Measuring Theory Research on the Automobile Steering Angle Automatic Measuring System

2013 ◽  
Vol 655-657 ◽  
pp. 731-734
Author(s):  
Hu Dai Fu ◽  
Zheng Zhong Wang
Keyword(s):  
Steering System ◽  
Measuring System ◽  
Test Results ◽  
Automatic Measuring ◽  
Steering Angle ◽  
Turning Radius ◽  
Minimum Turning Radius ◽  
Theory Research ◽  
Infrared Tracking ◽  
Measuring Plate

It is studied that a great proportion of traffic problems lies in vehicles’ steering system, and the maximum steering angle decides their steering capability and their minimum turning radius. The measuring principle of rapid measuring system, and the automatic tracking principle of measurement system have been analyzed in the paper. Also, the infrared tracking, the measuring plate positioning, the calculation of minimum turning radius, and the processing method of the test results have been described in detail. It is proved that the automatic automobile steering angle detecting system has reached the general requirements both in detection resolution and the measuring accuracy.

Analysis of ground handling characteristic of aircraft with electric taxi system

2018 ◽  
Vol 233 (6) ◽  
pp. 1546-1561 ◽  
Author(s):  
Mingyang Huang ◽  
Hong Nie ◽  
Ming Zhang
Keyword(s):  
Mathematic Model ◽  
Landing Gear ◽  
Dynamic Responses ◽  
Spring Back ◽  
Steering Angle ◽  
Turn On ◽  
Traction Motors ◽  
Ground Handling ◽  
Turning Radius ◽  
Minimum Turning Radius

Electric landing gear drive equipped with traction motors can provide taxi capability without the use of main engines or tractor. The ground handling characteristic of aircraft with electric taxi system is analyzed. The new mathematic model of aircraft ground maneuver is established, considering the 6-degree-freedom aircraft body and the flexible main strut and the powered wheel. Quasi-steady method is applied to calculate tire side forces and moments, to determine side slip. The simulation for the ground steering response of aircraft with electric taxi system is done by employing ADAMS and Simulink co-simulation platform. The dynamic responses of aircraft ground steering and landing gear spin-up and spring back are simulated. Different taxi conditions including powered nose wheel mode and powered main wheel mode are compared. Four conclusions are obtained: electric taxi system helps the aircraft turn on the spot and the turning radius is smaller than the aircraft using engines; differential powered main wheel mode has the minimum turning radius while turning-circle with uniform velocity, and it has smaller difference between two vertical loads of main landing gear than powered nose wheel mode; in the case of the same steering angle, the extreme velocity of differential powered main wheel mode before side slip is larger than powered nose wheel mode; and pre-rotation of powered main wheel decreases the spin-up drag load and spring back drag load.

Research on the Steering Character for Kiloton all Terrain Crane

2014 ◽  
Vol 1078 ◽  
pp. 187-190
Author(s):  
Zhong Ying Liu
Keyword(s):  
Deflection Angle ◽  
Steering System ◽  
Front Wheel ◽  
All Wheel Steering ◽  
Turning Radius ◽  
Minimum Turning Radius ◽  
Vehicle Capacity ◽  
Relationship Of ◽  
The Relationship ◽  
Two Degree Of Freedom

Based on the two degree of freedom model of kiloton all-terrain crane, he effects of relationship of deflection angle on turning radius were investigated in multi-axle steering system. MATLAB/Simulink was used to analyze the relationship of every axle in multi-axle steering and optimize the minimum turning radius. The studies show that the kiloton all-terrain crane adapted all-wheel steering driving at 5speed , and the front wheel angle was 32.3°, as compared to the rolling radius before optimization, the turning radius in all wheel turnaround reduced by 33%, which improved the vehicle capacity through the complex curve and increased the vehicle steering flexibility.

Nonlinear Feedforward-Plus-PID Control for Electrohydraulic Steering Systems

1999 ◽  
Author(s):  
Hongchu Qiu ◽  
Qin Zhang ◽  
John F. Reid ◽  
Duqiang Wu
Keyword(s):  
Tracking Error ◽  
Steering System ◽  
Pid Controllers ◽  
Test Results ◽  
Steering Control ◽  
Gain Function ◽  
Nonlinear Gain ◽  
Steering Angle ◽  
Nonlinear Behaviors ◽  
Agricultural Tractor

Abstract This paper presents the development of a nonlinear feedforward-plus-Proportional-Integral-Derivative (FPID) controller for electrohydraulic (E/H) steering on wheel-type tractors. An E/H steering system is a typical nonlinear system with deadband, saturation, asymmetric flow gain, time delay, and other nonlinear behaviors. Conventional PID controllers are incapable of achieving accurate steering control effectively on such nonlinear systems. In this research, an FPID controller was developed for effective and accurate steering control. The feedforward loop in this controller was designed to compensate for the deadband of the E/H system. The PID loop was designed to compensate the tracking error in steering control. A coordinated nonlinear gain function was designed to change the PID loop gain based on the level of the tracking error. This FPID controller has significantly improved the steering accuracy comparing with that from a PID controller. Test results showed that the maximum tracking error in steering angle was less than 0.5° corresponding to a sinusoid steering command of ±5° at the command frequency of 0.1 Hz. The maximum overshoot was less than 12% and the rise time was less than 0.25 s corresponding to a steering command of 5° step input. This FPID controller achieved effective and accurate steering control on agricultural tractor E/H steering systems.

