Green Clamping Devices Based on Two-Step Orthogonal Toggle Force Amplifier Driven by Pneumatic Muscle

2010 ◽  
Vol 426-427 ◽  
pp. 413-416
Author(s):  
Guang Ju Si ◽  
Ming Di Wang ◽  
Kang Min Zhong
Keyword(s):  
Design Method ◽  
Mechanical Force ◽  
Compressed Air ◽  
Pneumatic Actuator ◽  
Pneumatic Cylinder ◽  
Creative Design ◽  
Pneumatic Muscle ◽  
Transmission Technique ◽  
Working Medium ◽  
Characteristic Features

As a new kind of flexible pneumatic actuator using clean compressed air as working medium, pneumatic muscle has many particular characteristics comparing with pneumatic cylinder. It can well accord with the development of green transmission technique. Combing pneumatic muscle with mechanical force amplifier is a practical and creative design method. According to this method, two kinds of green pneumatic clamping devices based on two-step orthogonal toggle force amplifier driven by pneumatic muscle are introduced. Their working principles and characteristic features are analyzed and corresponding mechanics calculating formulae are also given respectively.

scholarly journals Development and Analysis of Semi-Automatic Safety Inflation Bag

2019 ◽  
Vol 8 (2) ◽  
pp. 1092-1104 ◽  
Keyword(s):  
Spinal Cord ◽  
Compressed Air ◽  
Pneumatic Actuator ◽  
Pneumatic Cylinder ◽  
Air Channels ◽  
The Right ◽  
The Impact ◽  
Balloon Protection ◽  
Additional Safety ◽  
Critical Injury

Various safety gears and techniques are available in cars but save for the helmet, not much of safety gears have been introduced for the bike riders. Bike riders indulge in fatal accidents during their rides and race riders in spite of wearing the best safety gears get injured severely with spinal cord and chest being most vulnerable during the impact. Daily riders or race riders, accidents are inevitable. It’s entirely upon us to equip ourselves with an additional safety gear for our own safety purposes. The project, safety inflation bag, provides the best solution to prevent injuries to spinal cord and chest. Here, a pneumatic actuator is used to inflate the air channels sewn inside the bag which provides protection for chest and spinal cord. This technique is implemented in a bag, as bag is most commonly used during bike rides. Be it for office goers or for riders on long trips, bag is necessary and fixating the safety gear inside the bag serves the rider than just for carrying items. It could save the life. It could prevent him from enduring critical injury to spinal cord or chest. During the time of impact, the pneumatic cylinder goes off, releasing the compressed air through the air channels pressed against chest and spinal cord thus inflating them at the right time to provide a solid balloon protection. This project could serve as the first step to a major safety innovation for bike riders.

scholarly journals Energy Efficiency of Pneumatic Cylinder Control with Different Levels of Compressed Air Pressure and Clamping Cartridge

Energies ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3711
Author(s):  
Vladislav Blagojevic ◽  
Dragan Seslija ◽  
Slobodan Dudic ◽  
Sasa Randjelovic
Keyword(s):  
Energy Consumption ◽  
Air Pressure ◽  
Compressed Air ◽  
Pneumatic Cylinder ◽  
Final Position ◽  
Return Stroke ◽  
Cylinder Piston ◽  
Reduce Energy Consumption ◽  
The Cost ◽  
Different Levels

Since pneumatic systems are widely used in various branches of industry, the need to find ways to reduce energy consumption in these systems has become very pressing. The reduction in energy consumption in these systems is reflected in the reduction of compressed air consumption. The paper presents a cylinder control system with a piston rod on one side, in which the reduction in energy consumption is ensured by using different levels of supply pressure in the working and the return stroke, and by holding the cylinder piston rod in its final positions with a clamping cartridge. Clamping and holding the piston rod in its final position further affects the reduction in energy consumption. Experimental data show that the application of the proposed control leads to a decrease in compressed air consumption of 25.54% to 32.97%, depending on the compressed air pressure used in the return stroke. The cost-effectiveness of the proposed cylinder control with different levels of compressed air pressure and holding the final position by clamping cartridge is presented.

