Mechatronics has become an inevitable trend in the development of the industry, manufacturing industry in the rapid development of today has also driven the innovation of technology. In the ...development process of mechatronics, flexible sensors stand out, flexible sensors have the characteristics of flexibility, and a wider range of applications, which is the frontier direction of contemporary electromechanical development. Mechanical and electronic engineering is for the traditional engineering disciplines, the teaching process of students to accept concepts and other content ability is poor, lack of interest, the need for new solutions to solve problems. And by using flexible sensors in exemplary teaching, electromechanical knowledge can be taught more effectively, which can enhance students' vision, learning ability, indepe, dance, and innovation. In this paper, we outline the principles of flexible sensors, and sensors in electromechanical engineering, the advantages and disadvantages of each type of flsensorsensors, and their broad prospects for electromechanical teaching applications.
Display omitted
•A novel optimal design methodology of vehicle mechatronic ISD suspension using the fractional-order electrical network is proposed, to enhance the vibration suppression ...performance.•The correspondingrelationship and analytical expression between the fractional-order mechanical network elements and the fractional-order electrical network elements are obtained.•A quarter car is taken as an example, the dynamic model of the vehicle mechatronic ISD suspension using the fractional-order electrical network and the integer-order network are established.•The advantages of the vehicle mechatronic ISD suspension using the fractional-order electrical network are validated through numerical simulations and experiments under different road input conditions.
To further explore the beneficial effects of the vibration isolation performance of a new vehicle ISD (inerter-spring-damper) suspension using a mechatronic inerter, this paper proposes a novel optimal design methodology for a vehicle mechatronic ISD suspension system based on a fractional-order electrical network is proposed. In view of difficulties in the engineering implementation of fractional-order mechanical network elements, this paper first studies the correspondingrelationship and analytical expression of fractional-order mechanical and electrical network elements respectively. Under the instruction of fractional calculus, the fractional-order electrical network elements are used to realize equivalent fractional-order mechanical network elements by adopting a ball-screw mechatronic inerter. Then, a quarter car dynamic model of vehicle mechatronic ISD suspension is constructed, and the parameters of the fractional-order electrical network and the integer-order electrical network are obtained by means of particle swarm optimization algorithm. The performance advantages of vehicle mechatronic ISD suspension using a fractional-order electrical network are verified by numerical simulations and experiments. The results show that, compared with the application of an integer-order electrical network, the vibration suppression performance of a vehicle mechatronic ISD suspension can be further enhanced by using a fractional-order electrical network.
•A heavy load energy harvesting shock absorber is proposed with its precise model.•Sensitivity analysis is conducted to investigate its damping quantificationally.•Resistance and gear ratio affect ...equivalent damping coefficient significantly.•The optimal resistance range under different parameter matching is determined.•Excitation frequency and amplitude impact damping and absorbing energy drastically.
In this paper, a mechatronic shock absorber based on ball screw pair is designed, which can produce large damping force under the same working conditions, the dynamic model of mechatronic shock absorber is established, in which the damping force is divided into inertial damping force, electromagnetic damping force, and mechanical damping force, respectively. The global sensitivity analysis methodology, named Sobol based on variance, is employed to carry out parameter sensitivity analysis, the parameters of excitation amplitude, frequency, load resistance, motor back electromotive force constant, motor electromagnetic torque constant, lead screw, motor reducer transmission ratio are investigated comprehensively. Results indicate that for the operational conditions, the load resistance has the greatest impact on equivalent damping coefficient; while for the structural parameters, the transmission ratio has the greatest impact on equivalent damping coefficient. Based on the results of parameter sensitivity analysis, aiming at vehicle ride comfort, take a certain type of light truck as an example, the optimal approach of load resistance range under different structural parameters are proposed. Finally, the experimental tests are conducted, and validates the established dynamic model. This work provides a theoretical basis for guiding the future design of the mechatronic shock absorber.
Display omitted
There is a growing need for robotic apple harvesting due to decreasing availability and rising cost in labor. Towards the goal of developing a viable robotic system for apple harvesting, this paper ...presents synergistic mechatronic design and motion control of a robotic apple harvesting prototype, which lays a critical foundation for future advancements. Specifically, we develop a deep learning-based fruit detection and localization system using a RGB-D camera. A three degree-of-freedom manipulator is designed with a hybrid pneumatic/motor actuation mechanism to achieve dexterous movements. A vacuum-based end-effector is used for apple detaching. These three components are integrated into a robotic apple harvesting prototype with simplicity, compactness, and robustness. Moreover, a nonlinear control scheme is developed for the manipulator to achieve accurate and agile motion control. Field experiments are conducted to demonstrate the performance of the developed apple harvesting robot.
