Journal articles: 'Platform stabilization'

1

Votrubec, Radek. "Stabilization of Platform Using Gyroscope." Procedia Engineering 69 (2014): 410–14. http://dx.doi.org/10.1016/j.proeng.2014.03.006.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Potakhov, D. A. "Railway crane platform stabilization system." VNIIZHT Scientific Journal 80, no. 3 (June 30, 2021): 160–67. http://dx.doi.org/10.21780/2223-9731-2021-80-3-160-167.

Full text

Abstract:

When operating a railway crane in curved sections of the track, derailment of wheelsets of the crane bogies from the rail track when it is displaced during hanging on the outriggers, wheelset of the bogie missing the rail track after the work has been completed or the crane has been down from the outriggers, which significantly affects performance of loading and unloading operations. One of the reasons for the occurrence of such dangerous situations is the not strictly horizontal position of the non-rotating platform of the railway crane.Railway cranes are part of recovery trains designed to eliminate the consequences of rolling stock derailments. A priority for recovery trains is to reduce the time it takes to eliminate the consequences of traffic accidents, which can be achieved through the use of new or improved devices or methods.The article describes a system of automatic stabilization (leveling) of the platform of a railway crane (for example, EDK 500/1 crane type) when it moves in curved sections of the track (the motion of a railway crane at relatively low speeds (up to 50 km/h) is considered).In order to study the modernized technical system (a crane equipped with an automatic platform stabilization system), its mathematical simulation is carried out. At the initial stage, a solidstate digital model of a railway crane in combination with a section of a railway track is created in the SolidWorks computer-aided design system; developed solid model is translated into the Sim- Mechanics MATLAB environment. Further, in order to improve the adequacy of modeling, the developed dynamic model is being finalized by integrating MATLAB program libraries (SimMechanics, SimHydraulics, Fuzzy Logic Toolbox, etc.) to take into account the interaction of elements of different physical nature. Results of modeling modernized technical system are presented, which confirm the advisability of using the stabilization system on railway cranes when passing curved track sections.

APA, Harvard, Vancouver, ISO, and other styles

3

Cameron, D. S., and N. A. Kheir. "Platform Stabilization with Novel Active Suspension." IFAC Proceedings Volumes 33, no. 26 (September 2000): 71–75. http://dx.doi.org/10.1016/s1474-6670(17)39123-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Lindsey, W. A., A. M. Spagnuolo, J. C. Chipman, and M. Shillor. "Numerical simulations of vehicle platform stabilization." Mathematical and Computer Modelling 41, no. 11-12 (May 2005): 1389–402. http://dx.doi.org/10.1016/j.mcm.2003.10.054.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Fenu, Beatrice, Valentino Attanasio, Pietro Casalone, Riccardo Novo, Giulia Cervelli, Mauro Bonfanti, Sergej Antonello Sirigu, Giovanni Bracco, and Giuliana Mattiazzo. "Analysis of a Gyroscopic-Stabilized Floating Offshore Hybrid Wind-Wave Platform." Journal of Marine Science and Engineering 8, no. 6 (June 15, 2020): 439. http://dx.doi.org/10.3390/jmse8060439.

Full text

Abstract:

The energy innovation scenario sees hybrid wind-wave platforms as a promising technology for reducing the variability of the power output and for the minimization of the cost of offshore marine renewable installations. This article presents a model that describes the installation of a 5 MW wind turbine on a floating platform designed by Fincantieri and equipped with gyroscopic stabilization. The use of gyros allows for the delivery of platform stabilization by damping the wave and wind induced motion on the floater and at the same time producing extra power. Shetland Island was chosen as the reference site because of its particularly harsh weather. Final results show that the total production of power in moderate and medium climate conditions is considerable thanks to the installation of the gyro, together with a significant stabilization of the platform in terms of pitching angle and nacelle acceleration.

