The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
One of the most exciting applications of V2X technologies, that is envisioned, is the platooning of a series of autonomous vehicles led by a manually driven vehicle. However, the realization of this application depends entirely on the efficacy of a platoon control algorithm and the communication channel amongst the platoon members. There are many different control algorithms that are being considered...
This paper presents a novel vehicle platoon control algorithm using Vehicle to Vehicle (V2V) and Vehicle to Infrastructure (V2I) wireless communications between platoon members. A platoon forms a chain of vehicles (e.g., trucks) for improved traffic and fuel efficiency. Platooning algorithms aim to maintain small inter-vehicular distance between vehicles under dynamic driving conditions like acceleration...
This paper presents a design methodology for the development of self-powered active lateral secondary suspensions for rail vehicles. It first investigates the energy flow in the active lateral secondary suspensions and analyzes the conditions for self-powered control in detail. The impact of the controller design on both ride quality and energy consumption is then used to guide the design/specification...
Air-Breathing Hypersonic Vehicles (AHVs) are kind of winged or wingless aerospace vehicles, which could fulfill cruising flight in the atmosphere 20∼100 kilometers above the ground and travel five times faster than sound. The AHVs' dynamic model manifests such characteristics as nonlinearity, quick time-variance, uncertainty, strong couplings and non-minimum phase, et al, which make the controller...
Abstmct-This paper presents a kind of real time obstacle detection method for underwater vehicles equipped with 2D forward looking sonar. Due to frequent failure or multipath effects, it is very often uneasy to get satisfactory sonar range measurements, especially in the water tank environment. How to extract as accurate as possible environmental information from these sonar raw (noisy) measurements...
This paper presents a bio-inspired search behavior model for navigating using geomagnetic information in unknown environments. A multi-objective search navigation framework combining random walk movement model and stress evolution algorithm is applied to the navigation. Firstly, motivated by animal geomagnetic navigation behavior, we generalize the bio-inspired navigation process as the convergence...
Main factors of maintenance process and their correlation are analyzed in this paper. Inheriting MKDN and SACA description method, the modeling method based on the time-order model and agent technique is put forward and applied in some maintenance work process of a track vehicle. The results show that the modeling method is applicable to analyze maintenance process of complicate materials and provides...
In this paper, we present a range sonar array based SLAM method for P-SURO AUV which is a test-bed for developing various underwater technologies. The vehicle's operating environment is a 12(L)x8(W)x6(D)m dimensional cuboid basin and its wall information is assumed to be known in priori. With this information, we propose an EKF (Extended Kalman Filter) SLAM method for the vehicle's operation in the...
Real-time traffic data is the main information source of Traffic Management Center (TMC) and Intelligent Traffic System (ITS), the qualities of collected data will affect the accuracy of the entire traffic control system directly. To improve the qualities of data, error processing must be used. In the paper, based of the large number of studies in related fields at home and abroad, the error processing...
P-SURO is a prototype autonomous underwater vehicle (AUV), which is under development as a test-bed for developing underwater technologies such as underwater vision, underwater navigation, and guidance. This vehicle is a hovering type with four thrusters mounted to steer its 6DOF underwater motion, a color camera is mounted at the vehicle's nose for underwater vision, and an AHRS combined with one...
With the expressway network density increasing and high-speed railway opening, the transport service capacity grows fast, which also leads to more and more intense competition of various passenger transports. In this paper, we build the passenger transport model and also add Metrics in LOGIT model based on the selection of all travel methods, in considering the influence of traveler income, trip purpose...
Mapping the streets and street-crossings of the Nanjing city plan onto nodes and edges of a dual graph, we implement the traffic model of vehicles moving towards specified destinations with navigation and queuing. The navigation rules with local search within the next-nearst-neighborhood are applied both with and without dynamical feedback. The traffic is autonomously driven with a parameter which...
Communication plays an important role in modern automotive system architecture. In order to optimize the AUTOSAR intra-ECU communication, an approach based on mapping runnable entities is proposed to reduce task switching, and avoid communication data inconsistency and time delay. Taking into account the various communication behaviors of all runnable entities in the current ECU, we provide six extended...
This paper considers the path tracking problem for a class of underactuated autonomous underwater vehicles (AUVs), where only surge force and stern plane are available for vehicle's 3DOF diving motion. For these torpedo-type flying vehicles, the pitch moment is proportional to the vehicle's forward speed. Therefore, if vehicle takes slow motion, then we cannot fully excite the vehicle's pitch motion...
In this paper, the nonlinear dynamic characteristics of vehicle semi-active suspension system with SMA spring was studied. SMA spring was applied in semi-active suspension system to substitute ER and MR fluid to provide controllable force. Hysteretic cycle and multinomial model were introduced to set up a new kind of continuous SMA strain-stress-temperature model, based on which the nonlinear dynamic...
This paper considers diving control problems for underactuated autonomous underwater vehicles (AUVs) with only surge force and pitch moment available for its 3D vertical motion. By introducing certain two polar coordinates transformations, the vehicle's kinematics and dynamics can be reduced to a certain two-input-two-output (TITO) second-order nonlinear strict-feedback form, upon which the proposed...
In this paper, a new research for semi-active suspension system of vehicle is proposed. Assuming the stochastic excitations are Gauss white noises, we establish a stochastic model on semi-active suspension system. Here we consider two kinds of stochastic excitations: one is the inner multiplicative excitation brought by the inner system such as the spring and damper, the other is the outer excitation...
This paper presents a robust NN control scheme for diving behavior of an autonomous underwater vehicle (AUV) whose dynamics can be simplified as a second-order TITO (two-input-two-output) nonlinear function. Because of singularity problem, above dynamics can't be properly solved using general backstepping method although it is in a well known strict-feedback form. Furthermore, the dynamics is in an...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.