Abstract The issue of asymmetric field-of-view constraints for a seeker head positioned in the side window hypersonic vehicle is addressed. A mathematical model seeker’s 3D field view under side-window detection conditions first established, along with process constraints. Based on this, variation when attacking stationary targets analyzed. To address losing target terminal phase due to constraints, novel guidance scheme proposed by introducing virtual and planning trajectory. While this may...

Summary This paper presents a fixed‐time cooperative guidance law for leader‐following missiles, comprising one leader missile with the target seeker and several seeker‐less follower missiles. The aim is to achieve simultaneous attack on maneuvering at desired impact angles. First, angle control against proposed based nonsingular fast terminal sliding mode (NFTSM) algorithm. Then, design of missiles composed two parts: along follower‐to‐leader line sight (LOS) direction, command derived from...

A guidance law parameter identification model based on Gated Recurrent Unit (GRU) neural network is established. The scenario of the that an incoming missile (called missile) attacks a target aircraft aircraft) using Proportional Navigation (PN) law. viewed as regression problem in this paper rather than classification problem, which means assumption finite set possible results discarded. To increase training speed and obtain nonlinear mapping relationship between kinematic information...

In this article, a highly nonlinear trajectory optimization problem for reentry vehicles is rapidly solved by the proposed modified sequential convex programming (MSCP) method. A logarithm linearization approach to decouple dynamics of high order and nonconvex path constraints heat rate, dynamic pressure, normal load. Next, model including no-fly zone constraint, objective function are convexified with first-order Taylor series expansion. Subsequently, continuous-time optimal converted an...

To accurately estimate the state of incoming missile and effectively implement an evasion maneuver, parameters missile, including a guidance constant first-order lateral time constant, should be identified online. this end, assuming that with proportional navigation (PN) law attempts to attack aerial target bang-bang maneuvers, parameter identification model based on gated recurrent unit (GRU) neural network is built in paper. The analytic solutions for are derived show latter more...

This article focuses on the analysis of generalized control coupling effect spinning guided projectiles. A concept so-called equivalent dynamics is first proposed in this to avoid nonlinearity and facilitate understanding for First, induced by an arbitrary-order dynamic formulated. Two useful theorems showing property are presented standby. Second, considering main elements involved loop, i.e., autopilot, actuator, inertial measurement unit, a comprehensive model frame established With aid...

Aiming at the problem that guided projectile is difficult to implement in-flight alignment of roll angle with low-cost gyroscope, this paper proposes an scheme based on pitch velocity vector caused by gravity. The relationship between rotation angular measured gyroscope and time established. In order avoid influence uncalibrated MEMS accuracy, error modeled included in equation. Then estimated compensated adaptive Adam algorithm. Consequently, accuracy can be effectively improved....

In order to solve the underdamping problem for a rolling missile, at first, design lateral acceleration autopilot; secondly, study projection of control command and strategy called pulse width modulation (PWM) in engineering, then damping loop this missile simulate system while inputting step signal. The digital simulation results indicate that autopilot can improve characteristics missile. Moreover, Three-axis turntable is employed attitude A Two-axis MEMS gyro fit on facility specific...

Abstract Accurate measurement and control of drilling fluid properties are crucial for safe successful operations. Traditional manual methods slow require significant manpower, underscoring the need real-time monitoring. This paper highlights a new online system monitoring fluids, enabling intelligent performance. The improves industry safety success by measuring accurate, timely, automated fluids. continuously measures ten essential parameters, including apparent viscosity, plastic yield...