Shanghai University

Chongqing University

Robert Boschgmbh

Lear Corporation

Siemens Healthcare Gmbh

Autodesk, Inc.

Yi Sun

Jun Luo

Yan Peng

Min Wang

Huayan Pu

Shaorong Xie

Jiheng Ding

Dong Zhang

Shunqi Zhang

Chaoqun Duan

Yang Liu

Jinglei Zhao

Qiang Wu

Zhi Gang Yang

Xuan Li

Kevin Zhang

Jia Lei Ma

Tina Shen

Wei Le

Shujin Yuan

Yuanyuan Liu

Xiao Bing Wang

Longteng Zhang

Wenchuan Jia

Xuan Fang

Jiyun Zhao

Qinghua Kong

Zong Li

Long Bai

Mu Lin

Chaoqun Xu

Leslie Scott Ruskin

Ben Lu

Zhi Han

Ling Zhi Zhao

Wenyuan He

Jianhui Zhong

Fu Guo Lu

Wenjiang Wu

Fan Mei

Peng Jiang

The present disclosure discloses a Stewart vibration isolation platform with Macro Fiber Composite (MFC) plates. The vibration isolation platform includes: an upper load platform, a lower foundation platform, a controller, and a plurality of single-leg vibration isolation unit groups arranged between the upper load platform and the lower foundation platform. Each of the single-leg vibration isolation unit groups includes two single-leg vibration isolation units. The single-leg vibration isolation unit includes a first diaphragm spring and a second diaphragm spring. An MFC actuator and an MFC sensor are respectively arranged on two sides of the first diaphragm spring and the second diaphragm spring. The MFC actuators and the MFC sensors are all connected to the controller.

Stewart vibration isolation platform with macro fiber composite plates and control method thereof

The present invention discloses a quasi-zero-stiffness (QZS) based six-degree-of-freedom (6-DOF) absolute displacement and attitude measurement device. A lower end coil and an upper end coil are respectively charged with currents in the opposite directions; The electromagnetic field and the magnetic fields of an upper magnet and a lower magnet per se are mutually acted to produce an electromagnetic stiffness opposite to the stiffness of a spring. The stiffness of the whole leg is close to zero stiffness. When the to-be-measured platform generates space motion, the reference platform is in the stationary state. At this point, the deformation amounts of the six legs can be measured by laser displacement sensors. The six deformation amounts are respectively inputted into the displacement and attitude resolver, and by forward kinematic solution of the 6-DOF device, the displacement and the attitude of the to-be-measured platform can be obtained.

Quasi-zero-stiffness based six-degree-of-freedom absolute displacement and attitude measurement device

A squeeze mode giant electrorheological fluid damper is disclosed. The squeeze mode giant electrorheological fluid damper comprises a support, a container and a connecting structure, wherein the support comprises a bottom plate, guide shafts and a top plate, the guide shaft is vertically fixed on the bottom plate, and the top plate is slidably arranged on the guide shaft; the container comprises a container body and two spiral spring pieces coaxially arranged in the container body, the container body is fixed on the bottom plate, the bottoms of the two spiral spring pieces are fixed to the bottom of the container, the two spiral spring pieces are not in contact with each other and are spaced by 180&#xb0;; the top of the connecting structure is fixedly connected with the top plate, and the bottom of the connecting structure is fixedly connected with the tops of the two spiral spring pieces.

Squeeze mode giant electrorheological fluid damper

A wheel-legged amphibious mobile robot with a variable attack angle, which belongs to the technical field of robot structure technology. The robot includes three parts: motion unit, body trunk and power unit. As a key structure, the motion unit mainly includes a moving mechanism, a wheel assembly, a telescopic mechanism and a transmission device. The robot drives the telescopic mechanism to reciprocate linearly through a gear and rack set, and pushes 'legs' to expand and retract, so as to realize a mutual switching between a wheeled mode and a gait mode. Under transmission of bevel gear set, the blades can rotate at any same angle at the same time, to change the attack angle and realize the steering. The robot provided by the present disclosure can effectively adapt to a complex and harsh amphibious environment, and meet a series of operation requirements such as rapid movement, obstacle climbing, underwater steering.

