Linear pneumatic motors – a comparative study

Deaconescu, Tudor; Deaconescu, Andrea

doi:10.1051/matecconf/201711205007

Cited by 1 publication

(2 citation statements)

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“…The equations resulted from the information included in the technical specifications of the pneumatic muscles. m DMSP_10 (l) = 0.094 × l + 0.077 (6) m DMSP_20 (l) = 0.178 × l + 0.238 (7) m DMSP_40 (l) = 0.34 × l + 0.675 (8) It is known that upon being fed compressed air, the pneumatic muscle contracts by up to 20% of its initial length. The maximum stroke carried out by the free end of the muscle is described by Equation ( 9):…”

Section: Establishing the Dependency Of The Actuators Mass On The Len...mentioning

confidence: 99%

“…The growing use of compressed air in the construction of powered exoskeletons is determined by its benefits, such as easy generation and storage, non-flammability, minimum risk of explosion, minimal maintenance requirements of the pneumatic systems, compliance, etc. By their generated motion, pneumatic motors are linear or rotary, and, as to their construction, they are equipped with a piston, blades or membrane [8]. The literature reveals the predominant deployment of pneumatic cylinders and pneumatic muscles in the construction of powered exoskeletons.…”

Section: Introductionmentioning

confidence: 99%

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Energy-to-Mass Ratio—A Novel Selection Criterion of Pneumatic Motors Used for the Actuation of Wearable Assistive Devices

Deaconescu

2022

Applied Sciences

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The requirements to be met by a wearable assistive device are compactness, lightweight and energy efficiency. While the literature discusses the construction and performance of such devices, no information is provided as to the criteria to be applied in selecting such an actuator, capable of satisfying the mentioned conditions. Ensuring the high autonomy of a wearable assistive device requires actuators that can store a large quantity of energy in a small as possible volume, for example, actuators with a high energy density. This paper presents a comparative study of the performance of two types of pneumatic actuators: single-acting cylinders and pneumatic muscles, respectively, and offers information that will enable users to select an optimum solution. The quality indicators considered in conducting the comparative study are size, mass, the developed force and the energy-to-mass ratio. A method is proposed to determine the energy developed by the motors over the entire stroke; based on that, the energy-to-mass ratio is subsequently calculated. This indicator is a valuable tool made available to designers of wearable assistive devices. The conclusion yielded by the study asserts that while pneumatic muscles have larger radial and axial dimensions, they present benefits as to the developed forces and the energy-to-mass ratios.

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Section: Establishing the Dependency Of The Actuators Mass On The Len...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%