汽车防滑控制的研究

本文介绍了车轮防滑控制系统，分别对车辆，轮胎，发动机，制动系，驱动系进行了建模，提出了简单实用的控制算法，采用实时闭环模拟系统对控制器进行了试验验证。根据路面工况进行发动机和制动控制。模拟了在低附着系数路面下起动的动态过程，并对比了试验结果。     

广州市岭头三桥的评定与加固

通过对广州市岭头三桥进行调查检测，对其现状进行了深入的分析，进行了可靠度评定，分析了病害，提出了加固方案。     

重载交通路面结构设计交通参数调查与分析

通过对交通状况的调查，得到了抽载谱，分析了交通量组成，空载率，交通量增长率，进行了交通量轴载换算，并对路面结构厚度进行了试算。     

McPherson式悬架的运动学及静力学计算分析

本文以IBIZA车前悬架原型为例，分析建立了McPherson式前悬架的运动学及静力学模型，简述了分析方法，并对原型悬架进行了分析计算，对结果进行了分析，从而对后期我们为前悬架进行改进提供了依据。     

扫路车副发动机风机安装系统故障分析及改进

对路洁牌HGJ5060、5061GXC型扫路车的关键部件一副发动机风机安装系统常见故障进行了研究，从设计，制造，使用等方面进行了理论分析和现场试验，寻找原因，提出对策，对该系统进行了改进设计，并取得了满意的效果。     

汽车储能弹簧制动气室的设计与试验分析

汽车储能弹簧制动气室做为驻车制动系统的动力装置，提高了驻车制动效能，简化了驻车制动系统结构，在简单介绍了储能弹簧制动气室结构的基础上，对储能弹簧制动气室进行了设计，对主要性能进行了较全面的测试，并对试验结果进行了分析。     

低平板组合挂车分载系统设计

设计了一种低平板组合挂车的分载系统，这种分载系统可以提高低平板组合挂车的承载能力，同时保证其拼车连接结构受到的载荷在标准范围之内。给出了分载系统的分载原理，进行了分载系统的结构设计，并利用ANSYS软件对典型车辆进行了有限元分析，对分载系统进行了强度计算，结果表明所设计的分载系统是可行和有效的。最后，对分载系统的支座进行了拓扑优化设计。     

变参数压缩螺旋弹簧的性能评述

对变参数压缩螺旋弹簧进行了分类，研究了主要性能，指出了优越性，提出了评价指标，制订了设计原则，进行了对比计算。     

信息资源管理策略方法

文章论述了信息资源管理在信息化和信息系统建设中的地位和作用，提出了进行信息资源管理的策略方法，即进行正规的总体数据规划，对信息进行分类管理，建立信息资源管理的一系列标准，采用集成化的辅助工具对信息资源进行管理。     

泥石流排导沟弯曲段水面超高的估算

本文对不同类型的泥石流在排导沟弯曲的水面超高计算方法进行了理论上的探讨，得到了数学表达式。这些公式考虑了泥石流的特性，结构合理，具有一的理论意义，为便于工程上的应用，对有关公式进行了简化，并用实测资料进行了验证，结果表明，计算值与实测值基本符合。     

Vehicle dynamics control using an active third-axle system

This paper introduces the active third-axle system as an innovative vehicle dynamic control method. This method can be applicable for different kinds of three-axle vehicles such as buses, trucks, or even three-axle passenger cars. In this system, an actuator on the middle axle actively applies an independent force on the suspension to improve the handling characteristics, and hence, its technology is similar to slow-active suspension systems. This system can change the inherent vehicle dynamic characteristics, such as under/over steering behaviour, in the linear handling region, as well as vehicle stability in the nonlinear, limit handling region. In this paper, our main focus is to show the potential capabilities of this method in enhancing vehicle dynamic performance. For this purpose, as the first step, the proposed method in both linear and nonlinear vehicle handling regions is studied mathematically. Next, a comprehensive, nonlinear, 10 degrees of freedom vehicle model with a fuzzy control strategy is used to evaluate the effectiveness of this system. The dynamic behaviour of a vehicle, when either uncontrolled or equipped with the active third axle is then compared. Simulation results show that this active system can be considered as an innovative method for vehicle dynamic control.     

An Advanced Steering System with Active Kinesthetic Feedback for Handling Qualities Improvement

Advanced Steering System with artificial steering wheel torque-active kinesthetic information feedback for improving handling qualities is discussed. Fundamentally the structure of the system may be considered to another form of model following control. In this system, a driver always remains in the control loop and receives steering control information which give him/her a direct hint to steer a steering wheel. This system works as a stability and control augmentation system of the vehicle to improve the vehicle handling qualities both in compensatory and pursuit control task, and is expected to reduce driver's workload. Effects of this system are analyzed in terms of man-machine system characteristics. Identification of driver dynamics was carried out to find why such improvement could be achieved. Availability of the proposed system is verified by analysis, simulator and proving ground tests.     

An Advanced Steering System with Active Kinesthetic Feedback for Handling Qualities Improvement

SUMMARY

Advanced Steering System with artificial steering wheel torque-active kinesthetic information feedback for improving handling qualities is discussed. Fundamentally the structure of the system may be considered to another form of model following control. In this system, a driver always remains in the control loop and receives steering control information which give him/her a direct hint to steer a steering wheel. This system works as a stability and control augmentation system of the vehicle to improve the vehicle handling qualities both in compensatory and pursuit control task, and is expected to reduce driver's workload. Effects of this system are analyzed in terms of man-machine system characteristics. Identification of driver dynamics was carried out to find why such improvement could be achieved. Availability of the proposed system is verified by analysis, simulator and proving ground tests.     

