It is well known that unconstrained infinite-horizon optimal control may be used to construct a stabilizing controller for nonlinear system. We show similar stabilization results achieved using finite horizon control. The key idea approximate the tail of infinite cost-to-go using, as terminal cost, an appropriate Lyapunov function. Roughly speaking, function (CLF) should provide (incremental) upper bound on cost. In this fashion, important stability characteristics retained without use...

An adaptive dynamic surface control (DSC) scheme is proposed for the multi-input and multi-output (MIMO) attitude motion of near-space vehicles (NSVs) in presence external disturbance, system uncertainty input saturation. The disturbance are efficiently tackled using a Nussbaum observer (NDO), controller constructed by combining technique to handle problem "explosion complexity" inherent conventional backstepping method. For handling saturation, an auxiliary designed with same order as that...

In the present research, energy flow of electric vehicle batteries under different environmental temperatures was experimentally examined in a climate chamber. The characteristics, loss conditions, and critical components’ operating conditions working efficiency were comparatively analyzed. test results show that temperature has profound impact on an vehicle’s performance conditions. driving mileage tested at −7 °C, 23 35 °C found to be 162.89 km, 256.09 198.69 respectively. does not have...

Voltage control generally requires accurate information about the grid's topology in order to guarantee network stability. However, identification is challenging for existing methods, especially as grid subject increasingly frequent reconfiguration due adoption of renewable energy. In this work, we combine a nested convex body chasing algorithm with robust predictive controller achieve provably finite-time convergence safe voltage limits online setting where there uncertainty both well load...

This study explores the relationship between volunteers' psychological capital and their commitment to volunteering. We tested whether had a positive predictive effect on volunteering this was mediated by organizational commitment, role identification, or perceived social support. A sample of 1165 volunteers who were registered in national volunteer service information system China recruited study. The results showed significant capital, volunteering, support, commitment. Volunteers' not...

We investigate the problem of stabilizing an unknown networked linear system under communication constraints and adversarial disturbances. propose first provably algorithm for problem. The uses a distributed version nested convex body chasing to maintain consistent estimate network dynamics applies level synthesis determine controller based on this estimated model. Our approach avoids need identification accommodates broad class delay while being fully scaling favorably with number subsystems.

A Comparative Study on Strength between American College Male and Female Students in Caucasian Asian Populations Muscle strength has been considered as a major factor sport performance, martial arts competitions, self-defense, other physical activities. The purpose of the study was to investigate potential difference muscle male female college students. results indicated that students is significantly lower than arm, upperbody chest, shoulder, leg, abdominal. Females have 37-68% males...

In order to improve smoothness of task trajectories, this paper describe algorithms generate smooth-optimal trajectories based on the differential flatness quadrotor. B-spline is used parameterize selected flat outputs, and dynamic constraints or kinematical quadrotor are transferred control point B-spline. The trajectory generation then considered an optimal problem by adopting integral squared jerk. And solution solved transforming into a nonlinear programming problem. At last...

Direct digital manufacturing (DDM) is the creation of a physical part directly from computer-aided design (CAD) model with minimal process planning and typically applied to additive (AM) processes fabricate complex geometry. AM preferred for DDM because its user input requirements; as result, users can focus on exploiting other advantages AM, such intricate mechanisms that require no assembly after fabrication. Such free be created using during single build process. In contrast, subtractive...

We present a novel class of nonlinear controllers that allows interpolation among differently behaving linear as case study for recently proposed Linear and Nonlinear System Level Synthesis framework. The structure the controller simultaneously satisfying performance safety objectives defined small- large-disturbance regimes. is distributed, handles delays, sparse actuation, localizes disturbances. show our always outperforms its counterpart constrained LQR problems. further demonstrate...

An integrated buffer sizing approach is proposed, considering the activity duration distribution, resource impact factor and of feeding chain. The influence multiresource constraints utilization are considered in calculation. Based on activities safety time estimated by Monte Carlo simulation. Besides, an improved method calculating remaining chain which adds into project buffer. Finally, a numerical example shown to verify that reasonable reduce risk schedule can shorten planned project.

Voltage control generally requires accurate information about the grid's topology in order to guarantee network stability. However, identification is a challenging problem for existing methods, especially as grid subject increasingly frequent reconfiguration due adoption of renewable energy. Further, running mechanisms with incorrect may lead unstable control. In this work, we combine nested convex body chasing algorithm robust predictive controller achieve provably finite-time convergence...

It is well known that unconstrained infinite horizon optimal control may be used to construct a stabilizing controller for nonlinear system. In this paper, we show similar stabilization results achieved using finite control. The key idea approximate the tail of cost-to-go using, as terminal cost, an appropriate Lyapunov function (CLF). We provide complete analysis stability and region attraction/operation properties receding strategies utilize approximations in proposed class. shown...

This paper described a nonlinear trajectory generation (NLTG) algorithm to generate smooth optimal trajectories based on the differential flatness of quadrotor. Expressing all states and inputs quadrotor with set outputs their derivatives, designing effective in flat out space while considering dynamic constraints environmental constraints, was then considered an control problem. B-spline used parameterize selected outputs, solution solved by transforming problem into programming At last...