Design and co-simulation of a nose wheel steering system for a civil aircraft

2021 ◽  
pp. 095441002110317
Author(s):  
Dawei Li ◽  
Mingxing Lin ◽  
Tao Zhang
Keyword(s):  
Hydraulic System ◽  
Steering System ◽  
Air Transport ◽  
Design Parameters ◽  
Control Law ◽  
System A ◽  
Steering Mechanism ◽  
Civil Aircraft ◽  
Design Requirements ◽  
The Mathematical Model

In order to automate the ground maneuvering of a civil regional aircraft and improve the efficiency of the air transport system, a fly-by-wire nose wheel steering system (NWSS) was designed. A rack and pinion steering mechanism integrated with a single actuator mechanism was proposed. The basic control circuit diagram with integrated test, the electro-hydraulic system diagram, and the mathematical model of the steering system were established and analyzed. A co-simulation model of the system was built to verify the control law. The results show that the properties of the prototype meet the design requirements. Given the importance of the NWSS, the simulation results can be used to optimize the basic design parameters. This methodology can also be used for other types of aircraft.

scholarly journals Design and Test of Dual Actuator Nose Wheel Steering System for Large Civil Aircraft

2016 ◽  
Vol 2016 ◽  
pp. 1-14 ◽  
Author(s):  
Ming Zhang ◽  
Rongmin Jiang ◽  
Hong Nie
Keyword(s):  
Servo System ◽  
Steering System ◽  
Design Parameters ◽  
Hydraulic Pressure ◽  
Test Results ◽  
Handling Characteristics ◽  
Steering Mechanism ◽  
Civil Aircraft ◽  
Ground Handling ◽  
Electrohydraulic Servo System

In order to improve aircraft ground handling characteristics and airport working efficiency, large handling angle and torque are requested for the nose wheel steering system of large civil aircraft. A following swivel selector valve is firstly designed to meet the demand for the hydraulic pressure commutating as soon as the dual actuator nose wheel steering mechanism passes through its dead center position. Considering the multiple objective functions of nose wheel steering mechanisms, those core design parameters are multiobjective optimized. A nose wheel steering electrohydraulic servo system with handling and antishimmy functions is designed for the steering mechanism. Then the prototypes of the steering mechanism and electrohydraulic servo system are researched to validate the design. Using the swing actuator to provide the load torque and ground excitation, the steering test bench is prepared to test the system working. The steering test and the antishimmy test are conducted to verify the functions of the system. The test results, such as steer angle, steer torque hydraulic pressure, and antishimmy torque, are analyzed in detail and compared with the theoretical results. The results show that the property of the prototype achieves the design objectives, such as work mode, steer angle, and steer torque.

scholarly journals Genetic Algorithm-Based Tuning of Backstepping Controller for a Quadrotor-Type Unmanned Aerial Vehicle

Electronics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 1735
Author(s):  
Omar Rodríguez-Abreo ◽  
Juan Manuel Garcia-Guendulain ◽  
Rodrigo Hernández-Alvarado ◽  
Alejandro Flores Rangel ◽  
Carlos Fuentes-Silva
Keyword(s):  
Genetic Algorithms ◽  
Unmanned Aerial Vehicle ◽  
Control Technique ◽  
Design Parameters ◽  
System Response ◽  
Control Law ◽  
Self Tuning ◽  
Aerial Vehicle ◽  
Design Requirements ◽  
Backstepping Controller

Backstepping is a control technique based on Lyapunov’s theory that has been successfully implemented in the control of motors and robots by several nonlinear methods. However, there are no standardized methods for tuning control gains (unlike the PIDs). This paper shows the tuning gains of the backstepping controller, using Genetic Algorithms (GA), for an Unmanned Aerial Vehicle (UAV), quadrotor type, designed for autonomous trajectory tracking. First, a dynamic model of the vehicle is obtained through the Newton‒Euler methodology. Then, the control law is obtained, and self-tuning is performed, through which we can obtain suitable values of the gains in order to achieve the design requirements. In this work, the establishment time and maximum impulse are considered as such. The tuning and simulations of the system response were performed using the MATLAB-Simulink environment, obtaining as a result the compliance of the design parameters and the correct tracking of different trajectories. The results show that self-tuning by means of genetic algorithms satisfactorily adjusts for the gains of a backstepping controller applied to a quadrotor and allows for the implementation of a control system that responds appropriately to errors of different magnitude.

