Patent
Monte Carlo technique based geometrical tolerance distribution method for large high-speed rotary equipment
TLDR
In this paper, a Monte Carlo technique based geometrical tolerance distribution method for large high-speed rotary equipment is presented, which consists of analyzing a propagation process of positioning and orientation tolerances of radial and axial measurement planes.Abstract:
The present invention provides a Monte Carlo technique based geometrical tolerance distribution method for large high-speed rotary equipment, and belongs to mechanical tolerance distribution technology. The method comprises: analyzing a propagation process of positioning and orientation tolerances of radial and axial measurement planes of large high-speed rotary equipment; determining a propagation relationship of center coordinates after n-level equipment assembly; obtaining relationships between equipment eccentricity and positioning and orientation tolerances and rotation angles of rotors of each level after the assembly; creating radial eccentricity and axial perpendicularity data of the large high-speed rotary equipment of each level according to a Monte Carlo method; drawing a distribution function to solve a probability density function; and obtaining a probability relationship between radial eccentricity and an axial perpendicularity tolerance of the large high-speed rotary equipment of each level and a final coaxiality tolerance of the multi-level equipment, thereby implementing tolerance distribution of the large high-speed rotary equipment.read more
Citations
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References
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Journal ArticleDOI
A matrix approach to the representation of tolerance zones and clearances
Alain Desrochers,Alain Rivière +1 more
TL;DR: In this article, a matrix approach coupled with the notion of constraints for the representation of tolerance zones within CAD/CAM (computer-aided design and manufacture) systems is presented.
Journal ArticleDOI
Research on giant magnetostrictive micro-displacement actuator with self-adaptive control algorithm
Lei Wang,Jiubin Tan,Y T Liu +2 more
TL;DR: In this paper, the output strain of a giant magnetostrictive micro-displacement actuator is used for feedback to control system, and the control system adopted self-adaptive control algorithm, the ideal input and output model of actuator was used for a reference model and a hysteresis transfer function for the actuator real model.
Patent
Measuring and adjusting process-considered tolerance design method of precise machine tool
TL;DR: In this paper, a measuring and adjusting process-considered tolerance design method of a precise machine tool, which comprises the steps of: firstly defining a related coordination system according to a key feature plane; then determining a state space equation and a basic coefficient matrix thereof of a machine tool assembly; next, establishing a cost target function, obtaining an optimal adjustment sequence by a discrete system output regulator so as to convert the statespace equation into a Gauss-Markov random process equation, and performing iteration computation to obtain the covariance matrix after integral assembly is finished.
Patent
Machine radial stack gap generation and clearance management system and method
Dave Dischinger,Charles P. Silcox,Amitabh Tandon,Muralidharan Kendai,Karthikeswaran K. Kalusivalingam +4 more
TL;DR: In this paper, a system and method for readily generating radial clearance data for a radial clearance between locations on at least two parts in a rotating machine includes rendering an image of a cross section view of at least a portion of the machine on a display.