Tuanjie Li

Tuanjie Li
Xidian University · School of Mechano-Electronic Engineering

Ph.D.

About

137
Publications
12,807
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1,148
Citations
Additional affiliations
May 1999 - present
Xidian University
Position
  • Professor

Publications

Publications (137)
Article
Full-text available
Modular space structure has become a research hotspot in the aerospace field. In the microgravity and weak damping space environment, modular space structures may continuously vibrate due to the transient excitation caused by satellite attitude adjustment or space debris impact, which will make the structure unstable. Therefore, a passive vibration...
Article
Tensegrity is a very attractive structure due to its unique advantages of self-equilibrium, lightweight, small compression volume, and low control cost. However, both the shape and the dynamic behavior of tensegrity are susceptible to environmental change, which has limited the development of the structure in high-accuracy applications. We develop...
Article
Purpose The inchworm actuator is widely applied in space industry. One of the major issues in space instrumentation is the reliability, especially under space thermal load. The purpose of this paper is to present a numerical calculation method for the inchworm actuator reliability with considering the effect of space temperature. Design/methodolog...
Article
Full-text available
The deployment of a modular truss antenna reflector is relied on the driven energy of the springs between the components of the structure. The deployment process is characterized by fast speed and large impact. In order to study the impact characteristics of antenna deployment on the boundary, the deployment dynamic analysis of a modular truss ante...
Article
Out-of-plane flexural and in-plane extensional motions are independently analyzed in available studies of multiple scattering due to the assumption of the consistent mid-plane between the scatterer and host medium. When mid-planes of the scatterer and the host medium are inconsistent, such as flat-bottomed indentations, the coupled out-of-plane fle...
Article
Full-text available
Because of manufacturing errors, measuring errors, and unpredictable service environment, the cable net structure to be further adjusted is in an uncertainty state. In this paper, the uncertain factors including elastic deformation, thermal deformation, and measurement uncertainties are considered as fuzzy variables, which are equivalent into fuzzy...
Article
Full-text available
Deployable space structure technology is an approach used in building spacecraft, especially when realizing deployment and folding functions. Once in orbit, the structures are released from the fairing, deployed, and positioned. With the development of communication, remote-sensing, and navigation satellites, space-deployable structures have become...
Article
As the dynamic random access memory (DRAM) chip tends to the larger storage capacity by die stacking, the 3D die stacking requires thermal modeling for fast temperature predicting and initial design. This work presents a theoretical model capable of fast calculating and optimizing the temperature of each die. The improved thermal network defines eq...
Article
The active shape adjustment of large-diameter mesh antennas has been widely explored for achieving high on-orbit performances. The surface reconfiguration of the cable net reflector is the essential precondition for active shape adjustment of mesh antennas. In this paper, we proposed a surface reconfiguration method based on the modal theory and tr...
Article
The negatively refracted flexural wave is explored for phononic thin plates consisting of periodic holes and inclusions based on the effect of backward waves. Dispersion curves of these two types of phononic thin plates are calculated by using the multipole method, and the backward wave effect has been clearly found in their band diagrams. By using...
Article
In order to enhance tribological performance of both water-based and oil-based lubricant, the SiO2 nanoscale ionic liquid (NIL), an amphiphilic lubricant additive, was prepared by using a sulfuric acid terminated organo-silane as corona and polyether amine as canopy. Various analytical techniques were used to characterize the SiO2 NIL and stability...
Article
Full-text available
State jump has been experimentally observed in space deployable structures working in alternating temperature environments. State jump is a phenomenon in which the geometric shape of the structure changes after the temperature loading and unloading process, which makes the working accuracy of the space deployable structure intrinsically unpredictab...
Article
Due to kinematic function requirements, deployable structures inevitably have many clearance joints. The existence of clearance joints not only reduces the structural stiffness but also leads to complex nonlinear dynamic characteristics. This paper proposed a general numerical method based on the wave motion theory, which is able to analyze these c...
Article
Full-text available
This paper presents a novel deployable hexagonal prism module for parabolic cylinder antennas that exhibit characteristics of geometric scalability. The hexagonal prism module consists of six basic rib mechanisms distributed along the axis and parabolic directions of the parabolic cylinder. The basic rib mechanism along the axis direction is design...
