Dear Editor, This letter addresses the resilient model predictive control (MPC) problems for adaptive cruise (ACC) systems under sensor attacks. In light of vulnerabilities ACC to attacks, an intrusion detection mechanism is proposed at controller side distinguish abnormal data. Then, robust gains are derived design terminal region constraint MPC. Further, improved event-triggered scheme presented, which shows ability relieve computation burden in implementation MPC, by combining...

This article proposes a modeling method for the fully closed-loop system of hemispherical resonator gyroscope (HRG) under force-to-rebalance mode. A consists two parts: driving loop and detecting loop. First, dynamic equations are derived to obtain vibration differential driven by electrostatic forces, further accurate output models wave amplitude angular rate, which establishes model Next, is analyzed clarify relationship between voltage amplitude. Simultaneously, influences interference...

Vibratory gyroscopes are the most ideal inertial sensors in 21st century. The amplitude is an important index of vibratory gyroscopes. This article investigates asynchronous tracking control approach for signals Since manufacturing error can result stochastic signal amplitude, Markov systems adopted to approximate Because results jitter, a novel doubly fed controller with stability performance proposed reducing jitter. In practical application, regarding known degree process, partially...

The Hemispherical Resonator Gyro (HRG) is a solid-state and widely used vibrating gyroscope, especially in the field of deep space exploration. flat-electrode HRG new promising type gyroscope with simpler structure that easier to be fabricated. In this paper, cover shortage classical generalized Coriolis Vibration Gyroscope model whose parameters are hard obtain, established by equivalent mechanical model, motion equations unideal hemispherical shell resonator deduced, calculation results...

In this study, a graphene oxide (GO)/zinc (ZnO)/hydroxyapatite (nHAp) composite coating was constructed on pure titanium surface by microarc oxidation (MAO) pretreatment combined with hydrothermal technology (HT), thereby making it possible to explore the performance optimization of for Ti-based implants. Scanning electron microscopy (SEM), an energy dispersion spectrometer (EDS), Fourier transform infrared spectroscopy (FTIR), Ramam (Ramam), etc., confirmed that GO/ZnO/nHAp composites were...

The hemispherical resonator gyroscope (HRG) is a typical capacitive Coriolis vibratory whose performance inevitably influenced by the uneven electrostatic forces caused excitation capacitance gap between and outer base. First, mechanism of due to significantly in that non-uniformity can cause irregular deformation further affect precision HRG, was analyzed. According analyzed influence mechanism, dynamic output error model HRG established. In this work, effect first four harmonics on...

Hemispherical shell resonator is the key component of hemispherical gyro (HRG). The finite element model HRG established based on dynamic equation with ANSYS. natural frequency and correlative vibration mode calculated by proposed model. On theoretical analysis, influence law structural parameters characteristic obtained. optimization to guide parameters. Theoretical simulative results show that can be applied conduct optimal structure design resonator. It provides basis parametric reference for

This article develops a new filtering strategy for discrete-time Markov jump nonlinear systems approximated via piecewise-affine (PWA) model. Motivated by the existence of certain partitioned regions that system state cannot enter within one time step, an algorithm calculating reachable target is provided from currently located region allowing bounded disturbance. Then, we analyze stochastic stability with desired disturbance-attenuation performance index resulting error (FES) eliminating...

Abstract Interval type‐2 fuzzy Markov jump systems (IT2FMJSs) have received much attention because they can well describe complex nonlinear with uncertainties and stochastic system mode switching. However, the transition probabilities of MJSs (FMJSs) been assumed to be completely known, limiting real‐world applications existing results. Different from previous studies, between modes switching are partially unknown, packet dropouts data transmission uncertain in this study. Compared main...

This paper presents an analysis of effect external load on hemispherical resonator gyroscope (HRG) feedback control system with state constraint. Firstly, the analytical solution dynamic equation under multi-electrode excitation is obtained based equations in second-order resonant state. Through analysis, two main reasons that influences HRG are got. (1) The change relative position actuator electrodes and results from deformation resonator. (2) initial electrode gap changed. Then, precise...

The weapon target assignment (WTA) is a classical problem of defense-related applications which proved to be NP-complete problem. In this paper, practical and available dynamic (DWTA) formulation given incorporates two meaningful conflicting objectives, that is, minimizing costs maximizing combat benefits. As we know, heuristic methods have some shortcomings such as slow convergence speed local optimum in solving the nonlinear integer optimization To end, novel DWTA algorithm based on...

Abstract. In this study, the empirical orthogonal function (EOF) decomposition technique was utilized to analyze similarities and differences of spatiotemporal characteristics between total electron content (TEC) International GNSS Service global ionospheric map (GIM) that derived from Reference Ionosphere 2016 (IRI-2016) model in 2013. Results showed main spatial patterns time-varying features data set have good consistency. The following four variation can be extracted both sets through...

For any Coriolis vibratory gyroscopes, symmetrically perfect resonator is their core component. In order to analyze the influence of non-uniform elasticity modulus on natural frequency in resonator, finite element model hemispherical established by using analysis software (ANSYS). The second-order ideal and with elastic analyzed. relationship between established. first fourth harmonics along circumferential direction are mainly investigated that dominates amplitude uneven modulus. harmonic...