The transformation of vector measurements into attitude measurements is known as the Wahba problem in the literature of attitude estimation. This review introduces various algorithms for minimizing the Wahba’s loss function, including estimator of the optimal quaternion (ESOQ), quaternion estimator ...

Aiming at the problem of poor feature extraction and feature matching in the underwater visual simultaneous localization and mapping (SLAM) front end, an image-enhanced algorithm based on weighted fusion is proposed for the underwater visual SLAM front end. Specifically, the algorithm is based on th...

Low-flying birds flying in the vicinity of the airports are a serious threat to the safety of aircraft takeoff and landing, and the existing bird-repelling measurements make it difficult to effectively repel low-flying birds for high instrument resource consumption and large spatio-temporal influenc...

This study provides a frequency domain identification approach aimed at the high-order time-delay model matching problem for complex systems like carrier aircraft. A high-order time-delay model of the complex system is ultimately identified after the generalized frequency-domain identification model...

Under general directed topology conditions, a consensus control approach with uncertainty in communication networks is studied, and a consensus controller based on output feedback is built, with the aim of solving the consensus control problem of a class of Lipschitz nonlinear multi-agent systems. B...

Addressing the impact of latency issues on cluster stability. The traction control strategy is studied. Through the use of feedback linearization, the autonomous underwater vehicle (AUV) model is reduced to a second-order integrator model. The formation control problem of multiple AUV clusters with ...

Limited detecting range, low precision, and poor stability are just a few of the issues with obstacle detection and tracking that arise when using a single millimeter wave radar, or LiDAR, on an unmanned vehicle in a park. An obstacle-detecting and tracking approach based on the fusion of radar and ...

Perception is the foundation and key issue to autonomous driving, but most single models can’t simultaneously complete multiple detection tasks such as traffic objects, drivable areas, and lane lines. This paper proposes a multi-task traffic scene detection model based on cross-attention, which can ...

In order to form logical and traceable airworthiness conformity materials, an engineering test method for an avionics system based on a conformity evidence chain is proposed, and the key problems in the implementation are analyzed and studied. A validation platform based on the specifications of an ...

To provided a fast solution to multi-UAV and multi-task flight control law design, this paper presents a control law structure based on the active-disturbance rejection control method, and designs a reusable extended state observer and tracking differentiator. Meanwhile, the application of this meth...

Multilinks rotorcraft has the characteristic of configuration transformation, which is an effective configuration design method to deal with the variation of motion space. The dynamic reconfiguration flight of Multilinks rotorcraft has a critical configuration interval that cannot be achieved becaus...

The passenger door is an important part of the cabin door mechanism of civil aircraft, which directly affects the integrity and safety of the aircraft structure and function. A new opening and limiting device was created to control the falling speed of the passenger door after the causes of the dama...

To realize security and accurate strikes under the battlefield environment with various obstacles, unmanned aerial vehicle swarm must possess the ability of self-formation reconfiguration. The unmanned aerial vehicle movement model and leader follower swarm formation control structure are establishe...

The mechanical gap of the turntable in the rotating binocular stereo vision system causes the left and right cameras to rotate and deviate in translation, severely distorting the stereo rectification image. To solve this problem, a rotating binocular stereo rectification algorithm based on hierarchi...

A vibration control with direct joint torque input is presented for flexible spacecraft systems subject to external disturbances and output limits. Firstly, the dynamic characteristics of the system are described by a distributed parameter model which is composed of partial differential equation (PD...

Advances in miniaturization are enabling the development of microscale swam with the advantages of high functional density, lower cost and high flexibility for the potential applications of reconnaissance monitoring, and space offensive and defensive operations. Facing the development trend of space...

Based on the characteristics of short take-off and vertical landing (STOVL) aircraft, the flight quality requirements of STOVL aircraft are proposed in light of control efficiency and modal characteristics, combined with the AGARD 577 flight quality specification. The control efficiency of the vehic...

The security requirements of the unmanned aerial vehicle (UAV) swarm system are extremely strict, and real-time fault detection and diagnosis is one of its important supporting technologies. This paper presents a fault diagnosis method based on statistical model and improved broad learning system (B...

To address the problem of complex terrain environment and various threats and constraints, this article proposes a path planning algorithm for UAV based on ε-level improved bat algorithm. First, according to the drone target function and constraints, a three-dimensional path planning model of the UA...

