Aimed at the flight control problem of a near-space vehicle (NSV) with uncertainties such as parameter perturbation and external disturbance, novel dynamic surface (DSC) method high-order linear extended state observer (HLESO) compensation is proposed in this paper. In method, tracking differentiator (TD) based on an inverse hyperbolic sine function firstly designed, convergence TD also analyse...

To improve the speed control performance of a diesel engine, active disturbance rejection controller (ADRC) is designed by adding an arranging transition process to traditional PID controller, extracting differential signals reasonably, and adopting nonlinear combination error signals. The ADRC composed tracking differentiator (TD), extended state observer (ESO), feedback (NLSEF). Such construc...

This paper proposes an improved back-stepping control approach and its application to small nonlinear UAV systems with uncertainties such as external disturbance. Unlike traditional methods, the idea of prescribed performance function (PPF) is incorporated into design, that both transient steady-state can be strictly guaranteed. Moreover, we design a novel tracking differentiator avoid “differe...

LFM signals are widely applied in radar, communication, sonar and many other fields. received by these systems contain a lot of noise outliers. In order to suppress the interference strong impulse on target realize accurate estimation signal parameters, echo need be filtered. this paper, solve problem poor performance parameter based fractional Fourier transform noise, alpha stable distribution...

In this short note, we present the analog realization of a fractional-order differentiator of order α = 1/2 in 0.35 μm CMOS technology.

Abstract Aiming at the challenges to accurate and stable heading control of underactuated unmanned surface vehicles arising from nonlinear interference caused by overlay interaction multi interference, also uncertainties model parameters, a algorithm for an vehicle based on improved backpropagation neural network is proposed. Based applying optimization theory realize that tracks desired yaw an...

The foundational theory of differentiation was developed as part of the original release of ACL2(r). In work reported at the last ACL2 Workshop, we presented theorems justifying the usual differentiation rules, including the chain rule and the derivative of inverse functions. However, the process of applying these theorems to formalize the derivative of a particular function is completely manua...

We propose and experimentally demonstrate a temporal differentiator in optical field based on a silicon microring resonator with a radius of 40 microm. The microring resonator operates near the critical coupling region, and can take the first order derivative of the optical field. It features compact size thus is suitable for integration with silicon-on-insulator (SOI) based optical and electro...

−57− This paper explores the use of Ultra-Wideband (UWB) radar for tracking multiple moving humans. Because the ability to track human movement is useful for the wide range of security and safety applications, a number of technologies have been pursued for human tracking. Computer vision has limited performance in poor visibility conditions, while the performance of infrared imagers can be temp...