Now showing items 1-20 of 27

    • Cohesive zone modeling of ductile tearing process in brazed joints 

      Ghovanlou, Morvarid K.; Jahed, Hamid; Khajepour, Amir (Elsevier, 2013-04-01)
      Ductile tearing process in low carbon steel brazed joints with copper filler metal is studied using the Cohesive Zone Model. The Cohesive Zone Model is characterized by two parameters related to the cohesive strength and ...
    • Cohesive zone modeling of fatigue crack growth in brazed joints 

      Ghovanlou, Morvarid K.; Jahed, Hamid; Khajepour, Amir (Elsevier, 2014-04-01)
      Fatigue crack growth in low carbon steel brazed joints with copper filler metal is modeled by an irreversible Cohesive Zone Model. Strain-controlled fatigue tests are performed on the brazed specimens, and the corresponding ...
    • A comprehensive review of the key technologies for pure electric vehicles 

      Li, Zhenhi; Khajepour, Amir; Song, Jinchun (Elsevier, 2019-09-01)
      Nowadays, the emissions from conventional vehicles significantly contribute to increasingly serious environmental issues. In addition, the energy crisis and the low energy efficiency of conventional vehicles also offer a ...
    • A comprehensive study on the stability analysis of vehicle dynamics with pure/combined-slip tyre models 

      Pirani, Mohammad; Khajepour, Amir; Kasaiezadeh Mahabadi, Seyed Alireza; Hashemi, Ehsan (Taylor & Francis, 2016-09-28)
      In this paper, a vehicle's lateral dynamic model is developed based on the pure and the combined-slip LuGre tyre models. Conventional vehicle's lateral dynamic methods derive handling models utilising linear tyres and ...
    • Corner-based estimation of tire forces and vehicle velocities robust to road conditions 

      Hashemi, Ehsan; Pirani, Mohammad; Khajepour, Amir; Kasaiezadeh Mahabadi, Seyed Alireza; Chen, Shih-Ken; Litkouhi, Baktiar (Elsevier, 2017-04)
      Recent developments in vehicle stability control and active safety systems have led to an interest in reliable vehicle state estimation on various road conditions. This paper presents a novel method for tire force and ...
    • Distributed Robust Vehicle State Estimation 

      Hashemi, Ehsan; Pirani, Mohammad; Fidan, Baris; Khajepour, Amir; Chen, Shih-Ken; Litkouhi, Baktiar (Institute of Electrical and Electronics Engineers, 2017-06)
      A distributed estimation approach based on opinion dynamics is proposed to enhance the reliability of vehicle corners’ velocity estimates, which are obtained by an unscented Kalman filter. The corners’ estimates from a ...
    • Efficient electrochemical model for lithium-ion cells 

      Afshar, Sepideh; Morris, Kirsten; Khajepour, Amir (2017-09-12)
      Lithium-ion batteries are used to store energy in electric vehicles. Physical models based on electro-chemistry accurately predict the cell dynamics, in particular the state of charge. However, these models are nonlinear ...
    • Estimation of longitudinal speed robust to road conditions for ground vehicles 

      Kasaiezadeh Mahabadi, Seyed Alireza; Khosravani, Saeid; Khajepour, Amir; Moshchuk, Nikolai; Chen, Shih-Ken; Hashemi, Ehsan (Taylor & Francis, 2016-06-14)
      This article seeks to develop a longitudinal vehicle velocity estimator robust to road conditions by employing a tyre model at each corner. Combining the lumped LuGre tyre model and the vehicle kinematics, the tyres internal ...
    • A flexible hybridized electromagnetic-triboelectric multi-purpose self-powered sensor 

      Askari, Hassan; Saadatnia, Zia; Asadi, Ehsan; Khajepour, Amir; Khamesee, Mir Behrad; Zu, Jean (Elsevier, 2018-03-01)
      This paper presents a novel hybridized flexible electromagnetic-triboelectric generator that consists of a round/square shaped coil and magnet, and also, highly flexible, mechanically and thermally durable, and cost-effective ...
    • A flexible tube-based triboelectric-electromagnetic sensor for knee rehabilitation assessment 

      Askari, Hassan; Asadi, Ehsan; Saadatnia, Zia; Khajepour, Amir; Khamesee, Mir Behrad; Zu, Jean (Elsevier, 2018-08-01)
      This paper reports a novel hybridized flexible electromagnetic-triboelectric generator for vibration/deflection monitoring as it is implemented in a cantilever or clamped-clamped configuration. The proposed self-powered ...
    • Integrated estimation structure for the tire friction forces in ground vehicles 