scholarly journals Design and Development of Roll Cage and Steering System of Go-Kart

2021 ◽  
Vol 9 (VI) ◽  
pp. 4641-4649
Author(s):  
Adinarayan Dhananjay Kamat
Keyword(s):  
Tensile Strength ◽  
Maximum Load ◽  
Steering System ◽  
Light Weight ◽  
Motor Sport ◽  
Professional Drivers ◽  
Steering Mechanism ◽  
Turning Radius ◽  
Minimum Turning Radius ◽  
Sharp Corners

Go-kart is a one of the motor sport which is played globally. This racing does not require any professional drivers or greater speed. It is a light weight and cheaper vehicle which does not require suspension and differential. In this paper we are concentrating on Roll cage and steering system of Go-kart. While keeping it light weight, chassis material is selected as AISI 1018 which give more tensile strength, machinability, and can sustain maximum load. For designing and analysis CATIA and ANSYS soft wares were used. Whereas in steering system the Ackermann steering mechanism is used for attaining maximum cornering speed, without the slippage of tires. This also gives us minimum turning radius, helping us to take sharp turns when the driver has to take sharp corners.

scholarly journals Experimental Test of Artificial Potential Field-Based Automobiles Automated Perpendicular Parking

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Yiqun Dong ◽  
Youmin Zhang ◽  
Jianliang Ai
Keyword(s):  
Potential Field ◽  
Artificial Potential Field ◽  
Test Results ◽  
Unmanned Ground Vehicle ◽  
Motion Controller ◽  
Ground Vehicle ◽  
Turning Radius ◽  
Minimum Turning Radius ◽  
Radius Constraint ◽  
Path Modification

Automobiles automated perpendicular parking using Artificial Potential Field (APF) is discussed in this paper. The Unmanned Ground Vehicle (UGV) used for carrying out experiments is introduced first; UGV configuration, kinematics, and motion controller are included. Based on discretized form of the parking space, the APF is generated. Holonomic path for the vehicle parking is found first; path modification to satisfy minimum turning-radius constraint is performed based on Reeds-Shepp curve connections. Optimization efforts are included to remove extra maneuvers and to reduce length of the path. Afterwards waypoints are generated as reference for the vehicle to track. Perpendicular parking tests with several different start configurations are demonstrated; based on the test results the automated parking framework proposed in this paper is considered to be effective.

Measurement and Analysis on Transient Thermal Characteristics of High Speed Motorized Spindle

2011 ◽  
Vol 52-54 ◽  
pp. 2021-2026
Author(s):  
Gui Ling Deng ◽  
Can Zhou
Keyword(s):  
High Speed ◽  
Thermal Deformation ◽  
Thermal Characteristics ◽  
Measuring System ◽  
Test Results ◽  
Motorized Spindle ◽  
Measurement And Analysis ◽  
Turning Center ◽  
Transient Thermal ◽  
Deformation Compensation

Thermal deformation is an important factor to affect the accuracy of the motorized spindle, the core component of high-speed machine tool. To understand the spindle system transient thermal characteristics of the high-speed turning center CH7516GS, some high-precision sensors and high-frequency data acquisition system is used to establish the temperature and displacement measuring system. The thermal deformation compensation model is established on the basis of the experimental test results.

Vehicle Stability Control on Tire Burst Steering and Braking Condition With Active Steering System

2018 ◽  
Author(s):  
Yaqi Dai ◽  
Jian Song ◽  
Liangyao Yu
Keyword(s):  
Control Strategy ◽  
Steering System ◽  
Stability Control ◽  
Steering Angle ◽  
Tire Force ◽  
Vehicle Stability Control ◽  
Yaw Moment Control ◽  
Moment Control ◽  
Control Layer ◽  
Yaw Moment

By analyzing the key safety problems under the front-outside-tire burst steering condition, a vehicle stability control strategy is proposed in this paper, which is based on active front steering and differential braking systems. Taken both the handling stability and safety into account, we divided the whole control strategy into two layers, which are yaw moment control layer and the additional steering angle & tire force distribution layer. To solve the similar linear problem concisely, the LQR control is adopted in the yaw moment control layer. To achieve the goal of providing enough additional lateral force and yaw moment while keeping the burst tire in appropriate condition, the additional steering angle provided by active front steering system and the tire force distribution was adjusted step by step. To test the proposed control strategy performance, we modelling a basic front-outside-tire burst steering condition, in which the tire blows out once the vertical pressure reach the predefined critical value. Through simulation on different adhesion coefficient road, the control strategy proposed in this paper performance quite better compare with the uncontrolled one in aspect of movement, burst tire protection, handling stability.

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