A Pneumatic Multi-Dome Active Energy Harvesting System

2016 ◽  
Author(s):  
Daniel Goodey ◽  
Austin Fidlar ◽  
Varuna Denawakage Don ◽  
Donnie Hudnell ◽  
Ronell Pemberton ◽  
...  
Keyword(s):  
Heavy Traffic ◽  
Compressed Air ◽  
Pneumatic Cylinder ◽  
The Road ◽  
Available Energy ◽  
Road Pavement ◽  
Physical Prototype ◽  
Simulation Testing ◽  
System Data ◽  
Toll Booth

When traveling through heavy traffic, vehicles lose a large amount of their kinetic energy. These losses can be attributed to various sources such as the roll friction of the tires against the road pavement. According to the Federal Highway Administration, there are an average of 304,000 cars a day travelling on the US-75 near the Dallas Fort Worth Arlington area in Texas. With so much available energy being wasted, it is essential to find a different way to harness losses so that they can be recycled. The purpose of this research project is to design a system that will harvest some of this lost energy using a set of pneumatic cylinders built into the road. The cylinders will have a dome shape that extends slightly above the surface of the road. As cars pass over this dome the cylinder will retract and compressed air will be sent through a pneumatic system, to an air tank where it is stored. The energy generated by the air stored in the cylinder can be used to drive a pneumatic motor that can turn a generator. The generator could then be used for multiple purposes such as: charge a battery, power a toll booth or other near highway structures. The compressed air stored in the tank may be used for other applications. This is useful due to the fact that almost every industry from the medical industry to the food industry use compressed air to power their pneumatic tools. The pneumatic cylinder will be used in areas of high traffic such as when a car approaches a toll booth, or entrances and exits of multi-level parking garages. The pneumatic cylinder and the associated air flow system using a CAD and a pneumatic software. The behavior of the system could then be tested and be better understood. After the initial simulation testing, a physical prototype has been built in order to gather practical data that can be compared to the simulations. Based on the gathered data on the prototype an assembly of numerous road rumbles can be built and tested on real streets. It is expected that a high pressure will be built in the tank using the prototype. Once pressure is built in the system data will be generated using various instruments, which will show pressure versus time, and pressure versus number of strokes so that the system can be better understood during the testing period. This data will then be used to determine the efficiency, and viability of the proposed system in generating compressed air as a form energy.

Robust Vibration/Force Control of a 2 D.O.F. Arm Having One Flexible Link with Artificial Pneumatic Actuators

2002 ◽  
Vol 8 (3) ◽  
pp. 405-423 ◽  
Author(s):  
No-Cheol Park ◽  
Hyung-Wug Park ◽  
Hyun Seok Yang ◽  
Young-Pil Park
Keyword(s):  
Force Control ◽  
Controller Design ◽  
Design Method ◽  
Strong Nonlinearity ◽  
Flexible Link ◽  
Muscle Type ◽  
Singular Perturbation Method ◽  
Actuator Dynamics ◽  
Pneumatic Muscle ◽  
Artificial Pneumatic Muscle

A flexible link of a manipulator has an advantage over a rigid link in the sense that, not only is it light-weighted and thus can move fast using a small-sized actuator, but also that it is safer when it comes into contact with its environment, in particular with humans. However, the vibration due to the flexibility of the link makes it difficult to control the position of the end-point with precision, and when the link is in contact with its environment the problem becomes further complicated. On the other hand, if an actuator can deliver enough force while maintaining proper compliance, it would be advantageous for the sake of safety. An artificial pneumatic muscle-type actuator is an adequate choice in this case. However, the dynamic characteristics of this particular actuator possess strong nonlinearity and load-dependency, and thus a number of problems need to be resolved for its successful application as an actuator. In this work, the position and force control problem of a two-d.o.f. arm system having a flexible second link with artificial pneumatic muscle-type actuators is addressed. A composite controller design method is proposed in the framework of the singular perturbation method. Various robust control schemes are designed in order to meet with payload variation, parameter uncertainty, unmodelled vibration mode and actuator dynamics, both in the slow and the fast subsystems. Simulations and experimental results confirm the effectiveness of the suggested composite control scheme.