      Hashemi, Ehsan; Pirani, Mohammad; Khajepour, Amir; Fidan, Baris; Kasaiezadeh Mahabadi, Seyed Alireza; Chen, Shih-Ken; Litkouhi, Baktiar (Institute of Electrical and Electronics Engineers, 2016-07)
      This paper presents a novel corner-based force estimation method to monitor tire capacities required for the traction and stability control systems. This is entailed for more advanced vehicle stability systems in harsh ...
    • Kinematic and three-dimensional dynamic modeling of a biped robot 

      Khajepour, Amir; Hashemi, Ehsan (Sage, 2017-03-01)
      This article focuses on inverse kinematic formulation and dynamic modeling of the Nao biped robot's lower body, accompanied by verification with the joints' angles as experimental data. Dynamic modeling in two different ...
    • Laminated Injection Mould with Conformal Cooling Channels: Optimization, Fabrication and Testing 

      Ahari, Hossein; Khajepour, Amir; Bedi, Sanjeev (World Academic Publishing, 2013-06-01)
      Conformal cooling channels follow the cavity shape and can provide a better cooling performance in injection moulds. Laminated tooling is one of the techniques for manufacturing injection moulds with conformal cooling ...
    • Longitudinal vehicle state estimation using nonlinear and parameter-varying observers 

      Hashemi, Ehsan; Khosravani, Saeid; Khajepour, Amir; Kasaiezadeh Mahabadi, Seyed Alireza; Chen, Shih-Ken; Litkouhi, Baktiar (Elsevier, 2017-05)
      A corner-based velocity estimation approach is proposed which is used for vehicle’s traction and stability control systems. This approach incorporates internal tire states within the vehicle kinematics and enables the ...
    • Model predictive control-based energy management strategy for a series hybrid electric tracked vehicle 

      Wang, Hong; Huang, Yanjun; Khajepour, Amir; Song, Qiang (Elsevier, 2016-11-15)
      The series hybrid electric tracked bulldozer (HETB)’s fuel economy heavily depends on its energy management strategy. This paper presents a model predictive controller (MPC) to solve the energy management problem in an ...
    • Modelling and optimal energy-saving control of automotive air-conditioning and refrigeration systems 

      Huang, Yanjun; Khajepour, Amir; Bagheri, Farshid; Bahrami, Majid; Bagheri (Sage, 2017-02-01)
      Air-conditioning and refrigeration systems are extensively adopted in homes, industry and vehicles. An important step in achieving a better performance and a higher energy efficiency for air-conditioning and refrigeration ...
    • A modified sliding-mode observer design with application to diffusion equation 

      Afshar, Sepideh; Morris, Kirsten; Khajepour, Amir (Taylor and Francis, 2018-02-27)
      In many physical systems, the system's full state cannot be measured. An observer is designed to reconstruct the state from measurements. Disturbances often contribute to the dynamics of the system, and the designed observer ...
    • A New Adaptive Controller for Performance Improvement of Automotive Suspension Systems with MR Dampers 

      Khajepour, Amir; Agrawal, Ankur (SAE International, 2014-04-01)
      A control algorithm is developed for active/semi-active suspensions which can provide more comfort and better handling simultaneously. A weighting parameter is tuned online which is derived from two components - slow and ...
    • Optimal energy-efficient predictive controllers in automotive air-conditioning/refrigeration systems 

      Huang, Yanjun; Khajepour, Amir; Bagheri, Farshid; Bahrami, Majid (Elsevier, 2016-12-15)
      This paper presents several robust model predictive controllers that improve the temperature performance and minimize energy consumption in an automotive air-conditioning/refrigeration (A/C-R) system with a three-speed and ...
    • Optimal Sensor Configuration and Fault-Tolerant Estimation of Vehicle States 

      Zarringhalam, Reza; Rezaeian, Ayyoub; Fallah, Saber; Khajepour, Amir; Melek, William; Chen, Shih-Ken; Litkouhi, Baktiar (SAE International, 2013-04-08)
      This paper discusses observability of the vehicle states using different sensor configurations as well as fault-tolerant estimation of these states. The optimality of the sensor configurations is assessed through different ...

      UWSpace

      University of Waterloo Library
      200 University Avenue West
      Waterloo, Ontario, Canada N2L 3G1
      519 888 4883

      All items in UWSpace are protected by copyright, with all rights reserved.

      DSpace software

      Service outages