Article
This paper proposed a novel plate-harvester system with local oscillators for energy harvesting of flexural wave propagation. The local oscillator inside a hole was constructed by a piezoelectric composite beam of which two ends were respectively anchored to the host plate and the inner plate. The semi-analytical model of the proposed plate-harvest...
Article
Full-text available
Indefinite chill (IC) roll and high speed steel (HSS) materials have been widely employed to manufacture work rolls as latter and former stands in hot rolling mills. The oxidation of work rolls is of importance for the surface quality of the rolled workpieces. The isothermal oxidation of the IC and HSS materials was conducted at 650 °C and 700 °C i...
Article
A piezoelectric ceramics (PZT) inchworm actuator is designed and tested in this work. The proposed actuator is mainly composed of a driving mechanism and two clamping mechanisms. The dynamical model of the actuator is established with considering the output nonlinearity of the PZT. The friction between the baffle and the clamping claw is calculated...
Article
Base oils containing different nanoparticles with varying concentrations are prepared, in which SiO 2 , TiO 2 and ZnO (20 nm) nanoparticles are employed to improve the lubrication performance. Their tribological properties are evaluated on a ball-on-disk tribometer. The results show that the nano-additive lubricants exhibit a good friction reductio...
Article
Full-text available
Due to the time‐dependent load‐elongation characteristic of cables, the cable‐net reflector antenna shows a creep and recovery behaviour which has limited the development of the cable‐net reflector antenna with high frequency and high stability. Therefore, this study is dedicated to investigating a time‐dependent radiation pattern analysis method f...
Article
In this paper, single material beams as the basic structural members in the traditional periodic frame structure were extended to the ones of multi-material composite beam with locally resonant (LR) unit. Based on the spectral element method and the topological characteristics of structure, an assembly method of the stiffness matrix for virtual ful...
Article
This paper demonstrates the superlensing effect of flexural waves by phononic plates with the negative index of refraction. The phononic plate consists of a square lattice of spring-mass resonators attached to an infinite thin plate. The periodic resonator array induces a resonant band gap between the first and second dispersion curves of band stru...
Article
This paper proposes a semi-analytical method for flexural wave scattering by cylindrical annular inclusions of varying thickness on an infinite thin plate. The thickness of inclusions is assumed to vary in arbitrary power form along the radial direction. In the numerical method, analytically linear relationships between expansion coefficients of ex...
Article
Offset-feed elliptical aperture reflectors have better mechanical and electrical performance than circular aperture reflectors and are an inevitable trend for the future development of high-precision space-borne antennas. The surface mesh geometry is crucially important to ensure surface accuracy and effective aperture of mesh reflectors. This pape...
Article
This paper investigates the generation of passive intermodulation (PIM) in coaxial connectors during vibration. A series of experiments were designed and the simulation model and method were proposed for understanding these phenomena. We found that PIM is mainly influenced by the contact stress and contact surface roughness during vibration. Thus,...
Article
During assembly of a cable-net reflector, surface adjustments must be made to meet the stick accuracy requirement of a space mission by changing the lengths of adjustable cables. It is desirable to find the optimum adjustment amount based on the current state of the cable-net reflector. However, all data needed to establish an accurate simulation m...
Article
In order to improve the stability of brushless DC (BLDC) motors at low speed, a high-stability position-sensorless control method is proposed in this paper. Because the back electromotive force (EMF) is very small at low speed, a novel algorithm is proposed to detect the zero crossing point (ZCP) of back EMF accurately. First, the line-to-line back...
Article
This paper investigated all-angle negative refraction phenomenon of flexural wave propagating on phononic thin plates. The phononic thin plate consisted of a host plate and a periodic lattice of multilayer cylindrical inclusions. A general multipole method was firstly developed to calculate the dispersion curves of phononic thin plates. With the pr...
Article
In order to satisfy the high efficiency and high precision of collaborative robots, this work presents a novel trajectory planning method. First, in Cartesian space, a novel velocity look-ahead control algorithm and a cubic polynomial are combined to construct the end-effector trajectory of robots. Then, the joint trajectories can be obtained throu...
