scholarly journals Research on the Vibration Characteristics of the New Type of Passive Super Static Vibratory Platform Based on the Multiobjective Parameter Optimization

2015 ◽  
Vol 6 (0) ◽  
pp. 569289-569289 ◽  
Author(s):  
J. E ◽  
C. Qian ◽  
T. Liu ◽  
G. Liu
Keyword(s):  
Parameter Optimization ◽  
Vibration Characteristics ◽  
New Type

Dynamics Analysis and Parameter Optimization of New Vibration Platform

2014 ◽  
Vol 1061-1062 ◽  
pp. 771-775
Author(s):  
Yan Bin Liu ◽  
Chen Xu Yin ◽  
Jia Jia Ma
Keyword(s):  
Frequency Response ◽  
Parameter Optimization ◽  
Prototype Model ◽  
Flexible Body ◽  
Dynamics Analysis ◽  
Frequency Model ◽  
Body Model ◽  
New Type ◽  
Simulation Results ◽  
The Stability

A new type of vibration platform was presented and its dynamic characteristics was studied in this paper, A virtual prototype model of vibration platform was built by using software Soldworks and ADAMS.The flexible body model of spring was built based on ADAMS flexible module,rigid-flexible coupled dynamic of vibration platform were analyzed by using simulation, the natural frequency, model of vibration and frequency response were further analyzed. The stiffness of spring and flexible cable were optimized according to the analysis results, The post-optimality simulation results show that the stability and frequency response of vibration platform have improved.

Multi-Objective Technologic Parameter Optimization of Face Milling Based on GRA-PSO Algorithm

2013 ◽  
Vol 364 ◽  
pp. 504-508 ◽  
Author(s):  
Dong Hong Tang ◽  
Yue Han
Keyword(s):  
Parameter Optimization ◽  
Preferential Flow ◽  
Pso Algorithm ◽  
Steering System ◽  
Face Milling ◽  
Corner Detection ◽  
Steering Angle ◽  
Wheel Loader ◽  
Steer By Wire ◽  
New Type

The development and characteristics of Steer-By-Wire is introduced and the design of Steer-By-Wire in articulated wheel loader is fully discussed in this paper. The whole system takes advantage of proportional decompression valve to control the motion of preferential flow amplifier valve, and further to achieve steering by controlling steering cylinder. Whats more, this paper has also elaborated on a design of new-type steering angle detection devices of vehicle frame, which aims at more accurate corner detection and is also a breakthrough in steering system of wheel loader.

scholarly journals Efficiency Optimization Design of L-LLC Resonant Bidirectional DC-DC Converter

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3123
Author(s):  
Jing Lu ◽  
Xiangqian Tong ◽  
Jianwu Zeng ◽  
Ming Shen ◽  
Jun Yin
Keyword(s):  
Parameter Optimization ◽  
Optimization Design ◽  
High Efficiency ◽  
Design Method ◽  
Optimization Method ◽  
Switching Loss ◽  
Intrinsic Mechanism ◽  
Parasitic Parameters ◽  
New Type ◽  
Parameter Optimization Design

The new type of L-LLC resonant bidirectional DC-DC converter (L-LLC-BDC) has merits of high efficiency, high-power density and wide gain and power ranges, and it is suitable for energy interface between energy storage systems and DC micro grid. However, the resonances are sensitive to the parasitic parameters, which will deteriorate the efficiency. This paper investigates the intrinsic mechanism of parasitic parameters on the L-LLC-BDC operating principle and working characteristics based on the analysis of working modes and resonance tank. By taking the oscillation of parasitic parameters produced in the stage for the freewheeling stage into consideration, a parameter optimization method is proposed to reduce the resonant current oscillation while maintaining the characteristic of the natural soft switching. The experiment results not only validated the proposed parameter optimization design method, but also testified to the improvement of the efficiency through the minimization of the conduction and switching loss.

scholarly journals Study on the performance of a new type of bobbin silk reeling machine

2021 ◽  
Vol 16 ◽  
pp. 155892502110591
Author(s):  
Hailin Luo ◽  
Yaqin Fu ◽  
Zhaoxin Li ◽  
Md Zahidul Islam
Keyword(s):  
Parameter Optimization ◽  
Process Parameters ◽  
Tension Control ◽  
Control Technology ◽  
Optimal Process ◽  
Molecular Group ◽  
Orthogonal Analysis ◽  
New Type ◽  
Group Characteristics ◽  
Better Than

