Certain high speed industrial assembly robots share a peculiar three legged parallel architecture wherein three “hips”, attached to a fixed upper base or “pelvis”, actuate “thighs” connected by “knees” to “shins”. Each shin is a parallelogramic four-bar linkage. “Ankles” are connected to a common end effector “foot” which executes spatial translatory motion. Inverse and direct kinematic analyse...

The rod presser foot and needle bar driving mechanism of the embroidery machine cannot achieve accurate parking time position at high speed, which limits development speed make quality decline. Aiming solving this bottleneck problem, characteristics based on analyzing kinematics is developed. These influences each linkage parameters are analyzed. Six main selected to optimize by using complex m...

In general, joints are assumed without clearance in the dynamic analysis of multi-body echanical systems. When joint clearance is considered, the mechanism obtains two uncontrollable degrees of freedom and hence the dynamic response considerably changes. The joints’ clearances are the main sources of vibrations and noise due to the impact of the coupling parts in the joints. Therefore, the syst...

This study attempted to establish an optimal design and perform dynamic analysis for a spring-actuated cam-linkage composite mechanism in rated 12 kV, 25 kA vacuum circuit breaker (VCB). The of the VCB involves two steps: first step stiffness closing springs cam profile, based on three-order polynomial motion curve follower; second four-bar linkage. To minimize surplus work operating mechanism,...

The current real-time detection of sowing depth has the problems low accuracy and poor reliability. After analyzing movement mechanism monomer parallel four-bar linkage, an improved adaptive Kalman filtering method for is proposed. uses two MPU6050 attitude sensors. difference between rotation angle linkage used as relative to monomer. characteristics up–down translation, changes can be obtaine...

Abstract. MEMS-Technology based microgrippers have been recently used in different fields of applications. These microsystems can be actuated by means electrostatic actuators, such as linear or rotary comb drives, but the robustness and feasibility components static well dynamic conditions still raises some concerns. In order to contribute fill this gap, properties a MEMS-Techology Based silico...

In this paper, we examine the modular development of two alternate methods for distributed computation of the forward dynamics simulations of constrained mechanical systems such as four-bar linkages. We exploit the natural spatial parallelism of closed-chain linkages, initially, for the modular development of overall dynamics and subsequently, for the distributed numerical simulation of the dyn...