The use of a low-cost five-band multispectral camera (RedEdge, MicaSense, USA) and low-altitude airborne platform is investigated for the detection plant stress caused by yellow rust disease in winter wheat sustainable agriculture. research mainly focused on: (i) determining whether or not healthy infected plants can be discriminated; (ii) selecting spectral band Spectral Vegetation Index (SVI) with strong discriminating capability; (iii) developing monitoring system at farmland scales. An...

This paper investigates the time-varying formation robust tracking problems for high-order linear multiagent systems with a leader of unknown control input in presence heterogeneous parameter uncertainties and external disturbances. The followers need to accomplish an expected state space track trajectory produced by simultaneously. First, protocol totally distributed form is proposed utilizing neighborhood information. With adaptive updating mechanism, neither any global knowledge about...

This paper studies the time-varying output formation (TVOF) tracking problems for heterogeneous linear multiagent systems with a nonautonomous leader on directed topologies, where dynamics of agents can be different in aspects both parameters and dimensions, have unknown control input. A TVOF protocol design algorithm are presented using neighboring interaction. In proposed protocol, distributed observer adaptive updating mechanism is constructed each follower to asymptotically estimate...

Time-varying formation tracking (TVFT) control problems for a team of unmanned aerial vehicles (UAVs) with switching and directed interaction topologies are investigated, where the follower UAVs realize given time-varying while leader UAV. A TVFT protocol is firstly constructed utilizing local neighboring information, information UAV only available to partial followers neighborhood can be switching. An algorithm composed four steps provided design protocol. It proved that swarm system using...

The adaptive practical optimal time-varying formation tracking problems of the disturbed high-order multi-agent systems with a noncooperative leader are considered. Different from former achievements, effects leader's unknown control input and followers' external disturbances both considered in issues. Firstly, an protocol is proposed. extended state observers neural networks introduced to estimate integrated uncertainty value function for protocol, respectively. Then, algorithm presented...

Practical time-varying formation tracking problems for second-order nonlinear multiagent systems with multiple leaders are investigated using adaptive neural networks (NNs), where the error caused by external disturbances can be arbitrarily small. Different from previous work, there exists a predefined formed states of followers and tracks convex combination unknown control inputs. Besides, dynamics each agent has both matched/mismatched heterogeneous nonlinearities simultaneously. First,...

Cooperative guidance strategy for multiple hypersonic gliding vehicles system with flight constraints and cooperative is investigated. This paper mainly cares about the coordination of entry glide phase driving-down phase. Different from existing results, both attack time angle are considered simultaneously. Firstly, phase, a two-stage method proposed to achieve rapid trajectories planning, where control signal corridors designed based on quasi-equilibrium conditions. In first stage, bank...

This paper studies the finite-time time-varying formation tracking problems for high-order multiagent systems (MASs) under influences of both mismatched disturbances and leader's unknown input. The outputs followers can not only realize prespecified but also track desired trajectory generated by leader in finite time. First, a disturbance observer is designed every follower to estimate Then, based on homogeneous control, integral sliding mode super-twisting algorithm, distributed protocol...

Cooperative guidance issues with impact time consensus against a maneuvering target are considered in this article. Different from the existing achievements, expected does not need to be predesigned, which is coordinated by multiple missiles using neighboring information. First, command generated maximum algorithm of time-to-go for each missile. Second, an analytical cooperative law bias proportional form proposed achieving consensus. In addition, convergence and stability analyzed. Third,...

This brief investigates the distributed fault-tolerant time-varying formation control problems for second-order multi-agent systems with directed interaction topologies in presence of both bias and loss effectiveness actuator failures. Using adaptive updating mechanism boundary layer theory, a continuous protocol is constructed to compensate failures derivative formations. The proposed totally without requiring any global knowledge about or bounds feasible condition provided, it proved that...

Fully adaptive practical time-varying output formation tracking issues of high-order nonlinear stochastic multiagent systems with multiple leaders are researched, where the fuzzy-logic system (FLS) is introduced for estimating mismatched integrated uncertain items. Distinctive former results, noise considered in dynamics, and followers required achieving probability convex combination leaders' outputs. First, a fully protocol put forward, which only utilizes neighboring relative information,...

Robust H <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">∞</sub> guaranteed cost time-varying formation tracking problems for high-order multiagent systems with external disturbances and delays are considered. It is required that the followers' states need to track leader's state actualize desired simultaneously. First, this paper devises a linear protocol considering effects of constituted by neighboring information. Then, an integral quadratic...

This paper addresses distributed time-varying output formation (TVOF) control problems using an adaptive output-feedback approach for general linear multiagent systems with directed communication topology. Compared the previous work on control, system can achieve a predefined TVOF via feedback without global information about First, controller is constructed dynamic and sequential observers. Through decomposition observability decomposition, are transformed into stabilization problems. Then,...

Time-varying group formation-containment tracking problems for general linear multiagent systems with unknown control input are investigated. Agents classified into leaders, formation and followers assigned in groups. Tracking leaders inputs provide unpredictable trajectories as macroscopic moving references. Formation accomplish desired subformations while following the trails of leaders. At same time, converge different convex hulls spanned by First, protocols designed neighboring relative...