In this paper we investigate the finite horizon linear quadratic regulation (LQR) problem for a linear continuous time system with time-varying delay in control input and a quadratic criterion. We assume that the time-varying delay is of a known upper bound, then the LQR problem is transformed into the optimal control problem for systems with multiple input channels, each of which has single co...

Linear Quadratic Gaussian (LQG) control has a known analytical solution [1] but non-linear problems do not [2]. The state of the art method used to find approximate solutions to non-linear control problems (iterative LQG) [3] carries a large computational cost associated with iterative calculations [4]. We propose a novel approach for solving nonlinear Optimal Control (OC) problems which combin...

The rocket is the only vehicle that launches the spacecraft in the space. The orientation of the spacecraft in precise position is so crucial. But, the motion of the rocket can be influenced by internal and external disturbances. Furthermore, the rocket is a multi-input and multi-output nonlinear system whose dynamics are unstable and poorly understood. Hence, attitude control of the rocket is ...

We address model-free distributed stabilization of heterogeneous continuous-time linear multi-agent systems using reinforcement learning (RL). Two algorithms are developed. The first algorithm solves a centralized quadratic regulator (LQR) problem without knowing any initial stabilizing gain in advance. second builds upon the results algorithm, and extends it to with predefined interaction grap...

A closed-loop controller was proposed to adjust the laser power maintain melt pool stability based on linear quadratic regulator (LQR) control theory. The width acquisition system built complementary metal oxide semiconductor (CMOS), and captured image processed using an processing algorithm obtain width. used as input variable output variable. state space spatial model identified subspace meth...

Autonomous underwater vehicle (AUV)is a non-linear dynamic system which is modelled with six degree of freedom equation. Due to hydrodynamic forces these equations are complex nonlinear and highly coupled, hence impractical for implementing controllers. Here, a reduced order subsystem derived from dive plane parameter for depth control has been linearized and is used for controlling scheme. The...

Abstract The problem of stabilization of vertical, lateral and longitudinal dynamics for hover flight mode of an unmanned autonomous helicopter (UAH) in a gusty environment is considered. The controller design is based on a generic linear model which successfully describes the behavior of most small scale helicopters. A recursive (backstepping) design procedure is used to design the robust cont...

We consider an inventory-production system where items deteriorate at a constant rate. The objective is to develop an optimal production policy that minimizes the cost associated with inventory and production rate. The inventory problem is first modeled as a linear optimal control problem. Then linear quadratic regulator (LQR) technique is applied to the control problem in order to determine th...

This paper presents research on a permanent magnet synchronous motor (PMSM) by 5-level T-type inverter using linear quadratic regulator (LQR) control for speed control. The space vector modulation (SVM) structure the to improve quality of PMSM drive system is presented. aims successfully design state feedback controller in system. Simulink results are performed with different ranges and same to...

AbstractThis paper considered the problem of stabilization of longitudinal and lateral dynamics of an unmanned autonomous helicopter (UAH) for hovering flight mode in a gusty environment. The controllers design is based on generic linear model which successfully describe the behavior of most smallscale helicopters. A backstepping design procedure is used to design the adaptive controller for lo...