Modelling and design of optimized electronic wedge brake

This paper discusses the modelling and design of Electronic Wedge Brake (EWB) for a typical passenger car. The optimized version of EWB used as a brake mechanism while Permanent Magnet DC Motor is used as an actuator to drive the mechanism. Complete optimized EWB mathematical modelling is derived from PMDC Motor, leadscrew with gear and EWB based brake heart. The wedge angle is set based on the disk pad coefficient and motor selection is done based on brake design requirement. Simulation is performed to verify the performance of the designed EWB brake. The EWB brake can be described as a linear model with 5th order system in state space form. The design requirement for the brake should be clear to ensure a newly designed EWB based brake perform well accordingly

Modelling and simulation of electronic wedge brake based antilock brake system

This paper discusses the modelling and validation of Electronic Wedge Brake (EWB) based Antilock Brake System (ABS) for typical vehicle. The EWB was use as brake actuator while quarter car vehicle is select to establish ABS. The physical modelling is used to describe both model with others subsystem. The aerodynamic deceleration force factor in vehicle dynamic also has been consider. In addition, various tire model to represent tire behaviour is discuss and compared by simulation software. It can be conclude that the quarter car model is a nonlinear model where velocity of vehicle, tire angular velocity and tire sideslip are consider as the state vectors. However, the braking actuator which contain EWB mechanism and electrical motor as driver can be describe as a linear model with 5th order system

Measurement Of Low Frequency Signal Of Power Grid Using Arduino

The range of the frequency to be measured by a measurement device depends on the purpose of performing the measurement. The frequency measurement device is built specifically according to its range while the price of the device is proportional to its functions. In this paper, a low frequency measurement device to monitor grid frequency is designed using Arduino technology. All aspects of the design from the software to hardware is explained. This device costs less than 100 US Dollar and it is capable to perform data logging for data analysis. The frequency range for the device is between 45 Hz to 60 Hz with 0.003 Hz resolution. This paper also discuss the standard commercial measurement device in power system and Arduino capabilities. The measurement data from the device is analyze for its accuracy and reliability

Development of a quadruped crawling robot prototype

Although wheeled robots are commonly used, it has limited ability to move to any terrains at ease. They suffer from difficulties when travelling over uneven and rough terrains. Legged robots have an advantage over the wheeled robots in that they are suited for such situations. The implementation of legged robots normally requires many motors to move every joint in a robot leg. Additional motor will increase the construction cost, robot weight, and the demand for power supply. Moreover, robot simulation becomes more complex. This research is related to the design and development of a cost effective quadruped autonomous robot. The robot can moves according to a unique pattern using three servo motors as its actuator in each of its leg. The design of the robot is firstly made with CAD program and then the structure of the body and the leg is analyzed in order to find a conect balance and to make sure the servo motors are capable to move the robot. A prototype of the quadruped robot is fabricated and tested thoroughly. Experimental studies are carried out to test its stability issues when the robot moves. The robot is capable of moving forward, backward, turn left and turn right by crawling its way. A microcontroller is used as the brain of the robot assisted by two analog distance sensor for better obstacle sensing. It uses a rechargeable battery as the power supply for the microcontroller. The servo motors on the other hand are powered by another rechargeable battery. At the end of this research, a working prototype has been developed

Robust composite nonlinear feedback for nonlinear Steer-by-Wire vehicle’s Yaw control

Yaw control is a part of an Active Front Steering (AFS) system, which is used to improve vehicle manoeuvrability. Previously, it has been reported that the yaw rate tracking performance of a linear Steer-by-Wire (SBW) vehicle equipped with a Composite Nonlinear Feedback (CNF) controller and a Disturbance Observer (DOB) is robust with respect to side wind disturbance effects. This paper presents further investigation regarding the robustness of the combination between a CNF and a DOB in a nonlinear environment through a developed 7-DOF nonlinear SBW vehicle. Moreover, in contrast to previous studies, this paper also contributes in presenting the validation works of the proposed control system in a real-time situation using a Hardware-in-Loop (HIL) platform. Simulation and validation results show that the CNF and DOB managed to reduce the influence of the side wind disturbance in nonlinearities