Article
The accurate surface reconstruction of deformable reflectors is demanded by the onorbit surface adjustment of space antennas. This paper proposes a novel surface reconstruction method for deformable reflectors via combining Zernike polynomials with radio holography. First, the mathematical model of radio holography is derived based on Zernike polyn...
Article
When working in space environment, cable net structures suffer multisource errors including dimension errors, material parameter errors and external excitation errors. Thus, an interval force density (IFD) method was proposed for the pretension design of cable net structures under multi-errors to increase their performance robust and reliable in ou...
Article
Clearance is inevitable in the deployable mechanisms due primarily to the kinematic function requirements. This phenomenon affects the dynamic performances of deployed structures negatively. In this paper, the wave analysis of dynamic characteristics of planar structures with revolute clearance joints is developed by spectral element method. First,...
Article
The passive intermodulation (PIM) has gradually become a serious electromagnetic interference in the high-power and high-sensitivity RF/microwave communication system with the existence of the nonlinear metal-to-metal (MM) contacts. This paper proposes a finite difference time domain (FDTD) method for PIM analysis of nonlinear MM contacts. There ar...
Article
The space environments and special mission demands require large-scale and high shape accuracy cable net structures. The vibration control is an essential issue for shape control and performance conservation of large flexible cable net structures. This paper investigates the hybrid active wave/mode control of space prestressed taut cable net struct...
Article
This paper is concerned with elastic wave propagation and vibration band gaps in periodic beams formed by alternating combinations of various materials with the same geometric parameters. Such composite periodic systems have the similar feature of filtering characteristics of periodic beams. The study is performed by using an exact analytical appro...
Article
A mechanism composed of generalized links and kinematic pairs is defined as the generalized mechanism, which is capable of transforming motions and forces. It is an expansion of traditional rigid mechanisms and can better reflect the material characteristics. The constraint screw systems of limbs were constructed according to the screw description...
Article
The design of large high-precision antenna is one of the key factors restricting the application and development of antenna. This paper presents a design method for high precision large-scale umbrella-shaped antenna. Studies have been performed on the configuration, cable net forming, mesh optimization, error analysis and rib design to achieve the...
Article
Full-text available
We investigated the band gap structures in two-dimensional phononic crystals with composite scatterer. The composite scatterers are composed of two materials (Bragg scattering type) or three materials (locally resonance type). The finite element method is used to calculate the band gap structure, eigenmodes and transmission spectrum. The variation...
Article
Full-text available
Because the nonlinearity of contact junctions in a wire mesh is the main source of passive intermodulation (PIM) generation, this work aims to analyze the PIM problem of single contact junctions. This work first derives the formulas of micro-contact effects, which reveals the mathematical relationship between the contact force and the micro-contact...
Article
Due to the uncertainties of material, geometrical and load parameters, dynamic responses of actual engineering structures are uncertain. The paper investigates dynamic responses of uncertain frameworks by combining the interval method with the traveling wave method. The uncertainties of material, physical dimension and loads are firstly characteriz...
Chapter
Compared with traditional mechanisms, a new class of mechanism considering both the rigid and the flexible elements is proposed to satisfy the demands of modern engineering in this paper. This class of mechanism is named as generalized mechanism, and they consists of generalized links and kinematic pairs. First, based on screw algebra, we derive th...
Article
Cable-membrane structure is a kind of flexible tension structures, of which both cables and membranes are lack of bending and compressing stiffness. In order to reduce the nonlinearity and the strong coupling between its geometric shape and internal stress distribution to improve the computational efficiency and convergence, this paper developed an...
Article
For the passive intermodulation (PIM) problem of nonlinear contact on microwave connectors, an effective method is presented to improve the computational accuracy of PIM. First of all, the contact stress distribution on contact surface is analyzed by finite-element method based on the Weierstrass–Mandelbrot model. The contact stress and real area o...
Article
In this paper, a stress wave model is established to describe the three states (separate, contact and impact) of clearance joints. Based on this stress wave model, the propagation characteristics of stress wave generated in clearance joints is revealed. First, the stress wave model of clearance joints is established based on the viscoelastic theory...
