Hybrid unmanned aerial vehicles (UAVs) integrate the efficient forward flight of fixed-wing and vertical takeoff and landing (VTOL) capabilities of multicopter UAVs. This paper presents the modeling, control and simulation of a new type of hybrid micro-small UAVs, coined as lifting-wing quadcopters. The airframe orientation of the lifting wing needs to tilt a specific angle often within $ 45$ degrees, neither nearly $ 90$ nor approximately $ 0$ degrees. Compared with some convertiplane and tail-sitter UAVs, the lifting-wing quadcopter has a highly reliable structure, robust wind resistance, low cruise speed and reliable transition flight, making it potential to work fully-autonomous outdoor or some confined airspace indoor. In the modeling part, forces and moments generated by both lifting wing and rotors are considered. Based on the established model, a unified controller for the full flight phase is designed. The controller has the capability of uniformly treating the hovering and forward flight, and enables a continuous transition between two modes, depending on the velocity command. What is more, by taking rotor thrust and aerodynamic force under consideration simultaneously, a control allocation based on optimization is utilized to realize cooperative control for energy saving. Finally, comprehensive Hardware-In-the-Loop (HIL) simulations are performed to verify the advantages of the designed aircraft and the proposed controller.

We address the theoretical and practical problems related to the trajectory generation and tracking control of tail-sitter UAVs. Theoretically, we focus on the differential flatness property with full exploitation of actual UAV aerodynamic models, which lays a foundation for generating dynamically feasible trajectory and achieving high-performance tracking control. We have found that a tail-sitter is differentially flat with accurate aerodynamic models within the entire flight envelope, by specifying coordinate flight condition and choosing the vehicle position as the flat output. This fundamental property allows us to fully exploit the high-fidelity aerodynamic models in the trajectory planning and tracking control to achieve accurate tail-sitter flights. Particularly, an optimization-based trajectory planner for tail-sitters is proposed to design high-quality, smooth trajectories with consideration of kinodynamic constraints, singularity-free constraints and actuator saturation. The planned trajectory of flat output is transformed to state trajectory in real-time with consideration of wind in environments. To track the state trajectory, a global, singularity-free, and minimally-parameterized on-manifold MPC is developed, which fully leverages the accurate aerodynamic model to achieve high-accuracy trajectory tracking within the whole flight envelope. The effectiveness of the proposed framework is demonstrated through extensive real-world experiments in both indoor and outdoor field tests, including agile SE(3) flight through consecutive narrow windows requiring specific attitude and with speed up to 10m/s, typical tail-sitter maneuvers (transition, level flight and loiter) with speed up to 20m/s, and extremely aggressive aerobatic maneuvers (Wingover, Loop, Vertical Eight and Cuban Eight) with acceleration up to 2.5g.

本文提出了一项新颖的控制法，以使用尾随机翼无人驾驶飞机（UAV）进行准确跟踪敏捷轨迹，该轨道在垂直起飞和降落（VTOL）和向前飞行之间过渡。全球控制配方可以在整个飞行信封中进行操作，包括与Sideslip的不协调的飞行。显示了具有简化空气动力学模型的非线性尾尾动力学的差异平坦度。使用扁平度变换，提出的控制器结合了位置参考的跟踪及其导数速度，加速度和混蛋以及偏航参考和偏航速率。通过角速度进纸术语包含混蛋和偏航率参考，可以改善随着快速变化的加速度跟踪轨迹。控制器不取决于广泛的空气动力学建模，而是使用增量非线性动态反演（INDI）仅基于局部输入输出关系来计算控制更新，从而导致对简化空气动力学方程中差异的稳健性。非线性输入输出关系的精确反转是通过派生的平坦变换实现的。在飞行测试中对所得的控制算法进行了广泛的评估，在该测试中，它展示了准确的轨迹跟踪和挑战性敏捷操作，例如侧向飞行和转弯时的侵略性过渡。

In this paper, we propose an effective unified control law for accurately tracking agile trajectories for lifting-wing quadcopters with different installation angles, which have the capability of vertical takeoff and landing (VTOL) as well as high-speed cruise flight. First, we derive a differential flatness transform for the lifting-wing dynamics with a nonlinear model under coordinated turn condition. To increase the tracking performance on agile trajectories, the proposed controller incorporates the state and input variables calculated from differential flatness as feedforward. In particular, the jerk, the 3-order derivative of the trajectory, is converted into angular velocity as a feedforward item, which significantly improves the system bandwidth. At the same time, feedback and feedforward outputs are combined to deal with external disturbances and model mismatch. The control algorithm has been thoroughly evaluated in the outdoor flight tests, which show that it can achieve accurate trajectory tracking.

