In this paper, a learning nonlinear proportional integral derivative (PID) controller is developed for vaguely modeled systems under the influence of significant disturbance and noise. The control scheme generic in nature, but it applied specifically to micropositioning linear-piezoelectric motors paper. design does not require full mathematical model system. Simulation experimental results are provided highlight good motion performance achieved from scheme.

3D printing has emerged as one of the modern tissue engineering techniques that could potentially form scaffolds (with or without cells), which is useful in treating cardiovascular diseases. This technology attracted extensive attention due to its possibility curing disease and organ regeneration. In this paper, we have developed a novel rotary forming device, prepared an alginate–gelatin solution for fabrication vessel-like structures, further proposed theoretical model analyze parameters...

In line with the general trend of automation, spherical motion systems are increasingly required in applications such as robot joints, manipulators, orientation control systems, and angular alignment systems. this paper, a air bearing positioning system (SABS) aiming at providing highly precise rotational motions two degrees freedom is designed. The SABS mainly consists direct-drive voice coil actuators pneumatic bearing. This paper presents mechanical structure SABS. model identified based...

3D bioprinting has shown great promise in the field of tissue engineering, which offers a vital and significant platform for organ regeneration. Therefore, an increasing focus on bioprinting, coupled with growing knowledge cell–cell interaction cell encapsulation, driven researchers to discover preferable biomaterials that enable greatest possible reconstruct artificial organs different cells hydrogel. One important challenge is adapt materials selected improve survival rate. In this paper,...

Inverted pendulum can verify the effectiveness of controllers. Traditional inverted is driven by a rotational motor, and its control performance influenced friction gap transmission mechanism. We proposed an innovative Direct Driven Pendulum (dDIP) which consists (IP) mounted on stage ironless permanent magnet linear synchronous motor (IPMLSM). In this paper, structure dDIP first analyzed mathematic model built. Then, LQR controller designed numerical simulations in MATLAB are carried out....

3D bioprinting is an emerging technology that drives us to construct the complicated tissues and organs consisting of various materials cells, which has been in widespread use tissue engineering organ regeneration. However, protection accurate distribution cells are most urgent problems achieve reconstruction. In this article, a multinozzle multichannel temperature deposition manufacturing (MTDM) system proposed fabricate blood vessel with heterogeneous gradient hierarchical porous...

With the rapid development of construction automation, robots are gradually applied to building. Tile laying robot can effectively improve quality and efficiency tile construction. In order robotic laying, a control method based on position servo impedance is proposed realize laying. Further, in full filling rate improves reduction by using effective vibration eccentric vibrator. The experimental results show that this paper research have positive role promoting application technology...

In this paper, the Compact Form Dynamic Linearization based Model-Free Adaptive Control (CFDL-MFAC) algorithm in MIMO (Multiple Input Multiple Output) case is introduced first, then structure and model of polishing robot are given discussed. Next, CFDL-MFAC applied to control system. The simulation results show that CFDL model-free adaptive has a good performance, especially it can adaptively decouple coupled outputs for

In recent years, accelerative aging society is meeting the short supply of young and middle‐aged labor. Particularly, most people are reluctant to work in construction industry, which has caused labor cost floor tiling rise year by year. addition, requires workers continuously bend over or lean work, greatly jeopardizes physical health them. Therefore, advanced technology applied highly demanded replace traditional manual method. On context, automatic method may promote transformation...

In this paper, a novel controller is proposed to improve the trajectory tracking performance of direct drive ironless permanent magnet linear synchronous motor (ILPMLSM). The control scheme combines fast terminal sliding mode with iterative learning control. Specifically, which can predefine finite reaching time used as primary handle effect parametric uncertainties, unknown nonlinearities and external disturbances. A PD type employed secondary eliminate periodic errors. Computer simulation...

The biofabrication of multi-cellular tissues or organoids (MTOs) has been challenging in regenerative medicine for decades. Currently, two primary technological approaches are being explored: scaffold-based strategies utilizing three-dimensional (3D) bioprinting techniques and scaffold-free employing bioassembly techniques. 3D include jetting-based, extrusion-based, vat photopolymerization-based methods, Kenzan, fluid-based manipulation microfluid, bioprinting-assisted tissue emergence,...

Nowadays, TLS (terrestrial laser scanning) has been a relatively mature measuring equipment categorized to indoor robots, but it is not widely adopted in construction measurement at present. What accounts for its limited application are as follows: (1) the high cost of high‐accuracy LIDAR and (2) existing does possess self‐adaptation scanning planning takes no account efficiency point cloud processing consumption computing power. This paper proposes novel high‐efficiency method customized...

In this paper, the basic theory of repetitive control are summarized and modified controllers introduced. The steady-state error asymptotic stability condition presented. A CNC precision lathe implemented with system for machining elliptical pistons is constructed, which consists a linear servomechanism, computer controlled controller machine-tool. cutting tool driven directly by servomechanism in radial direction piston tracks section curve piston. Compared results performed traditional...

Data-driven control methods have no relations with any structural information, and it is designed only by the I/O data of controlled system. The model-free direct adaptive nonlinear predictive (MFDANPC) algorithm linearization tight format a class SISO generalized (GPC) based on data-driven theory applied to permanent magnet linear motor speed position control. design controller directly estimate prediction pseudo-partial-derivatives (PPD) derived on-line from input output information motion...

The definition and principle of Permanent Magnetism Linear Synchronous Motors(PMLSM) are given the control strategy called model-free is introduced. has been compared with current strategies such as classic PID algorithm. will be applied on linear motors based cSPACE system to prove validity stability for unknown mathematical model nonlinear motors.

3D vessel bioprinter is an emerging and prospect technology, which offers a functional platform to construct the biofabrication. In this paper, we have developed novel vascular forming device proposed theoretical analysis approach study motion synchronization. Using bioprinter, first established model analyze relationship among nozzle extrusion speed, speed servo motor speed; experiments were carried out verify results under all sorts of conditions, experimental show agreement with between...

Linear motor driven compressor has many outstanding advantages comparing with conditional by rotary motors, such as simple construction, low noise and considerable energy saving. This paper introduces a kind of linear the iterative learning control method to track sine curve. The result shows that ILC can make own better performance.