Article
Pillow distortion has become one significant limiting factor to the development of space mesh reflector antennas toward large-scale extension and high surface accuracy. However, the current state of the art about pillow distortion have great limitations in practical application, because they are mostly based on the assumptions that the stress appli...
Article
Based on the elastic fracture mechanics, we establish a continuous model of one-dimensional Euler–Bernoulli cracked beam using the traveling wave method, and analyze the damage characteristics of cracked beam through the changes of deflection and power flow response. First, the control equation of bending vibration of healthy beam is deduced by tra...
Article
Passive intermodulation (PIM) is a complex problem in high-power microwave devices and satellite communications. In this paper, an effective calculation method is proposed for revealing the mathematical model between torque and PIM power levels of microwave devices. First, the analytical formula for the intermodulation voltage is derived based on t...
Article
The wire mesh of a space mesh reflector antenna is a core component that reflects electromagnetic waves, greatly influencing the functions of the antenna. Due to the complex weaving structure of the wire mesh, there are thousands of contact nodes per square meter. Therefore, modeling and analyzing the wire mesh becomes very difficult. It is both ti...
Article
Passive intermodulation (PIM) is a complex problem in high-power microwave devices and satellite communications. In this paper, an effective calculation method is proposed for predicting PIM power levels of the cascaded microwave devices. First of all, the analytical formula of intermodulation voltage is derived based on the nonlinear I–V character...
Article
In this paper, an alternative approach was developed for the form-finding of cable-membrane structures. The prestress of a triangular finite element was firstly equivalent to the axial force densities and uniform vertical loads on the three edges. The static equations and tangent stiffness matrices of the cable-membrane were then formulated with th...
Article
Compared with traditional mechanisms consisted of rigid links, a new kind of mechanism considering both the rigid and the flexible elements is proposed and defined to satisfy the demands of modern engineering in this paper. This kind of mechanism is named the generalized mechanism. The weighted topological graph and the corresponding adjacency and...
Article
The wave scattering method is presented to analyze dynamic response of frameworks with stochastic parameters. First, with the uncertain physical, geometric, and loading properties in consideration, the stochastic waveguide equations containing the axial, torsional and flexural wave modes are established. Second, the stochastic wave scattering equat...
Article
The wave motion equations of a tapered beam with respect to axial, torsional and flexural deformations are deduced including the transmission and waveguide equations. Combining the force equilibrium and displacement coordination conditions at the junction, we obtain the relation between the wavenumber and frequency, and the band gap properties of p...
Article
In the process of surface precision adjustment of cable net structures, the establishing variable configuration of cable net structures is the basis and precondition for implementation of surface adjustment. Due to the limitation of measurement errors and uncertainties, the measured information including node location, boundary conditions and cable...
Article
The generalized deployable mechanism is composed of generalized links and generalized kinematic pairs. The generalized links include the flexible members, springs, and cables etc. The generalized kinematic pairs include the preloaded kinematic pairs and flexible hinges etc. The generalized deployable mechanism consists of generalized deployable uni...
Article
The Schapery's nonlinear viscoelastic theory and nonlinear force-density method have been investigated to analyze the creep and recovery behaviors of space deployable mesh reflectors in this paper. Based on Schapery's nonlinear viscoelastic theory, we establish the creep and recovery constitutive model for cables whose pretensions were applied step...
Article
Mesh reflectors are uncertain structures because of the existing errors of dimension and material in the procedure of design and manufacture. These uncertainties have significant impacts on the mechanical and electrical properties, which must be considered during the design phase. Three directly related factors of cable uncertainties in mesh reflec...
Article
The main purpose of the paper is to investigate the effects of structural parameters of deployable reflectors on their mean cable tensions. The proportional relations between spatial and plane cable nets are firstly explored on the basis of projection principle. By the means of obtained proportional relations, the analytical expressions between the...
Article
This paper investigates a whole process for the form-finding analysis of cable net reflector antennas with creep and recovery behaviors in consideration. Both the force-density and nonlinear finite element methods are extended together to establish and solve the nonlinear optimization model for the form-finding analysis. First, the equal forcedensi...
Article
Microwave loads are used to improve the matching performance of circuits and absorb the microwave energy. The microwave loads generate the joule heat to affect the electrical resistivity after consuming microwave energy which may produce the passive intermodulation (PIM). Electro-thermal compling leads to the difference of the time scale which prod...
