Browsing by Author "Yang, YN"

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An elastic suspension design framework for tuned gyroscopes
(1997-03-01)
Yang, YN
;
Chieng, WH
;
機械工程學系
;
Department of Mechanical Engineering
This paper presents a design for a new tuned gyroscope framework consisting of a heavy rotor supported by a heli-flex suspension. Inherently free of 2 omega drift-error the gyro can be precisely tuned by adjusting pre-extension between two ends of its helix. The symmetrical support structure of this isotropic helical suspension design significantly reduces error moment caused by linear acceleration, and the device eliminates G(2) drift by virtue of its desirable anisoelasticity characteristic. The gyro design is simple, highly manufacturable, and when appropriate suspension parameters are used, produces a long-term drift-rate of 0.01 deg./hr.
An elastic suspension design framework for tuned gyroscopes
(1997-03-01)
Yang, YN
;
Chieng, WH
;
交大名義發表
;
機械工程學系
;
National Chiao Tung University
This paper presents a design for a new tuned gyroscope framework consisting of a heavy rotor supported by a heli-flex suspension. Inherently free of 2 omega drift-error the gyro can be precisely tuned by adjusting pre-extension between two ends of its helix. The symmetrical support structure of this isotropic helical suspension design significantly reduces error moment caused by linear acceleration, and the device eliminates G(2) drift by virtue of its desirable anisoelasticity characteristic. The gyro design is simple, highly manufacturable, and when appropriate suspension parameters are used, produces a long-term drift-rate of 0.01 deg./hr.
The joint displacement method for multiloop kinematic analysis
(1995-12-01)
Yang, YN
;
Chieng, WH
;
Lee, AC
;
交大名義發表
;
機械工程學系
We present a kinematic formulation, referred to as the joint displacement method. In the kinematic analysis; the closed-loop kinematic chain of interest must be transformed into several open-loop chains by imagining that some joints are relaxed (disconnected), and by replacing them as physical entities with a set of constraint equations. This formulation requires only a minimal number of generalized coordinates, hence it provides;a highly efficient approach for real-time kinematic analysis of spatial mechanisms, heretofore unseen in the literature. For-example, the Jacobian matrix for the RSCR mechanism is 3 x 3 and the CPU time required to perform Gauss elimination is 182 times shorter than that in the traditional link-coordinate method which requires a 17 x 17 Jacobian matrix. This method is applicable to both single loop and multiloop spatial mechanisms with revolute, cylindrical, translational, spherical and universal joints. A general-purpose computer program that implements the joint displacement method has been developed and tested on a variety of mechanisms.