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Trajectory simulation is a tool to compute the flight path and flight parameters of the munition after them been launched. The paper presents an ontology-based methodology which could be used in trajectory simulation development. Domain engineering principles, knowledge and practices have been reused in build the trajectory simulation ontology and build a platform independent framework based on the...
Simulation results showed that the models which consist of the pillar array structure induced more droplet collisions than those models constructed by the circle block, semi-circle block, ellipsoid block, and bevel fins, and avoided the deflection of the droplets which was revealed in the serpentine model. In addition, within the VLM chip, the wall temperature was much higher than the fluid temperature...
Recently, synthesis of gene regulatory networks having desired behavior has become of interest to many researchers and several studies have been done. There exist periodic phenomena in cells and these periodic phenomena are considered to be generated by gene regulatory networks. We already proposed a synthesis method of gene regulatory networks having desired cyclic expression pattern sequences. In...
Delay Tolerant Networks (DTNs) are occasionally-connected networks. They have high latency, long queuing time, limited resources and intermittent connectivity, which are different from traditional networks. Message Ferry (MF) scheme provides efficient data delivery for DTNs. In the MF scheme, nodes move proactively to send and receive messages. In this paper, we propose a ferry routing scheme for...
Trajectory generator is necessary in many inertial navigation research fields. The paper gives the design method of a trajectory generator, and deduces the control equation in detail, then classifies the flight track into four fundamental stages. The trajectory generator resolves the flight track, generates specific force, angular velocity and position signals etc. To check the trajectory generator,...
After the general principle and the calculation process of some localization algorithms of wireless sensor network being introduced and analyzed, a novel algorithm of mobile beacon trajectory is proposed in this paper. Since a static trajectory does not work well in non-uniform, and a virtual force trajectory has some defects like worse stability, a combination trajectory is proposed, which is a new...
Based on the analysis of the invariant set in quantum Lyapunov control under a performance index with degrees of freedom, the population control of eigenstates is studied. For isolated target eigenstates, this paper shows the existence of the degrees of freedom that guarantee exact convergence and obtains rigorous construction relation of those degrees of freedom. For non-isolated target eigenstates,...
Rehabilitation is the major therapy in stroke and spinal cord injured individuals. Robot-aided treadmill training has been applied for several years to assist, enhance and evaluate neurological and orthopedic rehabilitation. This paper presents a compliant patient cooperative control approach for Lower Extremity Rehabilitation Robot (LERR) with automatic gait adaption. Firstly, based on nonlinear...
A formation control approach for multiple robots in uncertain environments is proposed, which adopts the formation parameter matrix to establish the relative relationship among robots, decomposes the global-level formation control problem into the-off-axis point of the follower tracking the-off-axis point on the virtual robot which has the same orientation with the lead robot and maintains a desired...
Iterative Learning Control (ILC) is a practical control methodology which can “learn” from the experience gained from past iterations. ILC has been widely used in many industrial repetitive processes and has shown its potential in achieving perfect tracking performance. This paper focuses on time-varying cascade systems with two sub-systems. An ILC algorithm is available for each sub-system to ensure...
This paper demonstrates how to commission specific protection functions using COMTRADE—an IEEE standard for common format for transient data exchange. The following are required to generate a specific test: • detailed test plan • COMTRADE records 1Each detailed test plan should provide a complete explanation of the test as well as step-by-step instructions on performing the test. Each detailed test...
Aim at performance downgrade of loitering detection in the case of motion target being motionless of short duration or multiple targets having crisscross motion, furthermore, loitering detection pays more attention to trajectory of motion target than itself, so this paper proposed a method of video loitering detection based on dynamic programming. First, we extract characteristic points from every...
Localization is a vital foundation in Wireless Sensor Networks (WSNs). However, most previous localization methods assume an idealistic radio propagation model that is far from reality. This will lead to inaccurate localization, since unknown nodes cannot receive enough location messages under the radio irregularity model. In our previous work “LMAT”, we solved the path planning problem of the mobile...
This paper presents the design of a Q-Band helix-traveling wave tube (TWT). The simulation of electron gun, focusing magnetic system, the beam-wave interaction and a four-stage depressed collector is carried out and the results show that the design can satisfy the power goal of 200W and a 50% total efficiency.
Simulation of the millimeter and submillimeter wavelengths generator — klinoorotron with inclinated radial electronic beam is carried out. In this device the plane radial electron beam shaped in a ring electronic gun, is deposited under a small corner at the slowing waves system executed as a radial comb on a mirror of the open resonator. By it will be achieved klinoorotron effect due to which all...
In general, Gantry-type precision stages have low resonance modes because the structure of the stages are large and complex. These resonance modes cause a pitch motion during the translation driving. In this paper, an optimal mechanical parameter design method is analyzed and explored via a two-inertia model. In these modes, primary resonance can be suppressed by Self Resonance Cancellation (SRC)...
Legged robots have significant advantages over other types of mobile robots when task at hand requires the robot to overcome obstacles. This paper presents a reference trajectory generation method for a quadruped robot for pace gait on a flat surface. The approach is based on the Zero Moment Point (ZMP) stability criterion and the Linear Inverted Pendulum Model (LIPM). ZMP reference trajectories for...
In this paper, the application of Particle Swarm Optimization (PSO) on the optimization of the membership functions and the sliding surface constants of the decentralized fuzzy sliding mode controller (FSMC) is presented. This technique is used in order to find an optimal, decentralized, intelligent controller for a nonlinear aerodynamic, Twin Rotor Multi-input, multi-output System (TRMS). Simulation...
This paper employs a nonlinear disturbance observer (DOB), developed recently, to design a robust trajectory tracking controller for quadrotors. We prove that the proposed controller recovers the performance of the nominal closed-loop system under parameter uncertainties and disturbance torques. The results are validated through simulations and compared with a previous approach.
There exist periodic phenomena in cells and the phenomena are considered to be generated by gene regulatory networks. Therefore synthesis of gene regulatory networks having desired periodic behavior has become of interest to many researchers. In this paper, we discuss a synthesis problem of gene regulatory networks having desired periodic behavior. The desired behavior are given by cyclic expression...
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