In the hydraulic or pneumatic actuator, which uses pressurized fluids to generate motion and force. Spring-based piezoelectric actuators are also becoming more popular due to their ability to generate high-precision motion with very small electrical signals.

The main contribution of technical springs in actuators is their ability to provide controlled force generation and precise motion control. For example, in mechanical spring actuators, the spring stores potential energy when compressed or stretched and releases it when triggered by an external force. This stored energy can then be used to generate motion or perform work.

In hydraulic or pneumatic actuators, technical springs provide precise control over fluid flow rates through valves or other mechanisms. This allows for fine-tuned pressure and flow rate adjustments for accurate positioning or force generation.