Article
Tensegrity systems have been used in several disciplines such as architecture, robots and antennas. However, just a few works in literature have addressed the possibility of using tensegrity systems in sensor applications. In this paper, a tensegrity based weighing machine was proposed. An energy method was used to perform the equilibrium analysis...
Article
Full-text available
A tensegrity-based water wave energy harvester is proposed. The direct and inverse kinematic problems are investigated by using a geometric method. Afterwards, the singularities and workspaces are discussed. Then, the Lagrangian method was used to develop the dynamic model considering the interaction between the harvester and water waves. The resul...
Article
Tensegrity systems are proposed to be used in several disciplines due to their advantages. The force-displacement relationships play an important role for their applications. However, few developments are found to study the force-displacement relationship considering the bars’ interference. In this work, we compute the force-displacement relationsh...
Article
The main purpose of this paper is to present a pretension design method for space deployable mesh reflectors under multi-uncertainty. There exist multi-source errors in space deployable structures, such as dimensional error, imperfect material properties, and thermal error in space environment. The error which results in the structural uncertaintie...
Article
The main purpose of this paper is to design the geodesic cable net for space deployable mesh reflectors by means of the geodesic differential equation, which is different from the traditional quasi-geodesic cable net. In order to generate the geodesic cable net, two main problems must be addressed. One is to generate the geodesics on the paraboloid...
Article
In this paper, the linear dynamic analysis and active control of prestressed taut cable net structures are investigated by the wave scattering method. Wave motion equations of cables are firstly derived to obtain the wave dispersion characteristics, which are the combinations of the longitudinal tensile wave equations of bars and transverse wave eq...
Article
To solve the problem that the conventional floating wave power device can not transform the rotational kinetic energy into electric energy, a novel wave energy harvesting device based on tensegrity parallel mechanisms is proposed. The dynamic model of the novel device is developed on the basis of Airy's linear wave theory and Lagrange's equation. T...
Article
Large deployable high-frequency mesh antennas are being envisioned for future space missions. The static determinacy is required to ensure the long-term dimensional stability of cable net reflectors of mesh antennas under extreme space environments. In this paper, the design methodologies for creating statically determinate cable net topology confi...
Article
A pretension design method based on the projection principle is proposed for space deployable mesh reflector antennas. First, the equilibrium tension of the plane cable net structure is obtained by a force equilibrium method. Then, the obtained cable tensions of the plane cable net structure are projected to the spatial cable net reflector to obtai...
Article
Active surface adjustment of cable net structures is becoming significant when large-size cable net structures are widely applied in various fields, especially in satellite antennas. A general-duty adjustment method based on active cables is proposed to achieve active surface adjustment or surface profile reconfiguration of cable net structures. Pi...
Article
The knitted wire mesh is often used as a reflecting surface of large deployable antennas. Because different wire meshes have different electrical properties, it is very important and necessary to research the analysis method of mechanical properties of wire meshes. The mechanical analysis of the wire mesh is very difficult because of the complex st...
Article
Tensegrity mechanisms have several attractive characteristics such as light-weight, deployable and easily modeled. In this paper, the stiffness and dynamics of a planar class-2 tensegrity mechanism are studied. Firstly, the solutions to the kinematic problems are found by using a method of reduced coordinates. Then, the stiffness of the mechanism i...
Article
Cable-beam structures characterized by variable stiffness nonlinearities are widely found in various structural engineering applications, for example in space deployable structures. Space deployable structures in orbit experience both high temperature caused by sun's radiation and low temperature by Earth's umbral shadow. The space temperature diff...
Article
To design large space deployable antennas with lightweight and stable cable-net structures, a form-finding method is presented to design equal tension cable networks. The nodes of the networks are regarded as the points that move on the ideal reflective surface. The nodes move on the ideal surfaces of the mesh antennas under the action of the resul...
Article
For convenience of application, an analytic algorithm was proposed to design the pretensions of asymmetrical ring truss cable-net space-borne antennas. The projection equations of the main net in the plane perpendicular to the central line of the ring truss were given at first, and then the pretensions of the main net were obtained using the formul...