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Xinghu Yu - IEEE Xplore Author Profile

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Organoids are cell clusters cultured in vitro that maintain the structure and function of the donor organs. They have found important applications in biomedicine, such as drug screening and personalized therapy. However, conventional organoid culture methods lack control of physical properties like size and distribution, leading to increased heterogeneity and very low batch-to-batch reproducibilit...Show More
This brief presents an adaptive neural zeta-backstepping control strategy for a class of uncertain nonlinear systems, which allows these systems to be practically stabilized with predefined damping ratios. By introducing the zeta-backstepping technique, system damping ratios can be predetermined based on specific parameter selection rules. To reduce the impact of unknown nonlinearities, neural net...Show More
Structural coupling and complex environments bring challenges to the precision movement of gantry multi-axis systems in industrial production. In particular, ensuring the transient and steady-state performance of the gantry system under dynamic loads is a difficult problem to be addressed. This letter proposes an adaptive prescribed performance control (APPC) approach to obtain the required dynami...Show More
The z-axis actuator is a critical component in many high-end intelligent equipment, such as surface mount equipment. The tubular slotless permanent magnet linear synchronous motor (TPMLSM) is advantageous in these applications, offering both high thrust density and dynamic response. However, this topology is associated with challenges, including thrust fluctuation and substantial copper losses. To...Show More
In the field of smart surface mount technology (SMT) production, integrating machines through a cyber-physical system (CPS) architecture holds significant potential for improving assembly quality and efficiency. However, fully unifying inspection and production systems to effectively address assembly-related quality issues remains a challenge. This study seeks to close these gaps by introducing co...Show More
Dual-gantry surface mount optimization effectively improves the productivity of printed circuit board assembly (PCBA), but also brings new challenges. Optimizing workload allocation to balance the front and rear gantry placement completion time is a significant challenge for improving PCBA productivity. This study proposes a finite potential game heuristic algorithm (FPGHA) to solve the workload a...Show More
In mounting machines, vision measurement of surface mount devices (SMDs) is a crucial task, widely used for size calculation and defect detection. However, current vision measurement methods focus on specific SMDs, such as quad flat packages. There is no unified method for measuring all kinds of rectangular-pin components, which account for more than half of the SMDs processed in mounting machines...Show More
This article introduces a novel composite aerial vehicle configuration called hybrid quadrotor with all-moving wings (HQWAW), consisting of a conventional quadrotor combined with two independently all-moving wings. A nonlinear geometric controller in the special Euclidean group SE(3) is proposed as the basic controller for the HQWAW, achieving high maneuverability and energy-efficient flight. Lyap...Show More
When a manipulator moves in a highly dynamic scenario with a large range of rapid motion, the coupling disturbances between the manipulator and the UAV in the aerial manipulator system (AMS) become very strong, which directly affects the ability of the AMS to perform aerial manipulation and even poses a threat to the safety of the system. The aim of this article is to address the strong coupling d...Show More
To enhance tracking performance and accuracy of linear motor (LM) systems, it is essential to consider the main system uncertainties, such as parameter variations, unmodeled dynamics, and external disturbances, in the control algorithm design. This article proposes a novel motion control scheme based on the utilization of an integral sliding mode observer (SMO). Initially, an indirect adaptive str...Show More
Synchronization control is a key technology in dual-axis linear motor gantry synchronous (DALMGS) systems, since it achieves high acceleration and accuracy for large inertia equipment. However, during long operating periods, linear motors may be affected by a variety of faults, such as demagnetization, wear, or nonlinear drift, among others. These faults can seriously affect the performance of DAL...Show More
This article presents a novel compound aerial vehicle configuration called the hybrid quadplane with all-moving wings (HQWAWs), and provides a six-degrees-of-freedom (6-DOF) flight dynamics modeling and nonlinear controller design for this new configuration. Compared to traditional quadrotors, the HQWAW add two wings on left and right sides of the quadrotor. Each wing is a single structure that ca...Show More
