Controlling Chaotic Motion of a Mechanical System with a Set-Up Elastic Stop

1997 ◽  
pp. 151-158
Author(s):  
H. Y. Hu
Keyword(s):  
Mechanical System ◽  
Chaotic Motion ◽  
Set Up

Dynamics of a Nonlinear Mechanical Resonator in Micro-Electro-Mechanical Systems

2001 ◽  
Author(s):  
Albert C. J. Luo ◽  
F. Y. Wang
Keyword(s):  
Mechanical System ◽  
Natural Frequency ◽  
Chaotic Motion ◽  
Alternating Current ◽  
Micro Electro Mechanical System ◽  
Voltage Amplitude ◽  
Mechanical Resonator ◽  
Chaotic Motions ◽  
Micro Electro Mechanical Systems ◽  
Nonlinear Mechanical

Abstract Equilibrium, natural frequency and responses of a mechanical resonator with capacitors in a simplified micro-electro-mechanical system (MEMS) are determined. Under application of alternating current (AC) voltage, the resonant conditions for such a system are obtained. The chaotic motions in the vicinity of a specified resonant-separatrix are investigated analytically and numerically. For a given AC voltage amplitude, the AC frequency bands are obtained for chaotic motion in the specific resonant layers and resonant motions, and such chaotic motions can be sensed very easily by the output transducer in MEMS.

Applied Research on Optimum Design of Planetary Reducer

2012 ◽  
Vol 184-185 ◽  
pp. 66-69
Author(s):  
You Jun Zhang ◽  
Chen Chang Zhang ◽  
Li Han ◽  
Jie Wang
Keyword(s):  
Objective Function ◽  
Mechanical System ◽  
Optimum Design ◽  
System Performance ◽  
Applied Research ◽  
Complex Method ◽  
Research Results ◽  
Main Target ◽  
Set Up ◽  
Optimum Solution

Reliability optimum design of the mechanical system is studied thoroughly based on the existing research results. Taking the 2K-H planetary reducer of PCP system as the physical mode, the main target of optimization is module, breadth of tooth and number of teeth. The objective function for obtaining a smaller gearbox volume is set up and the requirement of reliability is taken into account. The optimum solution is obtained by the complex method. The result is in conformity with the requirement and it indicates that the synthesis effect is satisfied. The reduction of volume is beneficial to improve PCP system performance.

Nonlinear Behavior of Pedestal Looseness Fault Rotor-Bearing System with Slowly Varying Mass

2010 ◽  
Vol 29-32 ◽  
pp. 2096-2101
Author(s):  
Yue Gang Luo ◽  
Song He Zhang ◽  
Bin Wu ◽  
Bang Chun Wen
Keyword(s):  
Fault Diagnosis ◽  
Dynamic Model ◽  
Chaotic Motion ◽  
Nonlinear Behavior ◽  
Speed Increase ◽  
Rotating Speed ◽  
Rotor Bearing ◽  
Set Up ◽  
Varying Mass ◽  
Bearing System

The dynamic model of the pedestal looseness fault rotor-bearing system with slowly varying mass was set up. The complex characteristics of the rotor-bearing system were numerically studied. Along with the increase of the looseness mass, the chaotic motion area and amplitude range increase in the region of critical rotating speed; and P-3 motion area disappears in the region of twice-critical rotating speed, chaos is the main motion form. Along with the increase of the coefficient of mass slowly varying amplitude, the instable rotating speed increase, and the chaotic motion area decreases, P-n motion area increases in the region of critical rotating speed and twice-critical rotating speed. The conclusions may provide basis reference for fault diagnosis.

Dynamics of a Rolling Wheelset

1993 ◽  
Vol 46 (7) ◽  
pp. 438-444 ◽  
Author(s):  
Hans True
Keyword(s):  
Mathematical Model ◽  
Equilibrium Point ◽  
Chaotic Motion ◽  
Dynamical Behavior ◽  
Railway Track ◽  
Kinematics And Dynamics ◽  
Bifurcation Diagrams ◽  
Speed Range ◽  
Set Up ◽  
The Mathematical Model

We discuss the kinematics and dynamics of a wheelset rolling on a railway track. The mathematical model of a suspended wheelset rolling with constant speed on a straight track is set up and its dynamics is investigated numerically. The results are presented mainly on bifurcation diagrams. Several kinds of dynamical behavior is identified within the investigated speed range. We find a stationary equilibrium point at low speeds and at higher speeds symmetric and asymmetric oscillations are found and ranges with chaotic motion are identified. The bifurcations are described.

scholarly journals The Use of Photoelectric Cells for Measuring the Static Duration of Combustion in Cigarettes/Anwendung von Photoleitern zur Bestimmung der statischen Branddauer von Cigaretten