Wheel-legged amphibious mobile robot with variable attack angle

The present disclosure relates to a signal conditioning system for improving low-frequency measurement performance of an acceleration sensor. The signal conditioning system includes: a charge integration circuit, a high-pass filter circuit, a lead-lag network, an anti-aliasing filter circuit, and a gain adjustment circuit. An input terminal of the charge integration circuit is connected to the acceleration sensor, an output terminal of the charge integration circuit is connected to an input terminal of the high-pass filter circuit, an output terminal of the high-pass filter circuit is connected to an input terminal of the lead-lag network, an output terminal of the lead-lag network is connected to an input terminal of the anti-aliasing filter circuit, and an output terminal of the anti-aliasing filter circuit is connected to an input terminal of the gain adjustment circuit.

Signal conditioning system for improving low-frequency measurement performance of acceleration sensor

The present disclosure provides a single-degree-of-freedom (SDOF) magnetic damping shock absorber based on an eddy current effect, comprising a lower plate, a ring-shaped magnet a, a ring-shaped magnet b, an aluminum cylinder, a bottom copper sheet, a copper sheet, a top copper sheet, a bearing seat, a linear bearing, a bearing end cap, a load, a piston shaft, a stepped shaft, a fixed collar, a coil spring, a lower clamping shaft, and fixing screws. When the shock absorber is working, the ring-shaped magnet a keeps stationary at the lower end and the ring-shaped magnet b reciprocates in the vertical direction. Both magnets are arranged in a mutual attraction manner. Under the action of a time-varying electromagnetic field generated by the relative movement of the ring-shaped magnet b, the copper sheet arranged between the two ring-shaped magnets generates eddy current damping. The movement of the ring-shaped magnet b is inhibited.

Single-degree-of-freedom magnetic damping shock absorber based on eddy current effect

An electromagnetic-piezoelectric composite vibration control device based on a synchronized switch damping technology is provided. An upper guiding component is installed inside the upper rigid frame, a lower guiding component is installed inside a lower rigid component, a guide rod is nested inside the upper guiding component and the lower guiding component, an upper idler wheel mechanism and a lower idler wheel mechanism are fixedly sleeved on the guide rod and are positioned between the upper guiding component and the lower guiding component respectively, an electromagnetic mechanism is fixedly sleeved outside the guide rod, one end of each piezoelectric cantilever beam is fixed between the upper rigid frame and the lower rigid frame, the other end is arranged between the upper idler wheel mechanism and the lower idler wheel mechanism, and the piezoelectric cantilever beams and the electromagnetic mechanism are connected with a circuit system respectively.

Electromagnetic-piezoelectric composite vibration control device based on synchronized switch damping technology

Disclosed is a self-powered vibration damper based on piezoelectricity and a control method. The damper comprises a loading platform, an energy collecting mechanism, a curved leaf spring, a vibration control mechanism and a substrate all connected in sequence, the circuit system comprises a rectifier circuit, a DC-DC voltage conversion circuit, an energy storage circuit, a control circuit and a charging battery, a first piezoelectric stack is connected with the input end of the rectifier circuit, the output end of the rectifier circuit is connected with the input end of the DC-DC voltage conversion circuit, the output end of the DC-DC voltage conversion circuit is connected with the input ends of the energy storage circuit and the charging battery, the output end of the energy storage circuit is connected with the input end of the control circuit, the output end of the control circuit is connected with the second piezoelectric stack.

Self-powered vibration damper based on piezoelectricity and control method thereof

The present disclosure discloses a piezoelectric self-powered combination beam vibration damper and a control method thereof. An upper guiding component is installed inside an upper rigid frame, a lower guiding component is installed inside a lower rigid component, a guide rod is nested inside the upper guiding component and the lower guiding component, an upper elastic component is sleeved outside the upper idler wheel mechanism, a lower elastic component is sleeved outside the lower idler wheel mechanism, one end of each piezoelectric cantilever beam is fixed between the upper rigid frame and the lower rigid frame, the other end of each piezoelectric cantilever beam is arranged between the upper idler wheel mechanism and the lower idler wheel mechanism, at least one piezoelectric cantilever beam is connected with the input end of a circuit system, and other piezoelectric cantilever beams are connected with the output end of the circuit system.