安全始终是航空的优先事项。但是，当前的最新被动断层控制太保守了，无法使用。当前的最新主动故障控制需要时间进行故障检测和诊断以及控制切换。但是以后可能会恢复受损的飞机。大多数设计取决于确定为先验的故障，无法处理故障，从而导致原始系统的状态无法控制。但是，经验丰富的人类飞行员可以尽可能地节省发球障碍的飞机。由此激励，本文制定了一个原则，试图解释背后的人类飞行员行为，创造了重力补偿优先原则。这进一步支持了对飞机的可靠飞行控制，例如四轮驱动器和尾灯无人驾驶汽车。

随着垂直起飞和着陆和长航时的特点，倾转旋翼吸引了相当多的关注近几十年来其在民用和科研应用潜力。然而，强耦合，非线性特性和不匹配的干扰的问题，不可避免地存在于倾转旋翼机，它带来的过渡模式控制器的设计极大的挑战。在本文中，我们结合一个超扭曲扩张状态观测器（STESO）具有自适应递归滑模控制（ARSMC）一起使用STESO-ARSMC（SAC）来设计以过渡模式倾转旋翼飞行器姿态系统控制器。首先，六个自由度的倾转旋翼的（DOF）的非线性数学模型被建立。其次，美国和干扰是由STES观察者估计。第三，ARSM控制器旨在实现有限时间内收敛。 Lyapunov函数用来作证的倾转旋翼无人机系统的融合。新的方面是，状态的评估被并入控制规则来调整中断。相较于先前技术，控制系统，这项工作可以大大提高抗干扰性能提出。最后，模拟试验，是要证明建议的技术的有效性。

Enabling vertical take-off and landing while providing the ability to fly long ranges opens the door to a wide range of new real-world aircraft applications while improving many existing tasks. Tiltrotor vertical take-off and landing (VTOL) unmanned aerial vehicles (UAVs) are a better choice than fixed-wing and multirotor aircraft for such applications. Prior works on these aircraft have addressed aerodynamic performance, design, modeling, and control. However, a less explored area is the study of their potential fault tolerance due to their inherent redundancy, which allows them to tolerate some degree of actuation failure. This paper introduces tolerance to several types of actuator failures in a tiltrotor VTOL aircraft. We discuss the design and modeling of a custom tiltrotor VTOL UAV, which is a combination of a fixed-wing aircraft and a quadrotor with tilting rotors, where the four propellers can be rotated individually. Then, we analyze the feasible wrench space the vehicle can generate and design the dynamic control allocation so that the system can adapt to actuator failures, benefiting from the configuration redundancy. The proposed approach is lightweight and is implemented as an extension to an already-existing flight control stack. Extensive experiments validate that the system can maintain the controlled flight under different actuator failures. To the best of our knowledge, this work is the first study of the tiltrotor VTOL's fault-tolerance that exploits the configuration redundancy. The source code and simulation can be accessed at https://theairlab.org/vtol.

二次运动的准确轨迹跟踪控制对于在混乱环境中的安全导航至关重要。但是，由于非线性动态，复杂的空气动力学效应和驱动约束，这在敏捷飞行中具有挑战性。在本文中，我们通过经验比较两个最先进的控制框架：非线性模型预测控制器（NMPC）和基于差异的控制器（DFBC），通过以速度跟踪各种敏捷轨迹，最多20 m/s（即72 km/h）。比较在模拟和现实世界环境中进行，以系统地评估这两种方法从跟踪准确性，鲁棒性和计算效率的方面。我们以更高的计算时间和数值收敛问题的风险来表明NMPC在跟踪动态不可行的轨迹方面的优势。对于这两种方法，我们还定量研究了使用增量非线性动态反演（INDI）方法添加内环控制器的效果，以及添加空气动力学阻力模型的效果。我们在世界上最大的运动捕获系统之一中进行的真实实验表明，NMPC和DFBC的跟踪误差降低了78％以上，这表明有必要使用内环控制器和用于敏捷轨迹轨迹跟踪的空气动力学阻力模型。

微空中车辆（MAVS）在户外操作的限制靠近障碍物，通过他们承受风阵风的能力。目前广泛的位置控制方法，例如比例整体衍生物控制在阵风的影响下不会均匀。增量非线性动态反转（INDI）是一种基于传感器的控制技术，可以控制受扰动的非线性系统。它是为载人飞机或MAVS的态度控制而开发的。在本文中，我们将这种方法概括为严重燃烧负载下MAV的外环控制。在一个实验中对传统的比例积分衍生物（PID）控制器的显着改进进行了说明，其中四轮电机在10米/秒的吹风机排气进出中。控制方法不依赖于频繁的位置更新，如使用标准GPS模块的外部实验中所示。最后，我们研究了使用线性化来计算推力向量增量的效果，与非线性计算相比。该方法需要很少的建模并且是计算效率。

