Image matching is widely used in machine vision, computer technology, industry and agriculture and other fields. Matching the characteristics of traditional methods such as SIFT has advantages of compressed informatio...
详细信息
ISBN:
(纸本)9781479970063
Image matching is widely used in machine vision, computer technology, industry and agriculture and other fields. Matching the characteristics of traditional methods such as SIFT has advantages of compressed information quantity, high precision, but there are also some deficiencies such as the large of calculation, long time, the object to be measured of position should be required accurately and etc. This paper presents image matching method based on improved SURF feature, and the analysis and comparison are made for the three kinds of image matching methods. The experiment proved: Sometimes it can also be A single SIFT or SURF, The improved SURF more can meet the requirements of parameter estimation accuracy and real-time. It can carry out accurate judgment, recognition for the digital image. It has certain theoretical value and practical value.
Two types of 3-CRU translational parallel manipulators (TPM) are compared and investigated in this paper. The two 3-CRU TPMs have identical kinematics, but some differences exist in terms of the chain arrangement, one...
详细信息
ISBN:
(纸本)9781479973989
Two types of 3-CRU translational parallel manipulators (TPM) are compared and investigated in this paper. The two 3-CRU TPMs have identical kinematics, but some differences exist in terms of the chain arrangement, one is in fully symmetrical chain arrangement, called symmetrical 3-CRU TPM, the other one is in asymmetrical chain arrangement, called asymmetrical 3-CRU TPM. This paper focuses on discussing the differences between the two 3-CRU TPMs in kinematics, workspace and performance. This study provides insights into parallel manipulators with identical kinematics arranged differently.
In this paper, a new compliant parallel mechanism driven by piezoelectric actuators is designed, which is a modified structure from our previous designed stage. In order to compensate the limited stroke of PZT, the se...
详细信息
ISBN:
(纸本)9781479973989
In this paper, a new compliant parallel mechanism driven by piezoelectric actuators is designed, which is a modified structure from our previous designed stage. In order to compensate the limited stroke of PZT, the secondary amplification mechanism was adopted in this design, and also the matrix method is utilized to calculate its stiffness and compliance for this compliant mechanism. In practical application, the accuracy of mechanism is an essential index that we wish to achieve, meanwhile the parasitic motion analysis, dynamic and static analysis are also presented in this paper. The method is validated by finite element analysis to demonstrate its effectiveness.
A spatial 2-RPU&SPR parallel manipulator (PM) with three degrees of freedom (DOF) is proposed in this paper. The architecture of the manipulator is comprised of a moving platform attached to a base through two rev...
详细信息
ISBN:
(纸本)9781479952007
A spatial 2-RPU&SPR parallel manipulator (PM) with three degrees of freedom (DOF) is proposed in this paper. The architecture of the manipulator is comprised of a moving platform attached to a base through two revolute-prismatic-universal jointed serial linkages and one spherical-prismatic-revolute jointed serial linkage. The prismatic motions of the prismatic joints are considered to be actively actuated. The moving platform of the manipulator has one-translational and two rotational (1T2R) DOFs with respect to the fixed base. The kinematics including forward and inverse position analysis is analyzed. At last, the simulations of position and velocity of the manipulator are made to validate the algorithm.
暂无评论