Due to the complexity of landing environments, precision guidance and high-precision control technology have become key rope-hook recovery shipborne unmanned aerial vehicles (UAVs). The process was divided into three stages a reasonable strategy had been designed for them, respectively. This study separated issues an outer loop inner loop. (attitude loop) controled UAV follow acceleration comma...

The electromagnetic linear actuator is used as the core drive unit to achieve high precision and response in direct-drive actuation system. In order improve performance control accuracy of unit, an improved sliding mode-active disturbance rejection (ISM-ADRC) method was proposed. A motor model established based on LuGre dynamic friction. position loop adopts integral traditional mode extended s...

Visual servoing has been widely employed in robotic control to increase the flexibility and precision of a arm. When end-effector arm needs be moved spatial point without coordinate, conventional visual method difficulty performing task. The present work describes space constraint challenges system by introducing an assembly node then presents two-stage approach based on perspective transformat...

When the linear active disturbance rejection control (LADRC) is applied for voltage-controlled inverter, discrete period and measurement noise limits observer bandwidth, which affects anti-disturbance performance of system. This results in a poor ability to deal with output voltage fluctuation under load switch. In this paper, novel LADRC strategy based on known compensation proposed inverters....

Autonomous ground vehicles (AGVs) are receiving increasing attention, and the motion planning control problem for these has become a hot research topic. In real applications such as material handling, an AGV is subject to large uncertainties its challenging. this article, we investigate by proposing hierarchical scheme, which integrated model predictive (MPC)-based path trajectory tracking at h...

High-order filters, such as LCL, are more commonly employed in grid-connected inverters (GcIs) an interference element for the better attenuation of switching harmonics. However, LCL filters may have resonance poles and antiresonance zeros frequency response with inverter side current. This affect stability system limit control bandwidth simple single-loop PI control. becomes severe introductio...

A novel 6-degree-of-freedom parallel platform and its motion control based on a modified active disturbance rejection controller are presented in this article. Structure and mathematical model of a novel electromagnetic linear actuator are analyzed, which is the main component of the novel 6-degree-of-freedom parallel platform. Kinematics-based control method of the 6-degree-of-freedom parallel...