本文提出了一种用于特技飞行轨迹生成的新型算法，用于垂直起飞和降落（VTOL）TAILSITTER飞行飞机。该算法与固定翼轨迹生成的现有方法不同，因为它考虑了现实的六度自由度（6DOF）飞行动力学模型，包括空气动力学方程。使用全球动力学模型，能够生成特技轨迹，从而利用整个飞行信封，从而使敏捷的操纵通过摊位策略，侧向飞行，倒置飞行等。是在这项工作中得出的。通过在差异平坦的输出空间中执行快速最小化，可以获得适合在线运动计划的计算高效算法。该算法在包括六架特技飞行器的大型飞行实验中证明了这一算法，一个时间优势的无人机赛车轨迹以及三架尾灯飞机的飞机样有机赛序列。

我们提出了通过现实的模拟和现实世界实验来支持可复制研究的多运动无人机控制（UAV）和估计系统。我们提出了一个独特的多帧本地化范式，用于同时使用多个传感器同时估算各种参考框架中的无人机状态。该系统可以在GNSS和GNSS贬低的环境中进行复杂的任务，包括室外室内过渡和执行冗余估计器，以备份不可靠的本地化源。提出了两种反馈控制设计：一个用于精确和激进的操作，另一个用于稳定和平稳的飞行，并进行嘈杂的状态估计。拟议的控制和估计管道是在3D中使用Euler/Tait-Bryan角度表示的，而无需使用Euler/Tait-Bryan角度表示。取而代之的是，我们依靠旋转矩阵和一个新颖的基于标题的惯例来代表标准多电流直升机3D中的一个自由旋转自由度。我们提供了积极维护且有据可查的开源实现，包括对无人机，传感器和本地化系统的现实模拟。拟议的系统是多年应用系统，空中群，空中操纵，运动计划和遥感的多年研究产物。我们所有的结果都得到了现实世界中的部署的支持，该系统部署将系统塑造成此处介绍的表单。此外，该系统是在我们团队从布拉格的CTU参与期间使用的，该系统在享有声望的MBZIRC 2017和2020 Robotics竞赛中，还参加了DARPA SubT挑战赛。每次，我们的团队都能在世界各地最好的竞争对手中获得最高位置。在每种情况下，挑战都促使团队改善系统，并在紧迫的期限内获得大量高质量的体验。

开发了一个领导者追随者系统，用于合作运输。据我们所知，这是一个不需要互联通信的第一工作，并且可以实时修改有效载荷的参考轨迹，以便它可以应用于动态变化的环境。为了在无通信条件下实时跟踪修改的参考轨迹，引导跟随系统被认为是非文展系统，其中开发了控制器以实现有效载荷的渐近跟踪。为了消除安装力传感器的需要，开发了UKFS（Unscented Kalman滤波器）以估计领导者和追随者所施加的力量。进行稳定性分析以证明闭环系统的跟踪误差。仿真结果表明跟踪控制器的良好性能。实验表明，领导者的控制器和追随者可以在现实世界中工作，但是跟踪误差受到限制空间中气流的干扰的影响。

在本文中，提出了一个稳定稳定的轨迹跟踪控制器，用于多uav有效载荷运输。多uav有效负载系统在无人机和有效负载框架的垂直刚性链接之间具有2DOF磁球接头，因此无人机可以自由滚动或自由投球。这些垂直链接紧密地连接到有效载荷上，无法移动。为完整的有效载体 - uav系统得出了输入输出反馈线性化模型以及有效载荷轨迹跟踪的推力矢量控制。关于跟踪控制定律的理论分析表明，控制定律是指数稳定的，从而确保了沿期望轨迹的安全运输。为了验证拟议的控制定律的性能，提供了数值模拟以及高保真凉亭实时仿真的结果。接下来，针对两种实际情况分析了提议的控制器的鲁棒性：有效载荷和有效载荷质量不确定性的外部干扰。结果清楚地表明，所提出的控制器在实现指数稳定的轨迹跟踪的同时具有稳健性和计算效率。

This book provides a solution to the control and motion planning design for an octocopter system. It includes a particular choice of control and motion planning algorithms which is based on the authors' previous research work, so it can be used as a reference design guidance for students, researchers as well as autonomous vehicles hobbyists. The control is constructed based on a fault tolerant approach aiming to increase the chances of the system to detect and isolate a potential failure in order to produce feasible control signals to the remaining active motors. The used motion planning algorithm is risk-aware by means that it takes into account the constraints related to the fault-dependant and mission-related maneuverability analysis of the octocopter system during the planning stage. Such a planner generates only those reference trajectories along which the octocopter system would be safe and capable of good tracking in case of a single motor fault and of majority of double motor fault scenarios. The control and motion planning algorithms presented in the book aim to increase the overall reliability of the system for completing the mission.