Pneumatic cylinder with magnetorheological brake using serpentine and helix flux guide as a linear hybrid actuator for haptics

2016 ◽  
Vol 28 (10) ◽  
pp. 1303-1321 ◽  
Author(s):  
Max Cinq-Mars ◽  
Hakan Gurocak
Keyword(s):  
Power Efficiency ◽  
Position Control ◽  
Weight Ratio ◽  
Compressed Air ◽  
Pneumatic Cylinder ◽  
Shear Mode ◽  
Precise Position ◽  
Hybrid Actuator ◽  
Pneumatic Cylinders ◽  
Magnetorheological Brakes

This research explored a new linear hybrid actuator, which consists of a pneumatic cylinder with a magnetorheological brake embedded in its piston. Magnetorheological brakes are promising actuators since they can apply large forces in a small actuator size, but they can only oppose motion, as they are passive actuators. Pneumatic cylinders are desirable actuators due to their high force-to-weight ratio and ability to apply active forces. However, they require expensive servo valves for precise position control. The new hybrid actuator benefits from the advantages of magnetorheological brakes and pneumatic cylinders. It can apply forces using compressed air and can resist external forces using the magnetorheological brake. The embedded brake also eliminates the undesirable side effects of using compressed air and allows precise positioning of the piston anywhere in its stroke with simple solenoid valves. Fields such as haptics and robotics might benefit greatly from the use of the hybrid actuator where a high force-to-weight ratio could be employed. The study contributes (1) a triple helix flux guide for the linear magnetorheological brake, (2) serpentine flux path to enable larger braking forces, (3) shear mode activation, and (4) control algorithms that enable use of simple solenoid valves and improved power efficiency. When compared to an existing purely pneumatic control algorithm, the hybrid actuator exceeded the performance in position tracking and force disturbance rejection. A power management algorithm demonstrated that disabling the brake when the piston was in position vastly decreases the power consumption.

The Study on the Innovation Bicycle Design Using Functional Element Characteristics

2015 ◽  
Vol 764-765 ◽  
pp. 383-387
Author(s):  
Nien Te Liu ◽  
Chang Tzuoh Wu ◽  
Yung Chun Lin
Keyword(s):  
Design Method ◽  
Development Stage ◽  
Functional Element ◽  
Creative Design ◽  
Functional Elements ◽  
Design Elements ◽  
Symbol Table ◽  
Design Competition ◽  
Bicycle Design

The design method on bicycle’s functional elements proposed by this research is based on analysis on the winning work in the Global Bicycle Design Competition. Via analyzing its creative design on functional elements, our study is aimed to establish a creative design method on bicycle for designers to develop lots of creative ideas at the concept development stage. This research is divided into three stages, including analysis on bicycle’s creative design elements, construction of creative design method flow on bicycle’s functional elements, and case study on design prototype. For analysis on bicycle’s creative design elements, we have come up with a symbol table of bicycle’s creative functional elements (CFEs). As to construction of creative design method flow on bicycle’s functional elements, we first asked the designer to describe his/her design theme, and then picked bicycle’s CFEs according to the contents described. After CFEs were picked, we then conducted the space position arrangement of functional element symbols. Based on designer’s requirements, we produced several kinds of space arrangements on CFEs, and then we designed a new bicycle by referring to the symbol table of bicycle’s CFEs acquired. In the final step, we followed the flowchart of bicycle’s CFEs constructed by this research, and proceeded a case study prototype design.

scholarly journals Starting System and Safety Protection of Explosion-proof Diesel Engine for Coal Mine Based on Compressed Air

2021 ◽  
Vol 2108 (1) ◽  
pp. 012005
Author(s):  
Kun Zhu ◽  
Jiquan Liu ◽  
Zhiwei Yan ◽  
Lei Zhang
Keyword(s):  
Diesel Engine ◽  
Diesel Engines ◽  
Compressed Air ◽  
Operating Parameters ◽  
Performance Requirements ◽  
Working Medium ◽  
Safety Protection ◽  
Design Plan ◽  
Main Components ◽  
And Storage

Abstract The starting and safety protection system is an important part ofthe explosion-proof diesel engine, and there are malfunctions in the explosion-proof diesel engine, such as difficulty in starting and failure in protection. As a gas working medium, compressed air is safe, reliable, and advantageous in acquisition and storage. Therefore, analyzing the starting principle and safety protection requirements of explosion-proof diesel engines and studying the correlation between the two systems, a set of starting and safety protection systemsusing compressed air as the working medium is designed in this paper. Moreover, the performance requirements of the main components in the system are studied, analyzing and calculating the operating parameters in the system, so that the design plan can be optimized. The problems appearing instarting and safety protection of explosion-proof diesel engines are solved through this system.

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