Design and Simulation of a 4-DOF Haptic System Featuring MR Brakes and SCARA Manipulator Mechanism

The objective of this research is to develop a novel 4-DOF haptic joystick that incorporates three rotary MR brakes, one linear MR brake, and a 4-DOF SCARA manipulator mechanism. The proposed haptic system aims to overcome the limitations of previously developed MRF-based haptic systems. The MR brakes are integrated into the SCARA manipulator joints to generate the desired feedback force and torque. In this study, the Bingham plastic rheological model and finite element method are utilized to design and model the MR brakes. Additionally, the particle swarm optimization (PSO) method is employed to optimize the MR brakes’ mass and manufacturing costs. Once the optimal results are obtained, a detailed design of the haptic system is created, and simulations are conducted to evaluate the proposed system’s performance. The proposed 4-DOF haptic joystick has potential applications in various fields, including teleoperation, virtual reality, and robotics, where precise haptic feedback is crucial. The results of this study can provide an efficient and cost-effective solution for developing haptic systems that can enhance the user's experience and performance in various applications.