This paper introduces a structure-deformable land-air robot which possesses both excellent ground driving and flying ability, with smooth switching mechanism between two modes. The elaborate coupled dynamics model of the proposed robot is established, including rotors, chassis, especially the deformable structures. Furthermore, taking fusion locomotion and complex near-ground situations into consideration, a model based controller is designed for landing and mode switching under various harsh conditions, in which we realise the cooperation between fused two motion modes. The entire system is implemented in ADAMS/Simulink simulation and in practical. We conduct experiments under various complex scenarios. The results show our robot can accomplish land-air switching swiftly and smoothly, and the designed controller can effectively improve the landing flexibility and reliability.

飞行脊椎动物表现出复杂的Wingbeat运动学。他们的专门的前肢允许机翼变形动作在他们的水平飞行过程中与拍打动作加上，以前的可传单仿生平台已经成功地应用了生物启发的翼形变形，但不能被变形耦合的翼展图案推动。由此促进了这一点，我们开发了一个生物启发型扑翼空中车辆（FWAV），题为Robofalcon，配备了一种新颖的机制来推动蝙蝠式的变形翅膀，表现出变形耦合的翼型模式，并整体管理吸引力航班。 Robofalcon的新机制允许在需要在需要操纵时耦合变形和拍打，并在需要操纵时去耦，产生双侧不对称下划作，提供高轧制敏捷性。蝙蝠式的变形翼设计在腕关节的半径周围的倾斜安装角，以模仿飞行脊椎动物的手腕浸湿效果。通过几种轧制机动飞行测试评估了Robofalcon的敏捷性，与飞行生物和当前拍打翼平台相比，我们展示了其性能良好的敏捷性能力。风洞测试表明，不对称下午的辊矩与拍打频率相关，腕部安装角可用于调谐静止飞行状态的攻击角度和提升 - 推力配置。我们认为，这项工作产生了一个良好的仿生平台，为变形耦合扑拍飞行提供了新的驱动策略。

跟踪位置和方向独立提供了更敏捷的动作，以实现过度射击的多旋翼无人机（UAV），同时引入了不希望的倒入效果；推力发电机产生的倾斜流可能会因接近性而抵消其他流动，从而极大地威胁了平台的稳定性。建模空气动力气流的复杂性挑战了适当补偿这种副作用的算法。利用无人机分配的输入冗余，我们通过新的控制分配框架来解决此问题，该框架考虑了倾斜效果，并探索了整个分配空间以获得最佳解决方案。该最佳解决方案避免了倾斜效果，同时在硬件约束中提供了高推力效率。据我们所知，我们的是第一个调查对过度驱动无人机的倾斜影响的正式推导。我们在模拟和实验中验证了不同硬件配置的框架。

对于腿部机器人，航空动作是唯一可以通过标准运动步态绕过的障碍物的唯一选择。在这些情况下，机器人必须进行飞跃，以跳到障碍物或飞越障碍物上。但是，这些运动代表了一个挑战，因为在飞行阶段\ gls {com}无法控制，并且机器人方向的可控性有限。本文重点介绍了后一个问题，并提出了一个由两个旋转和驱动的质量（飞轮或反应轮）组成的\ gls {ocs}，以获得机器人方向的控制权。由于角动量的保护，即使与地面没有接触，它们的旋转速度也可以调节以引导机器人方向。飞轮的旋转轴设计为入射，导致一个紧凑的方向控制系统，该系统能够控制滚动和俯仰角，考虑到这两个方向的不同惯性矩。我们通过机器人Solo12上的模拟测试了该概念。

A reduced order model of a generic submarine is presented. Computational fluid dynamics (CFD) results are used to create and validate a model that includes depth dependence and the effect of waves on the craft. The model and the procedure to obtain its coefficients are discussed, and examples of the data used to obtain the model coefficients are presented. An example of operation following a complex path is presented and results from the reduced order model are compared to those from an equivalent CFD calculation. The controller implemented to complete these maneuvers is also presented.

空中操纵的生长场通常依赖于完全致动的或全向微型航空车（OMAV），它们可以在与环境接触时施加任意力和扭矩。控制方法通常基于无模型方法，将高级扳手控制器与执行器分配分开。如有必要，在线骚扰观察员拒绝干扰。但是，虽然是一般，但这种方法通常会产生次优控制命令，并且不能纳入平台设计给出的约束。我们提出了两种基于模型的方法来控制OMAV，以实现轨迹跟踪的任务，同时拒绝干扰。第一个通过从实验数据中学到的模型来优化扳手命令并补偿模型错误。第二个功能优化了低级执行器命令，允许利用分配无空格并考虑执行器硬件给出的约束。在现实世界实验中显示和评估两种方法的疗效和实时可行性。