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In this paper, the characteristics of the kinetic reliability of space four-links mechanism are analyzed and the relationship between the kinetic accuracy and wear clearances in joints is explored, using Advanced First Order and Second Moment (AFOSM) method and Monte-Carlo Simulation (MCS). The Archard wear model is applied to analyze the increasing wear clearances in joints; and the function between...
As the main source of ship propulsion motor, reduce the vibration noise is of great significance for improving the acoustic stealth performance of ships. Establish motor feet vibration transfer path analysis model to determine the primary excitation source and transfer path; Hammering method is used to test the transfer function of the path, and collect the response of reference point and target point...
Diamond-like carbon (DLC) films which contain a mixture of sp2 and sp3 hybridizations are widely used as a protective layer against wear and corrosion in hard disk drives (HDDs) due to their outstanding mechanical and tribological properties such as high hardness, low friction coefficient and excellent chemical durability [1]. The typical thickness of DLC film in HDD is approximately 1-2nm. For such...
Nowadays, the hard disk drive (HDD) filling with helium have emerged to achieve highly stable magnetic recording. The bearing force in helium is different from that in air. This paper uses the three-dimensional (3D) direct simulation Monte Carlo (DSMC) method to investigate the bearing force over bit patterned media (BPM) in the filling gases of air and helium under different conditions, including...
Theoretically analysis, and an in-depth research was made carried out on the implementation of force decoupling control of hydraulic shaking table. Because controlled DOF is 6 and the platform has 8 exciters, the whole control system is statically indeterminate, and this layout would produce huge endogenetic force during operation, so a pressure stabilized controller is used to reduce the force. The...
A challenge for automating mechanical assembly is that cumulative uncertainties typically exceed part clearances, which makes conventional position-based tactics unsuccessful. Force-based assembly strategies offer a potential solution, although such methods are still poorly understood and can be difficult to program. In this paper, we describe a force-based robotic assembly approach that uses fixed...
The long term success of the robotics industry depends on the growth in non-automotive markets. This paper presents the recent efforts in developing force control enabled technologies for a new set of applications that include assembly, polishing, deburring and milling. For each process, a force control based solution was provided to address the specific problem inherent in that process, and verified...
This paper presents on-pendant assembly parameter optimization with an industrial robot with force control. ABB industrial robot and its latest controller IRC5 is used as the host platform of the development; design of experiment (DOE) method is used as an optimization tool; and automatic transmission torque converter assembly is used as a test case. All tasks such as data manipulation, data analysis,...
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