The optimization of printed circuit board assembly (PCBA) for a beam head placement machine is a multivariable and multiconstraint combinatorial problem. Current techniques falter in solving a variety of PCBA problems since heuristic algorithms lack theoretical guarantees of optimality, and mathematical modeling methods have high computational complexity for the whole problem. This article propose...Show More
Unmanned aerial manipulators (UAMs) extend the operational reach of unmanned aerial vehicles (UAVs), yet are often limited by the underactuation of traditional UAV platforms, restricting the workspace of their end-effectors. This article introduces an overactuated UAM system comprising a biaxial-tilting thrust-vectoring quadrotor coupled with a serial manipulator. This configuration offers superio...Show More
Rapid convergence and strong immunity of attitude control under the influence of internal and external disturbances are crucial for aerial manipulators in aerial work tasks. In this article, a practical finite-time fast adaptive backstepping (FAB) attitude control method based on variable coupling disturbance (VCD) compensation is proposed for aerial manipulators to achieve this goal. Unlike tradi...Show More
Permanent magnet linear synchronous motors (PMLSMs), as key drivers in the field of transportation, have a significant impact on the efficiency and reliability of transportation systems. This is due to their excellent performance in tracking accuracy and fault tolerance. Nevertheless, during long periods of operation, PMLSMs may potentially exhibit a multitude of actuator and sensor failures due t...Show More
Repetitive motion is one of the most common motion tasks in linear motor (LM)-driven system. The LM performs repetitive motion based on a periodic target trajectory under control, thus leading to periodic characteristics in certain system uncertainties. For this type of task, this article proposes an iterative learning observer-based high-precision motion control scheme that comprehensively consid...Show More
Attitude tracking of quadrotors under external disturbances is a challenging problem. This brief presents a backstepping method that integrates a function-adaptive rule designed as an attitude controller for quadrotors. The adaptive law based on command filters is capable of achieving an online adaptive approximation of the unknown function of the system without requiring any additional function-f...Show More
In this article, a practical finite-time command-filtered adaptive backstepping (PFTCFAB) control method is presented for a class of uncertain nonlinear systems with nonparametric unknown nonlinearities and external disturbances. Unlike PFTCFAB control techniques that use neural networks (NNs) or fuzzy-logic systems (FLSs) to deal with system uncertainties, the proposed method is capable of handli...Show More
Thanks to the advancements in micro- and nanomechatronics techniques, the capability to inject foreign materials into target locations inside biosamples has become increasingly crucial. However, technical problems, like orientation and penetration, make manual microinjection challenging, while most available automated platforms are too targeted and often fail to support reconfiguration for differe...Show More
Multirotors have been extensively used due to their simple structure and flexible flight capabilities. However, traditional coplanar multirotors are underactuated in such a way that their 3-degree-of-freedom (DoF) position and 3-DoF attitude cannot be controlled simultaneously. This article proposes a new overactuated flight platform using biaxial-tilt actuation unit (BTAU), called Quad3DV, with c...Show More
Surface mount technology is essential to the development of the electronic manufacturing industry. This article studies optimizing the surface mount process for the beam-head placement machine. A mixed-integer programming (MIP) model is proposed for this problem, which is decomposed into three interconnected hierarchical parts: feeder allocation; component assignment; and pick-and-place (PAP) sequ...Show More
In this article, a velocity-free adaptive controller is proposed for the tracking control of servo mechanisms with friction compensation. A continuously differentiable friction model is employed to compensate for the dominant friction nonlinearity of servo mechanisms. Besides, a projection-type adaptive law is applied to handle parameter uncertainties in the system model. Since only the output pos...Show More
This brief presents an adaptive neural network (NN) zeta-backstepping control method for a class of uncertain nonlinear systems with unknown nonlinearities. Different from the traditional adaptive NN backstepping control scheme, the proposed adaptive NN zeta-backstepping control approach can regulate the damping ratio of a system by using prescribed parameter selection rules. To guarantee the stab...Show More
Dual-linear-motor-driven gantry stages (DLMDGS) are crucial components of high-end manufacturing equipment, known for their ability to achieve high-precision control at high-speeds. However, the traditional model-based control method has almost reached its limits in terms of improving control performance. In this paper, a novel approach is proposed to improve control performance by considering the...Show More