference fixed connection to the peripheries of the rigid rods, and each rotor is composed of a permanent magnet and a rotor magnet yoke; a stator core is arranged at the periphery of each rotor, a stator winding is arranged on each stator core, a stator shell is fixedly connected to the outside of each stator, and the stator shellsfixedly contact outer walls of the inner barrels.

The invention discloses an active suspension preview control method based on camera sensor pavement recognition. The method comprises the following steps: acquiring front pavement preview informationthrough a camera sensor; performing data processing on the front road surface preview information to obtain a front road surface unevenness value, and determining a road surface unevenness grade according to an unevenness division criterion; receiving a front road surface unevenness grade instruction, and establishing an active suspension model based on front road surface preview information; designing a multi-performance index constrained active suspension H-infinity optimal controller; and obtaining a weight value in the H-infinity optimal controller by using a multi-objective constraint optimization algorithm so as to realize performance balance of various performance indexes of the suspension. According to the method, the camera sensor is used for obtaining the road surface preview information, the H-infinity optimal control is combined, the time lag phenomenon in the active suspension damping parameter adjusting process is improved, and multi-performance index balance control overthe active suspension is achieved.

The invention discloses a semi-active magneto-rheological tuned mass damper. The semi-active magneto-rheological tuned mass damper comprises a barrel body; a connection block is arranged in a bottom plate of the barrel body; and a working cylinder is fixed to the connection block. Separation plates are arranged in the working cylinder, and the working cylinder is divided into a center cavity, damping cavities and side cavities. The center cavity is internally provided with a mass block capable of horizontally moving in the axis direction of the axis of the working cylinder. The center of the mass block is provided with a groove and a rolling bearing, and the periphery of the mass block is connected with piston rods capable of sliding along the rolling bearing. The damping cavities are internally provided with pistons, and the pistons are fixedly connected to the piston rods. The piston rods penetrate through holes reserved in the partition plates, extend into the side cavities and areconnected with one ends of springs in the side cavities. The other ends of the springs are fixedly connected into the working cylinder. The damping cavities are filled with magneto-rheological fluid,and powered-on coils are wound around the damping cavities. The powered-on coils are connected with an induction control device inside the barrel body.

The invention discloses a self-adaptive suspension liquid mass double-tuned damper for offshore wind turbine vibration control. The self-adaptive suspension liquid mass double-tuned damper comprises at least one set of self-adaptive hybrid frequency modulation translation control system, a self-adaptive active variable damping torsional vibration control system and a control system which are arranged at the maximum amplitude of a vibration mode controlled in a wind turbine tower, wherein each self-adaptive hybrid frequency modulation translation control system comprises a first-stage frequencymodulation translation control unit and a second-stage frequency modulation translation control unit, the self-adaptive active variable damping torsional vibration control system comprises a rotary torsional vibration control unit and a variable-damping control unit, and the control system is used for collecting the real-time vibration state of the wind turbine tower and controlling the first-stage frequency modulation translation control units, the second-stage frequency modulation translation control units, the rotary torsional vibration control unit and the variable damping control unit. The self-adaptive suspension liquid mass double-tuned damper comprises the self-adaptive hybrid frequency modulation translation control system and the self-adaptive active variable damping torsional vibration control system which are used for controlling translation motion and torsional motion of the offshore wind turbine under the coupling action of wind, waves and flow.

The invention discloses an automatic correction system free of machine head adjustment for a full-automatic cable production line, and belongs to the technical field of dedicated equipment for cable manufacturing. The system comprises automatic correction subsystems free of machine head adjustment, and each subsystem comprises a detection unit, a feedback unit, a control unit, and an execution mechanism. An eccentric screw is driven by a servo motor to automatically adjust the position of a die sleeve, thereby achieving the real-time adjustment of the insulating thickness in the whole production process. The system remains in a working state in the whole production process, guarantees the consistency of products, and further reduces the manual cost and machining cost while greatly improving the quality.

The invention discloses a universal semi-active magnetorheological damping device. The universal semi-active magnetorheological damping device comprises an inner cylinder, an outer cylinder and a rotary disc and is characterized in that the inner cylinder is fixed onto the rotary disc, and the inner cylinder can rotate in optional directions under the effect of the rotary disc; the rotary disc isconnected with an induction control device; a connecting block is arranged inside an inner cylinder bottom plate, and a working cylinder is fixed on the connecting block; partitions are arranged inside the working cylinder to separate the interior of the working cylinder into a central cavity and damping cavities; a mass block which can horizontally move along the axis direction of the working cylinder is arranged in the central cavity; the mass block is fixedly connected with a piston rod which can axially move along the working cavity; a piston is arranged inside each damping cavity, and thepiston rod penetrates through holes reserved in the partitions and extends into the damping cavities to be fixedly connected with the pistons; shape memory alloy springs sleeve the piston rod locatedin the working cavity, one end of each spring is fixedly connected to the mass block, and the other end of each spring is fixed to the corresponding partition; each damping cavity is filled with magnetorheological fluid, an energizing coil wind the outside of each damping cavity, and the energizing coils are connected with the induction control device.

The invention discloses a self-powered rotary shaft vibration active control system and an active control method. In the self-powered rotary shaft vibration active control system, an inner housing isfixedly connected with a rotary shaft; a first end cover can be rotatably connected to the inner housing; a second end cover can be rotatably connected to the inner housing; the outer housing is fixedly connected to the first end cover and the second end cover; a permanent magnet is fixedly connected with the outer housing; a coil rack is fixedly mounted on the inner housing; a magnet exciting coil is wound on the coil rack, and generates relative motion with a permanent magnet to generate electric energy; an accelerated speed sensor is fixedly connected to the rotary shaft to measure a vibration signal of the rotary shaft in real time; an elastic element is fixedly connected to the rotary shaft; an actuator is fixedly connected to the elastic element, so that applied acting force acts onthe rotary shaft through the elastic element; the controller is electrically connected to the magnet exciting coil and the accelerated speed sensor; by responding to the vibration signal, the controller analyzes and processes the vibration signal to form a control signal; and by responding to the control signal, the actuator applies acting force on the rotary shaft through the elastic element to actively control radial vibration of the rotary shaft.

An image display control apparatus includes an image data supply section that supplies an image composed of a plurality of pixels arranged two-dimensionally in a matrix form as captured image data, a mask data supply section that supplies mask data for masking the image data, an imaging instruction accepting section that validates an imaging instruction acceptance signal when accepting an operation input corresponding to an imaging instruction, and a drawing section that sequentially draws the respective pixels, each having a pixel value, in the image data every predetermined period. When detecting that the imaging instruction acceptance signal is valid, the drawing section draws the pixels such that each pixel has a value including the mask data as the pixel value after the detection.

The invention provides an analog storage battery direct-current power supply, which comprises a power supply converter, a main loop current detection device, a feed load controller and a feed load. The feed load controller regulates the feed load according to feedback voltage and comprises a signal amplification circuit, a signal processing circuit and a signal output drive circuit which are connected in turn; the signal amplification circuit is used for shaping and amplifying a signal output by the main loop current detection device; the signal processing circuit consists of a plurality of light beam drivers which are connected in series; and the output port of each light beam driver is connected with the feed load through the signal output drive circuit. A hardware drive electronic load system improved by an analog storage battery is controlled by hardware, has reaction speed higher than that of the system controlled by software, and effectively improves time lag caused by feedback in software control, so the response speed of an electronic load is increased, the requirement on the work capacity of switching devices such as an insulated gate bipolar transistor (IGBT) and the like is reduced, and the service life of equipment is prolonged.