Abstract
In this study, a novel multiphase converged control structure with a switching mechanism is established based on the fundamentals of the fast-terminal sliding mode. This control structure achieves an excellent performance in a nonlinear dynamic system, and its primary objective is to control the piston trajectory in an innovative electrohydraulic, pneumatic, and mechanical hybrid system. This work focuses on abrupt gain-scheduled acceleration, which has been rarely studied in the literature but has increasingly diverse high-technology applications across various industries. The greatest challenge lies in the sensitivity and instability of the system during a sudden actuator acceleration. Moreover, the system parameter uncertainties and external disturbances strongly influence the degree of control of the system. By inheriting the robustness and fast convergence properties of sliding-mode algorithms, the proposed control law not only guarantees a finite-time convergence of tracking errors to their origin but also reduces the impact of composite disturbances in an extremely rapid experimental process. The effectiveness of the proposed structure is analyzed via numerical simulations and industrial implementation.
Highlights
High-precision gain-scheduled acceleration is used by various industries in crash simulations [1], safety tests [2], absorbance system design [3], deconstruction machines, and dummy tests [4]
Remark 1: This study presents a relatively new problem and approach in actuator control
This study focuses on the sudden acceleration-tracking control of an actuator
Summary
High-precision gain-scheduled acceleration is used by various industries in crash simulations [1], safety tests [2], absorbance system design [3], deconstruction machines, and dummy tests [4]. These working conditions require a platform that can absorb the reaction force of external loads while maintaining high energy output and precision For this platform, a hybrid electro-hydraulic and pneumatic actuator (HEHPA) is designed as an innovative combination of hydraulic and pneumatic technologies. Fluctuations in temperature and an of pneumatic and hydraulic systems and its corresponding increase in abrasion between piston and brake-pad surfaces mathematical model that can achieve the required control significantly alter the friction coefficient, thereby changing quality. The major mechanical element of this essential This robust property is an inherent system is a pneumatic cylinder fixed with an external mass characteristic of sliding mode algorithms and FTSMC [29] (M) and a hydraulic brake (9). An offset level that exceeds the desired hydraulic pressure inside the brake chamber, thereby enhancing control quality especially in cases with high-peak reference acceleration
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have