Three-dimensional Large Landing Angle Guidance Based on Two-dimensional Guidance Laws

Li, Dou; Dou, Jiao

doi:10.1016/s1000-9361(11)60089-7

Cited by 5 publications

(7 citation statements)

References 10 publications

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“…The initial speed v 0 > 0, and the control inputs satisfy v 0 cos θ cos γ > bx d + ε (6) where ε > 0 is an proper constant such that the projectile can attain x d .…”

Section: Assumptionmentioning

confidence: 99%

“…The existing control methods for these problems are mainly based on the experience database [4] or numerical solution method [8] to determine the initial control inputs. In [6,17,28], the ballistic control problems are studied by incorporating continuous control inputs throughout the flying process. Such methods are inapplicable since the control inputs are only the initial states of the projectile in this paper.…”

Section: Introductionmentioning

confidence: 99%

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Initial states iterative learning for three-dimensional ballistic endpoint control

et al. 2016

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In this paper, an initial states iterative learning control algorithm is proposed for control of the ballistic endpoint displacement in three-dimensional space, where the target is moving and the projectile experiences system uncertainties. The characteristics of the three-dimensional ballistic process are formulated and explored, and the learning algorithm is proposed in the spatial domain. The algorithm consists of two parts. First, the initial speed and angles are iteratively learned to make the projectile attain a fixed position. Second, the shooting time is learned to tune the arrival time of the projectile. Since the dimensions of the solution space are larger than that of the task space, three control manners, including shooting speed, shooting angle and their combination, are researched respectively. Through rigorously analyzed, it is proved that the algorithm is convergent and the multiple initial states can be adjusted simultaneously. Finally, an example of practical cannonball projection is presented to verify the effectiveness of the proposed algorithms.

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“…The initial speed v 0 > 0, and the control inputs satisfy v 0 cos θ cos γ > bx d + ε (6) where ε > 0 is an proper constant such that the projectile can attain x d .…”

Section: Assumptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Initial states iterative learning for three-dimensional ballistic endpoint control

et al. 2016

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“…In practice, one 3D guidance law is often divided into two guidance laws applied to vertical and horizontal planes. 18,19 These planes are defined as the pitch plane and the yaw plane. The pitch plane is the orthogonal plane rotated by the angle l yaw and the yaw plane is taken as simply the horizontal XY plane.…”

Section: D Ubpn Guidance Equationsmentioning

confidence: 99%

Three-dimensional united biased proportional navigation law for interception of maneuvering targets with angular constraint

Yan

Zhao

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part G:

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Studying a guidance law, which can intercepts not only high-speed targets, but also low-speed targets with impact angle constrains, is a challenging task. In this paper, a new guidance law called united biased proportional navigation (UBPN) is proposed. The guidance law uses time-varying bias and navigation ratio, and incorporates the advantages of head-on and head-pursuit engagement. UBPN with positive time-varying navigation ratio can intercept low-speed targets which is a head-on engagement, while with negative time-varying navigation ratio can intercept high-speed targets, which is a headpursuit engagement. To begin with, planar UBPN guidance law is proposed and exact time-varying bias is derived. Moreover, the solution to the singularity in time-varying navigation ratio is given. Secondly, in order to realize the guidance law in three-dimensional space, we derive the relation between two-dimensional acceleration and threedimensional acceleration, and also give the solution for calculating the impact angle from two-dimensional surface into three-dimensional space. Finally, the simulation results of UBPN compared with proportional navigation, retroproportional navigation, and bias proportional navigation guidance law are shown. It is demonstrated that the miss distance and impact angle error can meet the guidance law requirements. Capture region of UBPN is given by simulation, which indicates that it is almost two times than that of the guidance law in the head-on engagement for interception of high-speed target.

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“…According to the armature reaction theory of electric machine [3,4], armature reactance is divided into quadrature-axis reactance aq X and direct-axis reactance ad X , ad X is less than aq X due to the special structure of the permanent magnet synchronous generator in the difference of air gap reluctance between quadrature-axis and direct-axis. Decreasing the voltage regulation rate by increasing the salient-pole ratio r aq ad K X X = in the condition of pure resistive load was introduced [5,6], but in strict meaning, this conclusion only fits to the condition of decreasing the ad X when the aq X being kept constant. By analytical method, Meng etc.…”

Section: Introductionmentioning

confidence: 99%

“…Experimental validate bases on the exterior voltage characteristic measuring data of a rare earth permanent magnet synchronous generator designed by Nanjing University of Aeronautics & Astronautics and introduced in literature[6]. The generator parameters were listed as follows…”

mentioning

confidence: 99%

Analysis for Impacts of Internal Impedance on the Load Characteristic of a Permanent Magnet Synchronous Generator

Shen

Zhang

Sheng

et al. 2013

AMR

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The load characteristic analysis of permanent magnet synchronous generator is presented. An internal impedance mathematic model of the generator was built with phasor analysis method for analyzing the relationship between exterior voltage characteristic or voltage regulation rate, active power and armature reactance. The research results demonstrated that the internal impedance of generator has both current and power factor angle negative feedback characteristic, which makes the voltage regulation rate be improved to a certain extent and the improved effect lying on both the direct-axis armature reactance under condition of an inductive load and the quadrature-axis armature reactance under resistive load. Additionally, an optimal range of the armature reactance being of less voltage regulation rate was determined according to numerical calculation and analysis. An experimental result based on the experimental measurement and data analysis of exterior voltage characteristic corresponds to the theoretical calculation demonstrated the correctness of the research model based upon the armature reaction analysis. Those can provide the theoretically guidance to the electromagnetic design of permanent magnet generator.

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Three-dimensional Large Landing Angle Guidance Based on Two-dimensional Guidance Laws

Cited by 5 publications

References 10 publications

Initial states iterative learning for three-dimensional ballistic endpoint control

Initial states iterative learning for three-dimensional ballistic endpoint control

Three-dimensional united biased proportional navigation law for interception of maneuvering targets with angular constraint

Analysis for Impacts of Internal Impedance on the Load Characteristic of a Permanent Magnet Synchronous Generator

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