This study mainly investigated the performance and process parameter optimization of a new type of bobbin silk reeling machine by using orthogonal analysis designs. This new type of bobbin silk reeling machine with advanced winding and tension control technology was built through the transformation of a traditional automatic reeling machine. Experimental results indicated that a reeling speed of 130 m/min, an overfeeding ratio of 1.15, and a drying temperature of 90°C were the optimal process parameters. The molecular group characteristics, crystal structures, breaking strengths, and breaking elongation rates of the raw silk from homemade silk slices on bobbins prepared by this machine were similar to those from silk slices on small reels prepared by automatic silk reeling machines and traditional silk slices on bobbins prepared by winders. The softness of the raw silk from homemade silk slices on bobbins was similar to that from traditional silk slices on bobbins, and the cohesion performance of the raw silk from homemade silk slices on bobbins was better than that from traditional silk slices on bobbins. The raw silk from homemade silk slices on bobbins prepared by this machine is directly suitable for postweaving processing. This study can provide a practical basis for the development of the raw silk reeling technique on bobbins.

Study on Nonlinear Vibration Characteristics of Damping-Adjustable Hydro-Pneumatic Suspension

2010 ◽  
Vol 108-111 ◽  
pp. 1027-1032
Author(s):  
Bao Zhan Lü ◽  
Hong Xia Fu ◽  
Si Hong Zhu
Keyword(s):  
Nonlinear Vibration ◽  
Nonlinear Dynamic ◽  
Dynamic Stiffness ◽  
Vibration Characteristics ◽  
Damping Force ◽  
Output Force ◽  
Pneumatic Suspension ◽  
New Type ◽  
Working Principle ◽  
Set Up

Based on the investigation on vibration characteristics of certain off-road vehicle, a new type of damping-adjustable hydro-pneumatic suspension was put forward. After the analysis of its working principle, the nonlinear dynamic mathematical models of this suspension were set up. Using the method of theoretical calculation and simulation by MATLAB/Simulink, the nonlinear vibration characteristics of this damping- adjustable hydro-pneumatic suspension were studied, including static and dynamic stiffness, dynamic output force and damping force.

Outer Mesh and "Two Teeth Difference" Planetary Gear Transmission Parameter Optimization Design

2011 ◽  
Vol 308-310 ◽  
pp. 2237-2240
Author(s):  
You Dong Ye ◽  
Wen Xiang Zhang
Keyword(s):  
Parameter Optimization ◽  
Optimization Design ◽  
Planetary Gear ◽  
Working Life ◽  
Gear Transmission ◽  
Transmission Parameter ◽  
New Type ◽  
Parameter Optimization Design

Based on the structure and failure features of a new type of outer mesh and “two teeth difference” planetary gear transmission, a optimize method for the gear’s parameters is pointed out avoid of structure failure. The modification coefficients of the gear pairs are obtained through optimization design, so the sliding coefficient for the driving gear, driven gear and planetary gear tending to be equal. The relative slide between gears is reduced, and the working life of the structure is increased greatly.

scholarly journals Modeling and analysis of the vibration characteristics of a new type of in-arm hydropneumatic suspension of a tracked vehicle

2016 ◽  
Vol 18 (7) ◽  
pp. 4627-4646
Author(s):  
Zhifeng Liu ◽  
Congbin Yang ◽  
Xiaodong Gao ◽  
Ligang Cai ◽  
Qiang Cheng ◽  
...  
Keyword(s):  
Vibration Characteristics ◽  
Tracked Vehicle ◽  
Modeling And Analysis ◽  
New Type

scholarly journals A Novel Single-Loop Mechanism and the Associated Cylindrical Deployable Mechanisms

Symmetry ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1255
Author(s):  
Long Huang ◽  
Bei Liu ◽  
Lairong Yin ◽  
Jinhang Wang
Keyword(s):  
Parameter Optimization ◽  
Screw Theory ◽  
Motion Pattern ◽  
Geometrical Analysis ◽  
Interference Condition ◽  
Single Loop ◽  
Linear Pattern ◽  
Circular Pattern ◽  
New Type

This paper presents a new type of 2-DOF single-loop mechanism inspired by the Sarrus mechanism, and it utilizes this mechanism to construct 2-DOF cylindrical deployable mechanisms. First, the motion pattern of the single-loop mechanism is analyzed utilizing screw theory. According to the structural symmetries, the cylindrical deployable mechanisms are constructed through the linear pattern combination and circular pattern combination of the single-loop mechanisms. After the geometrical analysis and interference condition analysis, the axial, circumferential and area magnification ratios are defined and, furthermore, applied to the parameter optimization of the deployable mechanisms, forming an example surface. Finally, a simplified 1-DOF single-loop mechanism is derived from the proposed 2-DOF mechanism, which is used to construct 1-DOF cylindrical deployable mechanisms with singular free workspaces.

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