Piezoelectric self-powered combination beam vibration damper and control method thereof

A magnetic resonance diffusion tensor imaging method and corresponding device. The method includes acquiring omnidirectionally sampled diffusion weighted images of a plurality of training samples; performing diffusion tensor model fitting and undersampling for the omnidirectionally sampled diffusion weighted images of each training sample to obtain an omnidirectionally sampled diffusion tensor image and an undersampled diffusion weighted image; training a deep learning network, with the omnidirectionally sampled diffusion tensor images of the plurality of training samples as training targets and the undersampled diffusion weighted images as training data; acquiring undersampled diffusion weighted images of a target object; and inputting the undersampled diffusion weighted images of target objects into the trained deep learning network to obtain the predicted omnidirectionally sampled diffusion tensor images of the target objects. Also, a fiber tracking method and corresponding device.

Magnetic resonance diffusion tensor imaging method and device, and fiber tracking method and device

One embodiment of the present invention sets forth a technique for connecting users based on a measure of correlation. The method involves receiving a first activity data element associated with a first user, where the first activity data element includes activity information related to a first software application, receiving a second activity data element associated with a second user, where the second activity data element includes activity information related to the first software application, and determining, via a processing unit, a measure of correlation between the first and second activity data elements. The method further involves determining, based on the measure of correlation between the first and second activity data elements, that a connection between the first user and the second user should be facilitated, and facilitating a connection between the first user and the second user.

Method and system for connecting users based on a measure of correlation

The present invention discloses a stiffness-adjustable electromagnetic spring. The spring includes a central shaft, an intermediate electromagnetic force control component, and two end electromagnetic force control components, where the two end electromagnetic force control components are located on both sides of the intermediate electromagnetic force control component, the two end electromagnetic force control components and the intermediate electromagnetic force control component are both sleeved on the central shaft, and the intermediate electromagnetic force control component is coaxial with the two end electromagnetic force control components. The stiffness of the electromagnetic spring can be controlled online and the nonlinearity can be adjusted. The spring disclosed in the present invention can generate adjustable negative stiffness to decrease the dynamic stiffness without reducing the static stiffness, thus break through the limitation of carrying capability of the spring on the vibration isolation performance, and has characteristics of compact structure, fast response, and easy control.

Stiffness-adjustable electromagnetic spring

An electromagnetic type quasi-zero stiffness absolute displacement sensor that includes an intermediate shaft, upper end cover, first sliding bearing arranged on the upper end cover, upper housing fixedly connected to the upper end cover, electromagnetic coil fastened onto an inner wall of the upper housing, spiral spring, spring support connected to a lower end of the spiral spring, force sensor fastened onto a lower end surface of the spring support, lower end cover fastened onto lower end surface of the force sensor, and a lower housing connected to the lower end cover; the intermediate shaft sequentially passes through, from top down, the first sliding bearing, upper end cover, and electromagnetic coil, and is connected to an upper end of the spiral spring; and the upper housing is provided therein with a ring permanent magnet that is nested on the intermediate shaft and is not in contact with the electromagnetic coil.

Electromagnetic type quasi-zero stiffness absolute displacement sensor

The present invention relates to driving apparatus for a brushless direct current motor, comprising: at least three half-bridge circuits, each having two switches connected in series and being configured to supply a voltage to a terminal of a rotor coil; a zero crossing detection module configured to detect whether the rotor coils experience BEMF zero crossing and provide a control module with an indication signal that indicates whether the rotor coils experience BEMF zero crossing, based on a type of the brushless direct current motor; and a control module configured to transmit to the zero crossing detection module information regarding the type of the brushless direct current motor, and generate and output, based on the indication signal, pulse width modulation signals to control the switches of the half-bridge circuits. The driving apparatus may drive a plurality of types of brushless direct current motors.

Brushless direct current motor and driving apparatus thereof

A rotary mechanism includes an upper seat pan, a lower seat pan and an arc slideway mechanism. The upper and lower seat pans are connected at their sides and can rotate relative to each other. A middle inner slide rail of the arc slideway mechanism, which has a long through-hole in its center and is fixed to the lower seat pan, is positioned between an upper supporting plate and a lower supporting plate, both of which have a long aperture in their respective centers. Fixed parts run through the long through-hole and the long apertures, and fix an upper outer slide rail and a lower outer slide rail. A locking mechanism having portions fixed to the upper seat pan and the lower seat pan, respectively, is arranged to cooperate with the arc slideway mechanism to limit relative rotation of the upper and lower seat pans.

Rotary mechanism of rotary seats

Growing community of inventors

Shanghai, China

Yi Sun