Stabilization Control for Rider-Motorcycle Model in Hamiltonian Form

This study deals with dynamics and control of a rider-motorcycle system model in Hamiltonian form. The model is established to account for not only the motorcycle dynamics but also changes in rider's postures. Tyre forces are treated as external forces and rider's control actions contain three actuation torques. The Hamiltonian system is subject to dissipation effects due to tyre forces and rider's control torques. In addition to the total Hamiltonian, a generalized free energy is employed in formulation. Lyapunov's second method provides sufficient conditions for stability. Variable structure system (VSS) control is used to account for stabilization control exerted by the rider. Simulation results validate the proposed method.     

模型跟踪控制在复合制动系统中的应用

本文旨在协调复合制动系统中的机-电制动力矩,确保车辆的制动效能。以搭载基于常规的逻辑门限值控制的液压防抱死制动系统车辆单轮模型为仿真平台,构建了复合制动控制器。针对以轮速为控制变量的模型跟踪控制方法的缺陷,搭建了以车轮角加速度为控制变量的模型跟踪控制器,并通过仿真对比验证了其改进效果。硬件在环试验结果验证了控制策略的有效性。     

A receding horizon sliding control approach for electric powertrains with backlash and flexible half-shafts

Active control of electric powertrains is challenging, due to the fact that backlash and structural flexibility in transmission components can cause severe performance degradation or even instability of the control system. Furthermore, high impact forces in transmissions reduce driving comfort and possibly lead to damage of the mechanical elements in contact. In this paper, a nonlinear electric powertrain is modelled as a piecewise affine (PWA) system. The novel receding horizon sliding control (RHSC) idea is extended to constrained PWA systems and utilised to systematically address the active control problem for electric powertrains. Simulations are conducted in Matlab/Simulink in conjunction with the high fidelity Carsim software. RHSC shows superior jerk suppression and target wheel speed tracking performance as well as reduced computational cost over classical model predictive control (MPC). This indicates the newly proposed RHSC is an effective method to address the active control problem for electric powertrains.     

Steering torque control using variable impedance models for a steer-by-wire system

This paper presents a novel sensor-less steering torque control method for applications to the steer-by-wire system. A steer-by-wire system has not any mechanical link to connect a steering wheel and a rack and pinion gear module. Instead of mechanical devices, two electric motors are used on each side. A one motor is attached to the steering wheel and the other is set on rack and pinion. The motor on the steering wheel works as a deliverer between a steering torque and load torque from the road. In this paper, we focus on motion control related to the steering feel based on impedance control. Therefore, the model of rack and pinion is not considered in this work. In most power steering systems, a torque sensor is used to set impedance effect on driver’s steering feel. In this paper, we proposed a novel steering control method without using any torque sensors. The effectiveness of a proposed method is confirmed from experimental results.     

Evaluation of preview G-Vectoring control to decelerate a vehicle prior to entry into a curve

This paper describes the development of the braking assistance system based on a “G-Vectoring” concept. The present work focuses in particular on “Preview G-Vectoring Control” (PGVC), which is based on the “G-Vectoring Control” (GVC) scheme. In GVC, the longitudinal-acceleration control algorithm is based on the actual lateral jerk. PGVC decelerates a vehicle before it enters a curve, and is based on a new longitudinal-acceleration control algorithm which uses predicted and actual lateral jerk. Using the predicted lateral jerk makes it possible to decelerate the vehicle prior to curve entry. This deceleration can emulate a driver’s deceleration as the vehicle approaches a curve entry. PGVC is based on such deceleration algorithms and enables automatic deceleration similar to the action of a driver. It is thus possible to significantly improve the driver’s feeling when this system is activated. Driving tests with this new control system on snowy-winding course confirmed that the automatic brake control quality improved considerably compared to manual driver control considering both lap time and ride quality. These results indicate that PGVC can be a useful braking assistance system not only to improve the driver’s handling performance but also to reduce the brake-task during driving on winding roads.     

A fundamental investigation of tilt control systems for narrow commuter vehicles

One way of addressing traffic congestion is by efficiently utilizing the existing highway infrastructure. Narrow tilting vehicles that need a reduced width lane can be part of the solution if they can be designed to be safe, stable, and easy to operate. In this paper, a control system that stabilizes the tilt mode of such a vehicle without affecting the handling of the vehicle is proposed. This control system is a combination of two different types of control schemes known as steering tilt control (STC) and direct tilt control (DTC) systems. First, different existing variations of both STC and DTC systems are considered and their shortcomings analysed. Modified control schemes are then suggested to overcome the deficiencies. Then a new method of integrating these two control schemes that guarantees smooth switchover between the controllers as a function of vehicle velocity is proposed. The performance of the proposed STC, DTC, and integrated systems is evaluated by carrying out simulations for different operating conditions and some experimental work. The design of a second-generation narrow tilting vehicle on which the developed control system has been implemented is presented.     

A fundamental investigation of tilt control systems for narrow commuter vehicles

One way of addressing traffic congestion is by efficiently utilizing the existing highway infrastructure. Narrow tilting vehicles that need a reduced width lane can be part of the solution if they can be designed to be safe, stable, and easy to operate. In this paper, a control system that stabilizes the tilt mode of such a vehicle without affecting the handling of the vehicle is proposed. This control system is a combination of two different types of control schemes known as steering tilt control (STC) and direct tilt control (DTC) systems. First, different existing variations of both STC and DTC systems are considered and their shortcomings analysed. Modified control schemes are then suggested to overcome the deficiencies. Then a new method of integrating these two control schemes that guarantees smooth switchover between the controllers as a function of vehicle velocity is proposed. The performance of the proposed STC, DTC, and integrated systems is evaluated by carrying out simulations for different operating conditions and some experimental work. The design of a second-generation narrow tilting vehicle on which the developed control system has been implemented is presented.