Application Of Defect Detection In Gluing Line Using Shape-Based Matching Approach

This paper investigates various approaches for automated inspection of gluing process using shape-based matching application. A new supervised defect detection approach to detect gap defect, bumper defect and bubble defect in gluing application is proposed. The creation of region of interest for important region of the object is further explained. The Correlation algorithm to determine better image processing result using template matching techniques is also proposed. This technique does not only reduce execution time, but also produce high accuracy in defect detection rate. The recognition efficiency will achieve more than 95% with defect’s data for further process

A Dynamic Model Of Electronic Wedge Brake: Experimental, Control And Optimization

This paper discusses the process of modelling and parameter selection for the creation of the electronic wedge brake system (EWB). The system involves a permanent magnet DC engine (PMDC) that drives the motor, the gear leadscrew, and the brake core. The proposed model is simpler and more flexible which can be used in both the most well-known EWB designs either natural or optimized EWB. The selection of the motor is rendered according to the brake specifications. The wedge angle profile is centred on the derivation of EWB system that consists of brake actuator, wedge mechanism dynamic, and wedge characteristic brake factor. Control and optimization are carried out with specific coefficients of friction of the brake pads to maintain operating reliability. A 5th-order brake simulation model of the EWB in a single state-space was derived and a simulation was conducted to verify the distribution of force. The efficiency of the brake clamping force control system was assessed by proportional-integral-derivative (PID) control. The performance of the proposed controller is verified in simulations and experiments using a prototype electronic wedge brake. The research findings indicate, the actuator restriction is deemed to achieve consistent performance against full range braking during the EWB control desig

Peltier And Seebeck Efficacy Of Hot And Cold Air System For Portable O-Ref (Oven & Refrigerator) Application

The main motivation in using Peltier Module is due to the uniqueness of producing hot and cold air at the same time besides able to generate electricity using Seebeck Effect. The generating system theoretically can recycle the heat loss to produce additional electricity for other usage. The efficacy of this system tested using two types of experimental using Peltier and Seebeck Effect. Both experimental is conducted using 3 specific volumes; 1) 1000cm3; 2) 4000cm3; and 3) 9000cm3. As a result, temperature for heating and cooling systems achieve around 14 – 56oC while the voltage generated around 12V in 50 minutes

Bio-Physics Concept For Camera Vision Hypothesis Of Colour White

In the myriad of colours, black and white are strange colours to be discussed. Since black (the colour that one perceives) is not in the Electromagnetic (EM) spectrum, it is duly suggested that black is an interpretation of the brain in which the existing “no signal” concept is also discussed in the article. The same goes to the colour white, it is not in the EM spectrum too, so it is also duly proposed as an interpretation of the brain. The concept of white as combination of colour is also discussed in the article. It is insignificant to discuss about both these colours of their existence in the reflection of colour representation since their non-existent in EM spectrum is similar to the colour pink or magenta. There is a hypothesis (for white light colour theory test) at the end of this article, the authors welcome any scientists or engineers or researcher all over the world to assess, deliberate and prove the truth of this theory

Self Tuning PID Control Of Antilock Braking System Using Electronic Wedge Brake

This paper describes the design of an antilock braking system (ABS) control for a passenger vehicle that employs an electronic wedge brake (EWB). The system is based on a two-degree-of-freedom (2-DOF) vehicle dynamic traction model, with the EWB acting as the brake actuator. The developed control structure, known as the Self-Tuning PID controller, is made up of a proportional-integral-derivative (PID) controller that serves as the main feedback loop control and a fuzzy supervisory system that serves as a tuner for the PID controller gains. This control structure is generated through two structures, namely FPID and SFPID, where the difference between these two structures is based on the fuzzy input used. An ABS-based PI D controller and a fuzzy fractional PID controller developed in previous works were used as the benchmark, as well as the testing method, to evaluate the effectiveness of the controller structure. According to the results of the tests, the performance of the SFPID controller is better than that of other PID and FPID controllers, being 10% and 1% faster in terms of stopping time, 8% and 1% shorter in terms of stopping distance, 9% and 1% faster in terms of settling time, and 40% and 5% more efficient in reaching the target slip, respectively