Vehicle seat suspension is one of very important components to provide ride comfort, in particular, commercial vehicles, to reduce driver fatigue due to long hours driving. This paper presents a study on active control of seat suspension to reduce vertical vibration transmitted from uneven road profile to driver body. The control problem will be firstly studied by proposing an integrated seat s...

This paper investigates the vibration attenuation problem of a vehicle suspension test rig, aiming at stabilizing its attitude. In the presence of nonlinear and unknown system dynamics, an accurate mathematical model of the test rig is not available. Active disturbance rejection control is employed to design a controller. An extended state observer is established to estimate the total disturban...

We describe our approach to segmenting moving road vehicles from the color video data supplied by a stationary roadside CCTV camera and classifying those vehicles in terms of type (car, van and HGV Heavy Goods Vehicle) and dominant color. For the segmentation, we use a recursively updated Gaussian mixture model approach, with a multi-dimensional smoothing transform. We show that this transform ...

Abstract The steel turnout is one of the key components in medium–low-speed maglev line system. However, vehicle under active control prone to vehicle–turnout coupled vibration, and thus, it necessary identify vibration characteristics this system through field tests. To end, dynamic performance tests were conducted on a test line. Firstly, response data various operating conditions obtained. T...

This paper presents the design of Genetic Algorithm tuned Distance based Fuzzy Sliding Mode Controller (GA+DFSMC) applied to vehicle suspension system of a quarter car model. DFSMC has only one-dimensional rule table and the generation of fuzzy rules becomes easier. Genetic Algorithm (GA) is proposed to tune the gain parameters to increase the speed of system response and to reduce the chatteri...

The inertial forces acting on operators of joystick controlled machinery in moving vehicles can produce unwanted control signals through the joystick. These forces tend to deteriorate continuous tracking performance and further, when the machinery in control is the vehicle itself, they may lead to unstable oscillations that jeopardize that vehicle’s safe operation. In this paper, we propose the...

We present design, fabrication, and characterization of a small (12 mm × 12 mm × 8 mm) movable railway vehicle for sensor carrying. The miniature railway vehicle (MRV) was mainly composed of a vibrational structure and three legs. A railway was designed and fabricated to power and guide the MRV. It also transmits the sensed data from the MRV to the signal processing unit. The MRV with legs on t...

The vibrations produced by trains include two parts which are deterministic and random vibrations. Due to variation of dynamic loads and patterns of load-time, the random vibration of moving train is one of the most important issues in the field of railway engineering. One of the important sources in producing the train vibrations is rail roughness and irregularities. In this paper, responses o...

Significant structural vibration is an undesirable characteristic in helicopter flight that leads to structural fatigue, poor ride quality for passengers and high acoustic signature for the vehicle. Previous Individual Blade Control (IBC) techniques based on piezoelectric actuator schemes to reduce these effects have been hindered by electromechanical limitations of piezoelectric actuators. The...

Low frequency vibration occurs especially in ground transportation, either as a cause in adjacent environment or within the vehicle itself. The piezoelectric accelerometers commonly used for vibration measurement are not suitable, hence other sensors capable of measuring accelerations down to sub-hertz region have to be used. Based on some previous experience with MEMS acceleration sensors a th...