Optimization Design for the Diaphragm Spring of Automobile Clutch

2014 ◽  
Vol 889-890 ◽  
pp. 268-271
Author(s):  
Cui Xia Guo ◽  
Hong Zhi Zhang
Keyword(s):  
Optimization Design ◽  
Elastic Characteristic ◽  
Basic Structure ◽  
Design Parameters ◽  
Element Analysis ◽  
Design Cycle ◽  
Overall Performance ◽  
Design Requirements ◽  
The Cost ◽  
The Mathematical Model

The diaphragm spring is the key element in modern automobile clutch. Its elastic characteristic affects the overall performance of the clutch. Taking a car as an example, According to the design requirements and characteristics, it was to establish the mathematical model of optimum design of automobile clutch diaphragm spring. It was to optimize the design parameters of the basic structure of the diaphragm spring by using the MATLAB optimization toolbox. It did finite element analysis for the 3D modeling using ANSYS software. The results show that: it can be obtained more reasonably of the diaphragm spring elastic curve by the optimal design, shorten the design cycle, reduce the cost of.

Dynamic Simulation of Hydro-Mechanical Differential Turning Hydraulic System of Tracked Vehicle

2009 ◽  
Vol 628-629 ◽  
pp. 77-82 ◽  
Author(s):  
Zhi Li Zhou ◽  
F.Y. Cao ◽  
L.Y. Xu
Keyword(s):  
Hydraulic System ◽  
Optimization Design ◽  
Structural Parameters ◽  
Dynamic Performance ◽  
System Optimization ◽  
Design Parameters ◽  
Tracked Vehicle ◽  
And Performance ◽  
The Mathematical Model ◽  
Turning System

Being an important subsystem of hydro-mechanical differential turning system of tracked vehicle, the turning hydraulic system plays the crucial role on turning and running performance of tracked vehicle. The mathematical model and simulated model of turning hydraulic system are established. The dynamic performance of different running parameters and structural parameters of certain tracked vehicle is simulated and analyzed adopting Runge-Kutta four, five step arithmetic in this paper. The theory basis of system optimization design, parameters match and performance analysis of hydro-mechanical differential turning system is provided.

Modeling and Simulation on Four-Way Valve Control Motor System of Cable Car Reel

2011 ◽  
Vol 299-300 ◽  
pp. 832-835
Author(s):  
Jun Mao ◽  
Guo Wei Mo
Keyword(s):  
Hydraulic System ◽  
Motor System ◽  
System Analysis ◽  
Servo Control ◽  
Design Parameters ◽  
Math Model ◽  
Servo Control System ◽  
Design Requirements ◽  
Valve Control ◽  
Design And Testing

In the cable car work process, the performance of valve control motor system directly influences the drum controlling accuracy and stability. In order to analyze the dynamic characteristic of servo hydraulic system and optimal design parameters, cost reduction and shortened product development cycles. Aiming at the cable car valve control motor major components of hydraulic system are analyzed, establishment of the math model, and deduces the transfer function. Using matlab software of system analysis of time domain. The results show that the system well meet the design requirements, and has good stability, and to the cable car drum the servo control system design and testing has laid a solid theoretical foundation.

scholarly journals Simulation of the hydraulic system of a device with self-adaptation for power and kinematic parameters on the working body

2021 ◽  
Vol 21 (1) ◽  
pp. 55-61
Author(s):  
T. A. Khinikadze ◽  
A. T. Rybak ◽  
P. I. Popikov
Keyword(s):  
Mathematical Model ◽  
Hydraulic System ◽  
Adaptive Systems ◽  
Dynamic Properties ◽  
Hydraulic Drive ◽  
Operating Conditions ◽  
Design Parameters ◽  
Rock Drilling ◽  
Self Adaptation ◽  
The Mathematical Model

Introduction. Currently, Russia has adopted a course towards the creation of intelligent machines and equipment. The same holds for mobile technological machines for road construction and public utilities. Therefore, the design and creation of this type of actuators with a self-adaptation function is a critical task.Materials and Methods. A device equipped with a hydraulic drive with self-adaptation to load and coordination of kinematic and power parameters of the principal motion and the feed movement of the working body of the rock- drilling rig, is presented. To study and design the device based on the mathematical modeling methods of a hydraulic drive and adaptive systems, a mathematical model is proposed. It is developed using the foundations of the theory of volumetric stiffness of hydraulic systems. This enables to accurately describe the impact of the dynamic properties of the hydraulic system (compressibility of the working fluid, elastic properties of pipelines, high-pressure  hoses, hydraulic apparatuses) on the dynamic properties of the system as a whole.Results. The mathematical model for a device with self-adaptation includes submodels of adaptive communication, interrelations of power, kinematic and process parameters of rock drilling, as well as mathematical description of the movement of system elements. The solution to the developed mathematical model was performed in the software environment for dynamic modeling of technical systems SimInTech. As a result, general dependences of the adaptive system on the design parameters of the system and the operating conditions are obtained.Discussion and Conclusion. The mathematical model of the presented device shows the fundamental possibility of implementing the principle of self-adaptation in terms of load under external and internal disturbing actions during operation. The results obtained can be used under designing adaptive systems of other technological equipment, for example, for the implementation of deep drilling in workpieces with variable properties in its depth.

