Soft actuators have been extensively deployed to trigger motions for multifunctional applications in recent years. It is of desire to optimize the driving method of soft actuators such that to obtain high accelerations. Here, we report a transient driving method (TDM) enabled by the combustion of mixed gases. Experiments are conducted on the hyperelastic silicon membranes exploded by the premixed oxygen and propane. Numerical and theoretical models are developed to investigate the kinematic response of the soft actuators with respect to the gas amount $A$ and gas volume fraction $r$ of the premixed gases, and satisfactory agreements are obtained between the experimental data, numerical results and theoretical predictions. An empirical model is also summarized for the applicability of the predictions. Optimal design is carried out to control and maximize the achievable driving peak using the transient driving method. An underwater soft jumper is developed by the soft actuator which can jump out of the water for 3 times body length on average and about 6 times body length at most, which showed obvious enhancement of the driving peak in comparison with the existing underwater combustion-driven soft robot. The reported TDM provides a promising powering technique for the applications of soft actuators in engineering.

近年来，软致动器已被广泛部署以触发多功能应用的运动。期望优化软致动器的驱动方法，以便获得高加速度。在这里，我们报告了一种通过混合气体燃烧实现的瞬态驱动方法（TDM）。对由预混合的氧气和丙烷爆炸的超弹性硅膜进行了实验。建立了数值和理论模型以研究软执行器相对于气体量的运动学响应$\mathrm{一种}$ 和气体体积分数 $\mathrm{[R}$的预混合气体，实验数据，数值结果和理论预测之间获得令人满意的协议。还总结了经验模型的预测的适用性。使用瞬态驱动方法进行了优化设计，以控制和最大化可达到的驱动峰值。该软致动器研制的水下软跳线可以跳出水中，平均跳水长度为人体的3倍，最多不超过机身的6倍，与现有的水下燃烧驱动相比，驱动峰明显增强软机器人。报道的TDM为软执行器在工程中的应用提供了一种有前途的动力技术。