Achieving ultra-precision and ultra-stable requirements is challenging in the space gravitational wave detection mission due to complex disturbances present in the spacecraft's internal test masses, including load hardware noise, environmental noise, and micro-thrust coupling noise.These disturbance...

The random error online compensation method of optical gyro establishes a random error model offline and compensates random error online by Kalman filter. However, when used for online compensation, the offline random error model has deviation due to the influence of the external environment and the...

The paper presents a robust adaptive global control method based on radial basis function (RBF) neural network for quadrotors with model uncertainties and bounded external disturbances. The method combines the strong fitting ability of neural network control to unknown nonlinearities and the global ...

Application of helicopter to transport heavy and bulky loads creates various stability problems especially during maneuvering from level flight to hovering; thus, it is significant to reduce the swing amplitude of suspended loads. An anti-swing controller is designed for a helicopter with slung load...

Wind energy is one of the most promising renewable energy sources in China, and the main factors affecting the application of wind energy conversion are the control method and characteristics of wind turbines. This study proposes a vector control technique based on air gap flux orientation, addressi...

According to the characteristics of unmanned aerial vehicle kinematics model and the problem of remote forming, an improved consensus-based algorithm was proposed to solve the gathering-forming strategy of unmanned aerial vehicle. The coordinate system which can describe the formation directly was e...

The problem of satellite system effectiveness assessment is the basis of satellite efficiency improvement and satellite program optimization design. Taking the attitude control system for earth observation satellite attitude control system as the object of effectiveness assessment, an analysis of sa...

To address the control problem of the position loop and attitude loop of the quadrotor, so that the position and attitude of the quadrotor can be stable in the predetermined time, a position and attitude controller based on the predefined time sliding mode control algorithm is proposed. By controlli...

To address the problems of the existing quadruped robot's insufficient obstacle surmounting ability and unstable obstacle surmounting, a new wheel-legged robot was proposed to achieve high obstacle surmounting and stable centroid through wheel-train transmission. Adopting the wheel configuration, th...

In response to problems like the inevitable nonlinearities, uncertainties and dynamic external disturbances in multi-machine power systems, a distributed adaptive anti-disturbance control scheme is proposed based on radial basis function neural networks (RBFNN) and nonlinear disturbance observers (N...

This paper studies the fire control calculation problem of air-breathing high-speed aircraft. High-speed aircraft has higher requirements for the fire control model calculation, a more complicated flying environment, and a shorter response time than traditional subsonic and supersonic combat aircraf...

A fixed-time formation control approach is proposed for the formation control of underactuated nonlinear quadrotor UAV swarm with unknown disturbances. Firstly, a distributed fixed-time sliding mode estimator is designed. Each UAV can quickly estimate its own desired position information under the c...

For the dynamic calibration of high-temperature thermocouples, the thermal strength test of aero-engine blades, and other application scenarios, the thermal wind tunnel can offer a well-distributed and stable temperature field. How to control the thermal flow generated by thermal wind tunnel in a wi...

For the hypersonic vehicle, a time coordination predictor-corrector guidance approach based on an open-loop coordination structure is presented to achieve the time coordination of the entry gliding process. The guidance method does not depend on real-time communication between the vehicles. The long...

In the area of intelligent warfare, unmanned system combat capabilities have increasingly become an important factor in the military strength of major powers. When utilizing unmanned aerial vehicles for air-to-ground assault operations, it is imperative to assess and prioritize the enemy’s ground ta...

With the maturity of unmanned aerial vehicle (UAV) technology, UAVs are being used more and more widely in the military and civilian fields. Meanwhile, the safety of UAV is gradually being emphasized. The health of the UAV’s flight can be immediately reflected in its flight data. Anomaly detection r...

This paper proposed a deformation-aided altitude control strategy for the high aspect ratio aircraft to address the flight control problem of the structure/flight coupling dynamics. Based on the assumption of element wings, the dihedral deformation of high aspect ratio aircraft are constructed, and ...

With the continuous development of industry and aerospace technology, the working conditions and failure modes of rotating machinery are becoming increasingly diversified and complex, and reliability and safety problems are becoming increasingly prominent. It is critical to research efficient fault ...