Modeling and Analysis of a Self-Steering Axle for Heavy Vehicles

2018 ◽  
Author(s):  
Damon Delorenzis ◽  
Beshah Ayalew
Keyword(s):  
Steering System ◽  
Design Parameters ◽  
Heavy Vehicles ◽  
Vehicle Performance ◽  
Modeling And Analysis ◽  
Damping Characteristics ◽  
Traditional Design ◽  
Steering Mechanism ◽  
Stiffness And Damping ◽  
Market Pressures

Self-steering axles installed on commercial (heavy) vehicles offer important benefits, including improvements to vehicle performance such as off-tracking reduction and improved maneuverability, as well as reduction in pavement wear and damage that otherwise can result from the operation of heavy vehicles on the roadway. Traditional design methods for self-steering axles include empirical and trial-and-error methods to set steering mechanism design parameters based on known design baselines and prior experience. While the design of self-steering axles has not changed very much since their introduction, increasingly regulations and competitive market pressures have promoted the need for new designs to improve the performance of self-steering axles and differentiate new product offerings such as a new integrated steering knuckle concept which provides steering return stiffness and damping using a non-traditional design. This paper introduces models useful in the analysis of the steering return stiffness and damping performance of self-steering axle systems and shows how to identify the steering stiffness and damping characteristics that provide acceptable performance for these systems. The paper offers reduced order models that capture the self-steering axle’s shimmy behavior and discusses how to arrive at acceptable steering and damping characteristics. It presents results of the evaluations of the steering system performance including with comparisons between physical testing and simulations with a self-steering axle installed on a commercial vehicle.

An Application and Analysis for Regulation of Hydraulic System

2011 ◽  
Vol 328-330 ◽  
pp. 2419-2422
Author(s):  
Wei Sun ◽  
Cheng Yan Fan ◽  
Zhi Peng Sun
Keyword(s):  
Machine Tool ◽  
System Design ◽  
Hydraulic System ◽  
Reducing Power ◽  
Transmission Efficiency ◽  
Actual Application ◽  
System A ◽  
Special Machine ◽  
Design Requirements ◽  
Hydraulic System Design

In the actual application of the hydraulic system, a system often can’t be fully realized the design requirements, or some performance indicators are below the expectations of the system design. From some analyses, sometimes the reason is not a hydraulic system design, but the problem of regulation of the hydraulic system.It is frequently encountered problems in the hydraulic system of actual work that hydraulic system right regulation. Based on analysis of the hydraulic system by combined machine tool, hydraulic system of hydraulic elevator and special machine tool, explaining that the regulation of hydraulic system is essential to guarantee design requirements of system, reducing power loss, raise transmission efficiency and the further improvement for work properties. It should be paid sufficient attention to the regulation of system when the hydraulic system is running.

Optimization of the Hinge Point Position of Luffing Mechanism in Reach Stacker for Container

2013 ◽  
Vol 694-697 ◽  
pp. 142-147 ◽  
Author(s):  
Ming Hua Tian ◽  
Shi Cheng Hu
Keyword(s):  
Hydraulic System ◽  
Force Analysis ◽  
Point Position ◽  
The Core ◽  
Hinge Point ◽  
System A ◽  
Optimization Calculation ◽  
Comprehensive Performance ◽  
Hinge Points ◽  
The Mathematical Model

The luffing mechanism of reach stacker is the core of big arm lifting mechanism. The hinge point position in it influences directly the comprehensive performances. The mathematical model of three hinge points was established through the force analysis of luffing mechanism, which aims to reduce the maximum force of hydro-cylinder and decrease the oil pressure of hydraulic system. A hierarchical ordering method was utilized to optimize the multi-objective problem. The optimization calculation was presented by using the genetic algorithm in Matlab. Experimental results indicate that the optimization enhance the comprehensive performance of reach stacker. And this also provides important foundation to the parameters design of luffing mechanism.

PROJECT ON ELECTRONIC STEERING SYSYTEM

2018 ◽  
Vol 4 (5) ◽  
pp. 7
Author(s):  
Shivam Dwivedi ◽  
Prof. Vikas Gupta
Keyword(s):  
Steering System ◽  
Essential Elements ◽  
Variable Pressure ◽  
Passenger Cars ◽  
Control Techniques ◽  
Steering Mechanism ◽  
Dynamics And Control ◽  
Active Research ◽  
Electronic Steering ◽  
And Control

As the four-wheel steering (4WS) system has great potentials, many researchers' attention was attracted to this technique and active research was made. As a result, passenger cars equipped with 4WS systems were put on the market a few years ago. This report tries to identify the essential elements of the 4WS technology in terms of vehicle dynamics and control techniques. Based on the findings of this investigation, the report gives a mechanism of electronically controlling the steering system depending on the variable pressure applied on it. This enhances the controlling and smoothens the operation of steering mechanism.

Sign in / Sign up

Export Citation Format

Share Document