Beijing Rossum Robot Technology Co., Ltd

Beijing Jiaotong University

Gang Zhu

Wei Tian

Kewen Mu

Ke Xu

Bo Ai

Zhangdui Zhong

Chuan Bai

Xiangrui Zhao

Xingzhong An

An elastic traction system, including a driving mechanism to provide traction power, a connecting rod connected to an output shaft of the driving mechanism and rotating along with the output shaft, a traction wheel arranged at an end of the connecting rod for rotating along with the connecting rod, a traction wire connected to the traction wheel, and an elastic traction bow connected to the traction wire. An elastic body is arranged at a front end of the traction wire to be connected to various traction tools, the other end of the traction wire is wound around the traction wheel, and the traction wheel is driven by the traction system to rotate, so as to complete a traction operation. The elastic traction bow implements elastic traction of a fracture reduction surgery, provides an elastic activity space for a surgical operation, and greatly facilitates carrying out various reduction operations during traction.

Elastic traction system

The present invention relates to a robotic arm, including: an upper arm and a front arm; a first joint structure, by which the upper arm and the front arm are articulated together; a second joint structure, arranged at an end of the upper arm and/or an end of the front arm; a first driving mechanism, arranged in the upper arm; and a second driving mechanism, arranged in the front arm, where the first joint structure includes a first force amplification apparatus and a first locking element, the second joint structure includes a second force amplification apparatus and a second locking element, and the first driving mechanism and the second driving mechanism apply an acting force to the first locking element and/or the second locking element by the first force amplification apparatus and/or the second force amplification apparatus. According to the robotic arm in the present invention, the force amplification apparatuses are arranged in the joint structures, which amplifies a locking force and enables the robotic arm to meet the requirements for large load applications under a miniature condition.

Robotic arm

A power amplifying device with linear corrector utilizing the polynomial format to realize pre-distortion is disclosed. Its effective order estimation technique for polynomial based pre-distorter includes the following steps. Firstly, it receives the polynomial of the described pre-distorter and then, the polynomial is transformed into the matrix expression, obtaining the pre-distorter consisted of K pre-distortion functions, where K denotes the maximum order of the described polynomials. Secondly, singular value decomposition is performed for the pre-distortion matrix, obtaining singular value matrix. Thirdly, on the basis of the singular value matrix, effective rank of the pre-distortion matrix is obtained. Such effective rank of the pre-distortion matrix is determined as the effective order of the polynomial. This invention improves not only the pre-distortion performance but also lower the computational complexity of the power amplifier pre-distorter based on polynomials, which further guarantees the convergence speed and the stability of power amplifier pre-distorter based on polynomials.

Power amplifying device with linear corrector

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Beijing, China

Gang Zhu