•The synergistic development of a robotic apple harvesting prototype is presented.•A control strategy is designed by fully exploiting the mechanical structure of the manipulator.•The experimental studies validate the design concept and underpin future research.
An important bottleneck in the design, operation, and exploitation of mechatronic powertrains is the lack of accurate knowledge of broadband external loading. This is caused by the intrusive nature ...of regular torque measurements. This paper proposes a novel nonintrusive approach to obtain torsional load information on mechatronic powertrains. Online coupled state/input estimation is performed through an augmented nonlinear Kalman filter. This estimation approach exploits general lumped-parameter physics-based models in order to create a widely applicable framework. This paper considers both extended (EKF) and unscented Kalman filtering approaches. Contrary to previous works, no considerable difference in accuracy is obtained from experiments, with a considerably lower computational load for the EKF. This paper reveals the benefits of including rotational acceleration measurements from a theoretical perspective, which is demonstrated through the experimental validation. This drastically increases the broadband accuracy. The result of this paper is an accurate and noninvasive virtual torque sensor with a sufficiently broad bandwidth for use in condition monitoring, control, and future design optimization.
This teaching case examines how engineering consultants Helbling Technik AG overcame challenges in implementing a digital twin approach to mechatronics product development, saving costs, and reducing ...time to market. It challenges students to understand digital twins in mechatronic system development and their implications for processes, use cases, and service models. This real-world example is relevant for students and educators interested in the challenges and opportunities of digital twin implementation.
This brief is devoted to the experimental study of possibilities for control of the phase shift between two vibration actuators. The control laws for frequency stabilization simultaneously with the ...prescribed phase shift between the rotors angular positions are proposed and experimentally studied by means of the mechatronic vibration test bed. It is obtained that for the low and medium frequencies, the self-synchronization of unbalanced rotors does not prevent achieving the desired phase shift between the rotors. For a high-frequency band, the Huygens self-synchronization of rotors manifests itself, narrowing the range of the achievable phase shift. The obtained experimental results are in agreement with the simulation results obtained from the 7-DOF mathematical model. Especially important is an agreement in the vibrational field observed from simulation and experiment. The qualitative coincidence of such complex motions means both the validation of the model and the verification of the measurement and experiment methodology.
We address modeling and control of a gate access automation system. A model of the mechatronic system is derived and identified. Then, an approximate explicit feedback linearization scheme is ...proposed, which ensures almost linear response between the electronic driver duty cycle input and the delivered torque. A nonlinear optimization problem is solved offline to generate a feasible trajectory associated with a feedforward action, and a low-level feedback controller is designed to track it. The feedback gains can be conveniently tuned by solving a set of convex linear matrix inequalities, performing a multiobjective tradeoff between disturbance attenuation and transient response. The proposed control strategy is tested on an industrial device. The experiments show that it can effectively meet the requirements in terms of robustness, load disturbance rejection, and tracking performance.
This paper proposes a novel filter-based immersion and invariance (I&I) adaptive method for nonlinear systems with additive disturbances and parameter uncertainties. The key innovation of the ...proposed method is a filter construction that involves the dynamics of the system, based on which the I&I parameter estimator with a sigma modification term is designed. Comparing existing I&I methods, the expression for the novel filter-based I&I estimator is given in terms of total derivatives rather than partial derivatives, which is no longer subject to the integrability condition. In combining the sigma modification term, the proposed parameter estimator also guarantee the uniformly ultimately bounded stability of the parameter estimation error when the system is disturbed, which cannot be achieved by the original I&I method. Furthermore, Lyapunov theory demonstrates that the proposed method can guarantee the stability of the nonlinear systems discussed in this paper. Simulation and experimental results confirm the effectiveness of the proposed method.
Roll dynamics of powered two-wheelers (PTWs) are unstable at low speed, and their active control could improve both safety and comfort. This article proposes the co-design of a stabilization system ...based on control momentum gyroscopes, which, with their compact package and low power request, are a fascinating option in particular for PTW, where onboard energy and size constraints make the design of a proper roll torque actuator challenging. The joint design of the actuator and its control law is proposed by defining a multiobjective optimization problem, which also turns into a tool that allows the designer to steer the parameters choice in different directions. The resulting prototype is manufactured, installed on a motorcycle, tested, and experimentally validated in several conditions.
PDF
