Accurate tracking of a given path is one of the primary factors in the maneuverability of a vehicle and is also an important topic in autonomous vehicle research. To solve the problem of vehicle path tracking, the problem must first be transformed into an optimal control problem. Then, a symplectic pseudospectral method (SPM) based on the third-generation function of symplectic theory and pseudospectral discretization is proposed to efficiently solve the nonlinear optimal control problems. Finally, the results obtained by the proposed algorithm are compared with those obtained by the Gauss pseudospectral method (GPM). The simulation results show that the proposed method can effectively solve the vehicle path tracking problem. Furthermore, the vehicle can track the given path controlled by the proposed algorithm with higher accuracy and greater applicability than other methods.
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http://dx.doi.org/10.3390/s23156673 | DOI Listing |
Sensors (Basel)
December 2024
Faculty of Mechatronics, Warsaw University of Technology, ul. św. Boboli 8, 02-525 Warsaw, Poland.
This paper considers the problem of flying a UAV along a given trajectory at speeds close to the speed of sound and above. A novel pitch channel control system is presented using the example of a trajectory with rapid and large changes in flight height. The control system uses a proportional-integral-differential (PID) controller, whose gains were first determined using the Ziegler-Nichols II method.
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December 2024
School of Vehicle and Transportation Engineering, Tsinghua University, Beijing 100083, China.
In response to the current situation of backward automation levels, heavy labor intensities, and high accident rates in the underground coal mine auxiliary transportation system, the mining trackless auxiliary transportation robot (MTATBOT) is presented in this paper. The MTATBOT is specially designed for long-range, space-constrained, and explosion-proof underground coal mine environments. With an onboard perception and autopilot system, the MTATBOT can perform automated and unmanned subterranean material transportation.
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December 2024
State Key Laboratory of Robotics and System, Harbin Institute of Technology (HIT), Harbin 150001, China.
Some large social environments are expected to use Covered Path Planning (CPP) methods to handle daily tasks such as cleaning and disinfection. These environments are usually large in scale, chaotic in structure, and contain many obstacles. The proposed method is based on the improved SCAN-STC (Spanning Tree Coverage) method and significantly reduces the solution time by optimizing the backtracking module of the algorithm.
View Article and Find Full Text PDFChildren (Basel)
November 2024
Department of Pediatric Nursing, Faculty of Nursing, Tanta University, Tanta 31527, Egypt.
Background: Pediatric orthopedic nursing requires specialized competencies to optimize patient outcomes, particularly in the complex realm of pediatric surgery. This study explores the effectiveness of the Pediatric Nursing Excellence (PNE) Model in enhancing nurses' knowledge and clinical practice in providing perioperative care for pediatric orthopedic patients in tertiary care inpatient settings.
Methods: A double-blind, randomized controlled trial was conducted from February to July 2024, involving 100 nurses from two tertiary care hospitals in Tanta, Egypt.
Animals (Basel)
December 2024
Department of Electrical and Computer Engineering, North Carolina State University, Raleigh, NC 27695, USA.
Canine-assisted interactions (CAIs) have been explored to offer therapeutic benefits to human participants in various contexts, from addressing cancer-related fatigue to treating post-traumatic stress disorder. Despite their widespread adoption, there are still unresolved questions regarding the outcomes for both humans and animals involved in these interactions. Previous attempts to address these questions have suffered from core methodological weaknesses, especially due to absence of tools for an efficient objective evaluation and lack of focus on the canine perspective.
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