english 
Abstract
This article synthesizes advancements in pneumatic servo actuator technology, focusing on control algorithms, experimental validation, and industrial applications. Key themes include friction compensation, adaptive learning frameworks, and hybrid control systems to address nonlinear dynamics and hysteresis challenges.
1. Control Strategies for Pneumatic Servo Actuators
- Generalized Maxwell-Slip Friction Model: A multiple-surface sliding mode controller (MSSMC) effectively addresses hysteresis and presliding friction in servo-pneumatic actuators, achieving sub-millimeter positioning accuracy by modeling velocity-dependent friction forces.
- Learning Posicast Control: Adaptive control frameworks leverage iterative learning to refine trajectory tracking, reducing phase lag and overshoot in cyclic operations. This method enhances force control in automation systems.
- Extended State Observer (ESO)-Based Pressure Control: ESO algorithms improve disturbance rejection by estimating unmodeled dynamics (e.g., air compressibility and valve nonlinearities), enabling precise chamber pressure regulation.
- Fuzzy Self-Adaptive Cascade Control: Combining fuzzy logic with cascade control structures optimizes servo-pneumatic position tracking under variable loads, demonstrating superior adaptability compared to traditional PID methods.
2. Experimental Validation and Performance Optimization
- Jet Pipe-Controlled Actuator Analysis: Dynamic modeling of jet pipe hysteresis and saturation effects reveals bandwidth limitations in high-frequency force tracking, guiding design modifications for improved transient response.
- Hybrid Shape Memory Alloy (SMA)-Pneumatic Actuators: Integrating SMA wires with pneumatic sleeves enhances motion range and force output, validated through cyclic loading tests with passive knitted/wrapped configurations.
- Closed-Loop Soft Gripper Systems: Pneumatic servo actuators achieve rapid grasping responses (<200 ms) in soft robotic grippers using embedded pressure sensors and flow-proportional valves, ensuring precise force modulation.
3. Applications in Industrial and Robotic Systems
- High-Precision Automation: Servo-pneumatic systems with ISO 1 Isotron valves (1000 Nl/min flow rates) enable accurate positioning of heavy-duty rodless cylinders (e.g., 2000 mm stroke length) in manufacturing lines.
- Medical and Collaborative Robotics: Low-inertia actuators with fuzzy adaptive control minimize energy consumption while maintaining safety in human-robot interaction scenarios.
Conclusion
Recent innovations in friction-aware control, learning-based adaptation, and hybrid actuator designs have significantly advanced pneumatic servo actuator performance. Future research should prioritize IoT integration for real-time health monitoring and standardization of adaptive control frameworks across industrial platforms.
If you want to learn more about low-priced products, please visit the following website: www.xm-valveactuator.com
