A double-axis flexure hinges combined with elliptical and parabolic curve is presented in this paper. The design equations for its compliance computation have been deduced by application of Castigliano's displacement theorem after the anlysis of the structure, which were analyzed by the use of the software MATLAB, and comfirm the validity of the model with finite element analysis software ANSYS.
By using the theory and method of topology structure design of parallel robotic mechanisms, the degrees of freedom (DOF) is analyzed based on 4-DOF(3T1R) asymmetric parallel robots in this paper. Then, the inverse and forward kinematics of the manipulator are calculated through establishment of constrained equations with analytical approach.
For multi-attribute decision making problems, a new evaluation method for alternative selection using information axiom is proposed, of which the functional requirements are incomplete or unknown. Through identifying the type of each evaluation index and determining the probability of success satisfying the functional requirement of each index, the total information content for each alternative is obtained, and ranked in order, so the optimal alternative can be selected. For requirement of evaluation, the calculation formula of information content is amended. Further, this approach allows the decision-maker to amend design range according to the customer’s needs, so the satisfactory alternative with designer’s preference can be obtained and the evaluation process is placed into a more flexible and natural framework. Finally, an example is used to illustrate the proposed method.
Based on the reciprocal relationship of twist and wrench in screw theory, the mathematical model for limb of parallel manipulator is established in this paper. According to the motion modes of mobile platform (translation or rotation), we concluded the geometric conditions which the prismatic joint or revolute joint must meet with by analyzing the constraint screw on the platform, which provides the background for development of parallel mechanism.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.