Control Techniques for Electrohydraulic Actuators in Aerospace, Civil and Robotics Engineering
A special issue of Actuators (ISSN 2076-0825).
Deadline for manuscript submissions: closed (31 December 2020) | Viewed by 6254
Special Issue Editor
Interests: mechanohydraulic, electrohydraulic, and electromechanical actuators; active and semi-active control; antiblocking systems (ABS); smart aerospace structures; structural health monitoring (SHM); stability robustness and performance robustness—analysis and synthesis; linear and nonlinear control synthesis: LQG control; backstepping control; sliding mode control; geometric control; adaptive control synthesis; intelligent control synthesis: neural control; fuzzy control; systems with delay; switching systems; Liapunov stability; critical stability
Special Issue Information
Dear Colleagues
After World War II, the use of electrohydraulic actuators (EHAs) spread significantly and they became the right choice for a variety of areas, including civil engineering, machine tools, mobile equipment and robots, radar antenna, land vehicles, naval and aerospace systems, and missile launchers. EHS is in fact a position tracking system, but EHA as a stabilizing system can be viewed as a special case of the tracking system. An eloquent example of practical interest for EHA as a stabilizing system is the well-known problem of altitude-hold autopilot synthesis, involving an EHA, where the target is the maintenance of the desired altitude of the aircraft, thus allowing the pilot to perform other more important tasks.
Therefore, the study of stabilization and tracking problems for EHAs remains attractive and important. EHAs do not only allow the generation of large forces but, thanks to modern control technology and sensors, are also capable of assuming important control tasks, such as highly precise positioning of heavy loads.
The mathematical model of servovalve-controlled EHA is a strongly nonlinear one and reveals a switching nonlinearity due to constructive directional changes in the spool valve ports opening. This physical aspect gives the mathematical model the statute of a system with structural, autonomous switching. EHA is itself an actuator with feedback, but it can be viewed broadly as a system with feedback of the real world, and the delay on control will be regarded as a delay of the control signal in the block of the electrohydraulic servovalve. If we also consider the delay in the elaboration of the control law, the mathematical model of EHA becomes even more challenging.
Noting the competition with other types of actuators—electromechanical actuators, hydrostatic actuators, piezo actuators (see the so-called “green aircraft”)—we believe that the EHAs will for many years still be the right choice in many application domains.
This Special Issue is devoted to coverage of various advanced approaches in control techniques of EHAs, including for electrohydrostatic actuators: LQG, backstepping, sliding mode, and geometric control; adaptive control synthesis; intelligent control synthesis: neural, and fuzzy control; systems with delay; switching systems; Liapunov stability; and critical stability.
Dr. Ioan Ursu
Guest Editor
Manuscript Submission Information
Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.
Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Actuators is an international peer-reviewed open access monthly journal published by MDPI.
Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.
Keywords
- Electrohydraulic actuators
- Electrohydrostatic actuators
- Control techniques
- LQG
- Backstepping
- Sliding mode
- Geometric
- Adaptive
- Neural
- Fuzzy
- Delay
- Switching
- Stability
- Robustness
