Multi-actuated mechanism design considering structure flexibility using correlated performance reinforcing

Abstract

Multi-actuated rigid-flexible dynamic system exists widely in precision machinery and electrical control fields. The performances, such as kinematic, dynamic, electrical, magnetic, and thermal performances, are correlated and difficult to trap precisely. Therefore, a multi-actuated mechanism design method considering structure flexibility using correlated performance reinforcing is put forward. A system containing flexible subparts with multi degrees of freedom (DOF) with physical coordinate is converted into modal coordinate using 'DOF×modal order' square matrix. The structure flexibility is described by modal superposition of the shape mode which is considered as additional generalized coordinates. A dynamic equation with large DOF is formulated and reduced based on Craig-Bampton modal truncation. Using analogical design methodology with and without structure flexibility of the low voltage circuit breaker (LVCB), the extent of the performance impact of each subpart is obtained by calculating correlated Holm force, Lorentz force, electrodynamic repulsion force, electromagnetic force, and cantilevered bimetallic strip force. Design of experiments method is employed to reveal the hard-measuring properties using correlated relatively easy-measuring parameters. The trip mechanism is validated by an electrical performance experiment. results show that the structure flexibility can decrease the tripping velocity, which is non-negligible, especially for high frequency tripping. The method provides a reference significance for similar multi-actuated mechanism design.

Modal-Decomposition-Dependent State-Space Modeling and Modal Analysis of a Rigid-Flexible, Coupled, Multifreedom Motion System: Theory and Experiment

“…A motion system is the motion mechanism in a servo mechanism, and motion control technology is used to achieve precise positioning or motion control. It is widely used in robotics [1,2], computer numerical control machine tools [3], and other fields [4][5][6], and it is the core subsystem in precision and ultraprecision high-end equipment [7]. e requirements for motion systems include high resolution, high precision, stability, fast response times, high bandwidth, and robustness.…”

Interruption performance design of variable freedom mechanism triggered by electro-mechanical-magnetic coupling

“…For variable freedom mechanism, the interruption performance means the capability which makes the kinematic pairs change status between contact and non-contact. Based on our previous work, [15][16][17] an interruption performance design method of variable freedom mechanism triggered by electro-mechanical-magnetic coupling is put forward and verified by experiments.…”