With the resurgence in bicycle ridership in the last decade, a better understanding of bicycle rider behavior is important in accommodating increasing bicycle traffic as well as reducing accidents that come along with it. At TU Delft we have designed a fixed-base bicycle simulator to understand how bicycle rider's interact with other road users in a safe virtual environment.

We present a solution-region-based synthesis approach for selecting optimal four-bar linkages with a Ball-Burmester point. We discuss both general and special cases of the Burmester point that coincide with the Ball point at the pole of the inflection circle. We generate different mechanism property charts by developing mechanism software that enables users to intuitively identify relevant linkage information and select the optimal linkage.

This paper studies the effect of the tower dynamics upon the wind turbine model by using mixed sets of coordinates within multibody system approach. The dynamics of wind turbine model is presented based on the floating frame of reference formulation. The mixed coordinates consists of three sets: Cartesian, elastic, and reduced-order modal coordinates for low speed components. Experimental validation has been carried out successfully, and the model can be utilized for design process.

Since the common layout of Precise cable drive, Single-Input Single-Output (SISO) spur gear configuration, suffers from low torque-to-weight ratio and loose structure, this paper proposes a novel transmission configuration. It combines the advantages of Multiple-Input Single-Output (MISO) configuration and bevel gear configuration. The proposed technologies could have strong technological implications in some special applications such as stabilized sighting system or infrared imaging seeker.

In this article, prediction models of the braking performance and power consumption of electromagnetic brake are established and their accuracies are verified on the hardware in the loop simulation platform. The electromagnetic brake is designed aiming at reducing the energy consumption and the energy saving control method of electromagnetic brake is also proposed.

For launching satellite, with the needs of mobility and rapid-responsibility, the vehicle is used for launching. The system inevitably undergoes random vibrations caused by uneven ground excitation, while the camera and other high-precision payloads of the satellite cannot withstand the harsh mechanical environment without isolators. Due to the superior damping properties of MR, this paper designs the simple MR components and provides a feasible design method to absorb vibrations.

In this paper, the bottom tool of RSS calculation model was established based on the secondary development of ABAQUS software. The dynamic characteristics of the inherent frequency and dynamic stress of the BHA were calculated and analyzed, and risk assessment method based on the quantitative vibration intensity was established. The reliability of typical drilling tool is evaluated, which provides a reference for the optimization design of drilling tools.

Origami is a powerful and elegant tool that can be used by engineers to overcome challenges. The shape of the origami is essential to this. We categorize the shapes (fold states) of origami into seven classifications. This categorization method is supported by analyzing 69 origami-based devices for correlations between the classification and the types of functions they perform. These correlations can be used to design and select origami fold states.

This paper presents a new exoskeleton design for wrist and forearm rehabilitation. The contribution of this study is to offer a methodology which shows how to adapt a serial manipulator that reduces the number of actuators used in exoskeleton design for the rehabilitation. The system offered is a combination of end-effector- and exoskeleton-based devices. The passive exoskeleton is attached to the end effector of the manipulator, which provides motion for the purpose of rehabilitation process.

In this paper, the preoperative planning algorithm is proposed, which makes the laparoscope provide a reasonable initial visual field. The algorithm offers significant improvements in planning time and quality for robot-assisted laparoscopic surgery. The improved method which combines the preoperative planning algorithm with deep reinforcement learning algorithm is applied to laparoscope arm automatic positioning. The algorithm provides a basis for the robot-assisted laparoscopic surgery.

Nanoscale components are used extensively in a variety of nanotechnology applications. In particular, carbon nanotubes (CNTs) are used in diverse fields due their superior properties. For specific applications, their mechanical behaviour under loading needs to be investigated. Buckling of CNTs is a critical failure mode and in the present study, nonlocal continuum mechanics is employed to investigate their buckling behaviour subject to elastically restrained boundary conditions.

In this research, a five-blade surface-piercing propeller was tested in the free surface water tunnel of Babol Noshirvani University of Technology to expand the experimental database for future engineering designs. The effect of immersion ratio and shaft inclination angle on the propeller's efficiency and hydrodynamic coefficients were examined. The highest efficiency of the propeller was achieved in the range of a 40 %–50 % immersion ratio at all angles of shaft inclination.

The helical gear system is an important form of transmission in high-speed trains. The wear fault parameters of a bending-torsion-shaft coupling mode with six degrees of freedom are established. Using the variable step fourth-order Runge-Kutta numerical integration method, the gear dynamics model with fault parameters is analyzed to get the dynamic response of the helical gear system. The periodic motion and so on with variable fault parameters are analyzed qualitatively based on the results.

Contact-impact is a particularly salient phenomenon which plays an important role pervasive in many applications involving the design and analysis of mechanical system, especially for the key parts or structures made of composite materials. The oblique contact-impact of the composite structural bars with a solid flat surface has been analyzed theoretically and experimentally. As the proportion of Babbitt increases, the composite structural bar presents a characteristic of ease of deflection.

A simple bicycle model considers only geometric and mass properties. Bicycle models considering compliance, tires, and rider posture are available. For the designer, it is important to know if the effect of geometric and mass properties on stability is correctly predicted by a simple bicycle model. Stability indices are calculated by means of bicycle models of increasing complexity. Results show that the simple model correctly predicts only the stability of the single modes.

We solve the issues based on the ANFIS with DE. It indicates that once the cutting parameters are determined, we can give better predictions of tool life and heights of cutting burrs compared with other models. We redesigned the ANFIS model and this model was optimized with new learning algorithm called DE. This model can export two outputs at the same time. Based on the ANOVA, the results show that the most effect on the tool life and height of cutting burrs are cutting speed and feed rate.

With the requirement of heavy load for pick-and-place operation, a new 3-DoF asymmetric translational parallel manipulator is invented in this paper. This manipulator is assembled by a kinematic limb with the parallel linear motion elements(PLMEs), and a single loop 2-UPR. Owning to the linear actuators directly connecting the moving and the fixed platforms, this parallel manipulator has high force transmission efficiency, and adapts to pick-and-place operation under heavy load.

the joint clearance error of the component is an important component for the structural parameter errors. In order to improve the accuracy of such mechanism, the possible errors were evaluated and on-line error compensation was carried out by control system for the purpose of accuracy machining. The error model of the working accuracy of the parallel mechanism was established in this paper.

To better help the mechanical design and structural optimization of bridge-type nano-positioners, an improved model was developed to describe the displacement amplification of the bridge-type mechanism in this paper. Comparative studies and experiments indicate that the proposed method can better capture the amplification performance for such systems, which can be potentially used in the design and optimization of bridge-type nano-positioners.

We sometimes meet the problem of linkage synthesis for 4 specified orientations. For example, we need to design an automobile seat based on spherical 4R linkage to move the driver to the ground. According to the traditional Burmester theory, most of the linkage solutions have motion defects, which lead to low computational efficiency. In this paper, a program package was developed under Matlab, which can quickly locate the feasible linkage solution under the guidance of solutions map.

The shaking of the Rotary forging machine has an important influence on the life of the equipment parts machining accuracy and surface profile of parts, reducing the production efficiency. This paper proposes a method to reduce shaking by changing eccentricity，obtained the design relationship of internal and external sleeves eccentricity, which can reduce the shaking in rotary forging press. This study improving the working state of the rotary forging machine and economic benefits.