A proportion-integration-differentiation (PID) controller is a generic control loop feedback mechanism widely used in multi-channel aircraft structural fatigue test. The PID parameter is obtained by test setup method in which PID is tuned after the test setup is actually performed, so that the tuning period becomes overlong. And the dynamic characteristic of mechanical and hydraulic equipment i...

A hydraulic lifting-moving-rail equipment test bench is designed, which can lift and move the rail for examining and repairing. The loading system is an electric-hydraulic servo control system. The original control strategy has some disadvantages, such as overshoot and slow response, which severely effect dynamic performance and test precision of system. According to the fuzzy control theory, t...

This work presents an expert system prototype that integrates concepts from Design Methodology, Artificial Intelligence, Object-Oriented Modeling and Hydraulic System Design, developed as a research project using CLIPS, the project had intensive validation by industrial and academic experts. The development applied INTERNET technologies for knowledge harvesting and user interface. The paper dis...

[Abstract] An automated E/H steering controller is essential for autonomous off-road equipment. This paper presents a methodology for designing the E/H steering controller through a combination of testing and simulation. The steering kinematic model provides the steering linkage gain between the hydraulic actuator and the front wheel. The model makes it possible to close the steering control lo...

This abstract provides an overview of the experimental work carried out at the MARHIS network formed by the Barcelona and the Santander research laboratories. The emphasis is on the role played by extremes as hydraulic drivers and also in terms of the observed responses. This has implications for the experimental generation equipment (waves, currents, wind) and for the observed responses (morph...

Feet–ground interactions influence the legged robot’s stability. In this paper, a high-resolution indirect force measurement for hydraulic-legged robots is presented. The use of pressure transducers placed at one or both chambers of the robot’s double-effect hydraulic actuators is investigated, and conclusions are drawn regarding their capability for indirectly measuring the contact forces betw...