1965 ◽  
Vol 3 (4) ◽  
Author(s):  
A. Lubrano ◽  
N. Carugno
Keyword(s):  
Mechanical System ◽  
Maximum Response ◽  
Automatic Assembly ◽  
Lighting System ◽  
Simultaneous Control ◽  
Set Up

AbstractThe semi-automatic assembly presented here (photoelectric cells used to measure the static duration of combustion in cigarettes) resembles in principle the design published by Wiley and Holmes. Essentially it consists of an electrical start-stop device timed by 2 signals activated by the movement of the glowing zone through a thermo-transductor field. It differs from the earlier design in that, instead of a hot bi-metallic thermocoupling, it uses a photo-transistor very selective in IR (maximum response 1.55 mµ, with a 50 % drop for 0.8 and none for 2 mµ). The device also has a mechanical system for holding the cigarette and positioning the phototransistors, and an electrical cigarette lighting system. The apparatus is set up for simultaneous control of 5 cigarettes.

The Design of Emergency Rescue Equipment for Agricultural Motor-Pumped Wells

2014 ◽  
Vol 488-489 ◽  
pp. 1104-1107
Author(s):  
Kai Bao Wang ◽  
Wen Kai Ma ◽  
Xian Ge Meng ◽  
Rui Feng Wang ◽  
Xing Fu Wang
Keyword(s):  
Mechanical System ◽  
Optimization Design ◽  
Simulation Analysis ◽  
Design Method ◽  
Dynamics Analysis ◽  
Small Space ◽  
Emergency Rescue ◽  
Combined Action ◽  
Set Up ◽  
Negotiation Mechanism

A wide variety of motor-pumped wells were used in agricultural in our daily life. Considering the service situation, the motor-pumped well was exposed to the air usually. With the condition, the falling accidents of underage children are reported frequently. It is extremely complicated to rescue the children trapped in the narrow and small space. The emergency rescue equipment based on optimization design method and dynamics analysis is introduced in the paper. This Motor-pumped well Rescue Equipment with the carrying platform can be controlled by the flexible rope to adapt to different rescue site. With the protection of umbrella support structure, the equipment completes combined action by dragging the manipulator; the equipment has been set up scalable obstacle negotiation mechanism so that it can adapt to the Motor-pumped well larger than 350 mm in diameter. In the research, the virtual prototype technology was used to simulate the kinematics and dynamics characteristics of the mechanical system. The feasibility of the design scheme of mechanical system was proved with the simulation analysis results. The equipment has advantages of the structure is compact, safe and reliable, easy to use. The research of the emergency rescue equipment for agricultural motor-pumped wells can be regarded as the reference of the related research.

A versatile scattering set-up in use for many-particle correlation experiments at the Hamburg isochronous cyclotron Part I: Mechanical system

1980 ◽  
Vol 169 (1) ◽  
pp. 129-137 ◽  
Author(s):  
H. Brückmann ◽  
U. Berghaus ◽  
H. Dreyer ◽  
P. Lara ◽  
H.P. Meyer-Rassow ◽  
...  
Keyword(s):  
Mechanical System ◽  
Isochronous Cyclotron ◽  
Particle Correlation ◽  
Set Up

Automatic Virtual Entity Simulation of the Symbolic Schemes Generated in Conceptual Design Processes

2009 ◽  
Author(s):  
Yu-Xin Wang ◽  
Yu-Tong Li
Keyword(s):  
Mechanical System ◽  
Conceptual Design ◽  
Lead Time ◽  
Unit Cost ◽  
Competitive Advantages ◽  
Object Based ◽  
Feature Based ◽  
Space Layout ◽  
Set Up ◽  
The Cost

The developing new products of high quality, low unit cost, and shortening lead time to markets are the key elements required for enterprises to obtain competitive advantages. In order to improve the creativity and shorten lead time to markets, a methodology of automatic virtual entity simulation of conceptual design results is proposed. At the end of conceptual design, the conceptual design results are expressed in the symbolic schemes generated by the computerized approach with a higher capability to obtain the innovative conceptual design. Then, the symbolic scheme is identified into basic mechanisms and their connections. To the identified basic mechanisms, their kinematic analysis is carried out by matching basic Barranov trusses, and their virtual entities are modeled based on feature-based technique and encapsulated as one design object. Based on the structures of the basic mechanisms and their connections, a space layout to the mechanical system corresponding to the symbolic scheme is fulfilled then. With the pre-assembly approach, all parts in the mechanical system are put onto proper positions where the constraint equations are met. In this way, the virtual entity assembly model of the mechanical system corresponding to the symbolic scheme is set up. Changing the positions of the driving links continually, the virtual entity simulation of the mechanical system will be fulfilled. As a result, with the aid of this approach, we can not only obtain innovative conceptual design results with excellent performances, but also shorten the design time and the cost of product developments.

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