HADEC - High-Response Artificial Muscle Actuator Using Dimethyl Ether Combustion

This letter introduces a high-response artificial muscle actuator using dimethyl ether combustion (HADEC), which is a novel method to enhance the responsiveness and force output of pneumatic actuators. The HADEC system integrates a McKibben-type artificial muscle filled with a combustible mixture of dimethyl ether (DME) and air, and it is ignited to generate rapid fluid pressure through combustion. This approach achieves force, displacement, and response speeds comparable to those of biological muscles while maintaining the simplicity and low-cost structure of McKibben-type actuators. The system provides instantaneous force generation without the need for complex mechanisms such as latches or brakes. DME, which is an environment- friendly fuel, ensures minimal emissions. Experimental results validate the effectiveness of HADEC in improving responsiveness, and the findings suggest superior force generation, faster response times, and high-frequency operability compared to that of conventional pneumatic actuators. Further, the paper discusses the potential for repeated actuation and highlights the benefits of HADEC in various robotic applications that require rapid and significant force.