Development and performance of a three degree of freedom large motion vibration isolation mount for the KC-135 aircraft

1993 ◽  
Author(s):  
B. TRYGGVASON ◽  
B. STEWART ◽  
S. SALCUDEAN ◽  
H. DAVIS ◽  
E. SLOOT
Keyword(s):  
Vibration Isolation ◽  
Degree Of Freedom ◽  
Large Motion ◽  
And Performance ◽  
Three Degree Of Freedom

Passage Through Resonance in a Vibration Isolation System (Effects of Rate of Increasing the Voltage Applied to D.C. Motor)

2007 ◽  
Author(s):  
Tomohiko Tange ◽  
Ryo Kawana ◽  
Tetsuro Tokoyoda ◽  
Masatsugu Yoshizawa ◽  
Toshihiko Sugiura
Keyword(s):  
Rigid Body ◽  
Internal Resonance ◽  
Vibration Isolation ◽  
Transient Behavior ◽  
Degree Of Freedom ◽  
Isolation System ◽  
Vibration Isolation System ◽  
Rotational Vibration ◽  
Three Degree Of Freedom ◽  
Driving Torque

This paper deals with transient nonlinear vibration of a rigid body suspended on a foundation by elastic springs and constrained in a plane. In such a three degree-of-freedom vibration isolation system, we assume that ‘2-1-1’ internal resonance exists between the vertical and horizontal vibrations of the rigid body and the rotational vibration about its center of gravity. Our main purpose is to examine theoretically the transient behavior passing through resonance under the condition that the D.C. motor directly drives the unbalanced rotor. Numerical simulation was carried out to clarify effects of rate of increasing V(t) on the peak amplitude of the vibration of the rigid body and on the driving torque of the D.C. motor. Moreover, experiment was conducted with a physical model of a three degree-of-freedom vibration isolation system, and the transient behavior passing through resonance was observed and compared with theoretical results in a typical case with internal resonance.

Multivariable Control Design for a Bilateral Telemanipulator

2003 ◽  
Author(s):  
Kevin B. Fite ◽  
Michael Goldfarb
Keyword(s):  
Impedance Control ◽  
Singular Values ◽  
Degree Of Freedom ◽  
Stability Robustness ◽  
Remote Environment ◽  
And Performance ◽  
The Stability ◽  
Three Degree Of Freedom ◽  
And Control ◽  
Control Methodology

This paper presents an architecture and control methodology for a multi-degree-of-freedom teleoperator system. The approach incorporates impedance control of the telemanipulator pair and formulates the system as a single feedback loop encompassing the human operator, telemanipulator, and remote environment. In so doing, multivariable Nyquist-like techniques are used to design compensation for enhanced stability robustness and performance. A measure of the transparency exhibited by the multivariable teleoperator system is attained using matrix singular values. The approach is experimentally demonstrated on a three degree-of-freedom scaled telemanipulator pair with a highly coupled environment. Using direct measurement of the power delivered to the operator to assess the system’s stability robustness, along with the proposed measure of multivariable transparency, the loop-shaping compensation is shown to improve the stability robustness by a factor of almost two and the transparency by more than a factor of five.

An LPV Approach to Obstacle-Sensitive Trajectory Regulation

2009 ◽  
Author(s):  
Mazen Farhood ◽  
Eric Feron
Keyword(s):  
Control Strategy ◽  
Design Parameter ◽  
Closed Loop ◽  
Degree Of Freedom ◽  
And Performance ◽  
Three Degree Of Freedom ◽  
Parameter Dependent ◽  
Strategy Changes ◽  
Loop Stability

The paper focuses on the control of vehicular systems along trajectories in the presence of obstacles. We design parameter-dependent controllers which guarantee closed-loop stability and performance of the vehicle’s regulation loop. In addition, the control strategy changes depending on the position of the vehicle in the obstacle environment so that the critical outputs are given the most attention. We also provide a fast and easy-to-implement algorithm for online controller construction. Last, the proposed approach is applied to a three-degree-of-freedom helicopter.

Passage Through Resonance in a Three Degree-of-Freedom Vibration Isolation System

2005 ◽  
Author(s):  
Ryo Kawana ◽  
Tetsuro Tokoyoda ◽  
Kazushige Sato ◽  
Masatsugu Yoshizawa ◽  
Toshihiko Sugiura
Keyword(s):  
Rigid Body ◽  
Vibration Isolation ◽  
Transient Behavior ◽  
Degree Of Freedom ◽  
Isolation System ◽  
Vibration Isolation System ◽  
Unbalanced Rotor ◽  
Rotational Vibration ◽  
Three Degree Of Freedom ◽  
Theoretical Results

This paper deals with transient nonlinear vibration of a rigid body suspended on a foundation by elastic springs and constrained in a plane. In such a three degree-of-freedom vibration isolation system, we assume that ‘2-1-1’ internal resonance exists between the vertical and horizontal vibrations of the rigid body and the rotational vibration about its center of gravity. Next, the vibration of the rigid body is captured into or passes through resonance when the rotation speed of an unbalanced rotor equipped with the rigid body is increased. We theoretically examined the transient behavior of passage through resonance under the condition that a DC motor directly drives the unbalanced rotor with a limited electric current. Moreover, the experiment was conducted with a physical model of such a system, and transient oscillations through resonance were observed and compared with theoretical results in a few cases of limited currents.

414 Design of a Control System for Three-Degree-of-Freedom Hybrid Vibration Isolation System

2007 ◽  
Vol 2007 (0) ◽  
pp. _414-1_-_414-6_ ◽  
Author(s):  
Shingo HASHIMOTO ◽  
Kazuki MIZUTANI ◽  
Ryojun IKEURA
Keyword(s):  
Control System ◽  
Vibration Isolation ◽  
Degree Of Freedom ◽  
Isolation System ◽  
Vibration Isolation System ◽  
Three Degree Of Freedom

201 Design for Three-Degree-of-Freedom Hybrid Vibration Isolation System

2005 ◽  
Vol 2005.54 (0) ◽  
pp. 23-24
Author(s):  
Keisuke ITO ◽  
Kazuki MIZUTANI ◽  
Manabu AJINO ◽  
Ryojun IKEURA
Keyword(s):  
Vibration Isolation ◽  
Degree Of Freedom ◽  
Isolation System ◽  
Vibration Isolation System ◽  
Three Degree Of Freedom

Six degree of freedom quasi-zero stiffness magnetic spring with active control: theoretical analysis of passive versus active stability for vibration isolation

2021 ◽  
pp. 116086
Author(s):  
Nur Afifah Kamaruzaman ◽  
William S.P. Robertson ◽  
Mergen H. Ghayesh ◽  
Benjamin S. Cazzolato ◽  
Anthony C. Zander
Keyword(s):  
Theoretical Analysis ◽  
Active Control ◽  
Vibration Isolation ◽  
Degree Of Freedom ◽  
Magnetic Spring ◽  
Six Degree Of Freedom
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