Abstract
The research objective of this paper is to propose a new type of ERSD to solve the problem of the uncontrollable velocity of the claw in the current RSD. Firstly, the working characteristics of the RSD in ASIST are analyzed, and the design scheme of the transmission system of the ERSD is provided. The control system is designed by combining the vector control algorithm with the fuzzy adaptive PID control algorithm. On this basis, the trajectory planning of claw capture velocity is completed. Finally, the dynamics model of the transmission system of the ERSD is built by power bond graph theory, and the system simulation is carried out. The results show that the maximum capture time, velocity, and force were reduced by 47%, 53%, and 80%. In addition, when the ERSD is towing the helicopter, the mechanical claw can still provide good velocity tracking performance under a maximum interference load of 34,000 N.
Highlights
Research Center of Special Carrier Equipment of Yanshan University, Yanshan University, Key Laboratory of Special Carrier Equipment of Hebei Province, Yanshan University, School of Vehicle and Energy, Yanshan University, Qinhuangdao 066004, China
In this paper, aiming at the problems existing in the capture and towing stages of the RSD, an implementation scheme of Electric Rapid Secure Device (ERSD) for shipborne helicopters is proposed for the first time
When the ERSD performs the capture mission, the capture motor directly drives the movable pulley through the ball screw, which is converted to the transverse motion of the claw through the chain drive mechanism
Summary
Many shipborne helicopters landing assist systems have been proposed to solve the problem of shipborne helicopters landing safely on medium and small ships and to improve the attendance rate of the shipborne helicopter in bad sea conditions, including Harpoon. Few people have paid attention to ASIST’s problems of large impact force on shipborne helicopters during capture and complex towing steps during towing missions These two problems are caused by the fact that ASIST’s execution engine, Rapid Secure Device (RSD), uses a quantitative hydraulic pump and accumulator as its power source, making the claw’s velocity uncontrollable [11,12,13]. Suppose the asynchronous motor is matched with a stable and reliable velocity regulation algorithm In this case, we can use the asynchronous motor instead of the hydraulic pump and accumulator as the power source of the RSD to solve the above problems. In this paper, aiming at the problems existing in the capture and towing stages of the RSD, an implementation scheme of Electric Rapid Secure Device (ERSD) for shipborne helicopters is proposed for the first time. The ERSD expands ASIST’s range of applications to include small shipborne aircraft such as the Unmanned Aerial Vehicle (UAV) and improves the efficiency of ASIST’s towing operations
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