APA, Harvard, Vancouver, ISO, and other styles

6

Ermis, Kemal, Mehmet Caliskan, and Muammer Tanriverdi. "DESIGN OPTIMIZATION OF MOVEABLE MOMENT STABILIZATION SYSTEM FOR ACCESS CRANE PLATFORMS." Acta Polytechnica 61, no. 1 (March 1, 2021): 219–29. http://dx.doi.org/10.14311/ap.2021.61.0219.

Full text

Abstract:

The popularity of aerial work platforms is rapidly increasing in the mechanization industry. As a result, the safety and structural strength of aerial work platforms should be prioritized.In this study, the mathematical model of a reconstructed aerial work platform was developed and a 3D model was created using the Solidworks software. A dynamic analysis was then performed to improve various structural parameters of the aerial work platform. The analysis was carried out using solid modelling, finite elements, and dynamic transient analysis. In compliance with international structural standards, the weight distribution was reconstructed after placing a mass behind the turret.The results of the dynamic transient analysis were compared with the mathematical model and validated. Then, the effect of the mass placed behind the turret on the machine was examined. The lateral tipping distance of the static work platform was found to have increased from 15.9m to 17.08 m. The structure of the aerial work platform was improved using a structural and dynamic analysis approach. It was also discovered that the machine efficiency could be further increased by ensuring that the balancing weight is moved further away from the tower centre by a hydraulic-based system and controller.

APA, Harvard, Vancouver, ISO, and other styles

7

Alexandrov, V. V., B. Ya Lokshin, L. Gomez Esparza, and H. A. Salazar Ibargüen. "Stabilization of a platform under wind loads." Journal of Mathematical Sciences 146, no. 3 (October 2007): 5863–76. http://dx.doi.org/10.1007/s10958-007-0402-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Lindner, Tymoteusz, Dominik Rybarczyk, and Daniel Wyrwał. "Stabilisation problem in biaxial platform." Archives of Mechanical Technology and Materials 36, no. 1 (December 1, 2016): 65–69. http://dx.doi.org/10.1515/amtm-2016-0012.

Full text

Abstract:

Abstract The article describes investigation of rolling ball stabilization problem on a biaxial platform. The aim of the control system proposed here is to stabilize ball moving on a plane in equilibrium point. The authors proposed a control algorithm based on cascade PID and they compared it with another control method. The article shows the results of the accuracy of ball stabilization and influence of applied filter on the signal waveform. The application used to detect the ball position measured by digital camera has been written using a cross platform .Net wrapper to the OpenCV image processing library - EmguCV. The authors used the bipolar stepper motor with dedicated electronic controller. The data between the computer and the designed controller are sent with use of the RS232 standard. The control stand is based on ATmega series microcontroller.

APA, Harvard, Vancouver, ISO, and other styles

9

Königseder, Franz, Wolfgang Kemmetmüller, and Andreas Kugi. "Attitude control strategy for a camera stabilization platform." Mechatronics 46 (October 2017): 60–69. http://dx.doi.org/10.1016/j.mechatronics.2017.06.012.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Pérez, C., and F. R. Rubio. "Inertial Stabilization Controller for a 2 DOF Platform." IFAC Proceedings Volumes 34, no. 29 (October 2001): 97–102. http://dx.doi.org/10.1016/s1474-6670(17)32800-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Verma, Mohit, Vicente Lafarga, Mael Baron, and Christophe Collette. "Active stabilization of unmanned aerial vehicle imaging platform." Journal of Vibration and Control 26, no. 19-20 (February 3, 2020): 1791–803. http://dx.doi.org/10.1177/1077546320905494.

Full text

Abstract:

The advancement in technology has seen a rapid increase in the use of unmanned aerial vehicles for various applications. These unmanned aerial vehicles are often equipped with the imaging platform like a camera. During the unmanned aerial vehicle flight, the camera is subjected to vibrations which hamper the quality of the captured images/videos. The high-frequency vibrations from the unmanned aerial vehicle are transmitted to the camera. Conventionally, passive rubber mounts are used to isolate the camera from the drone vibrations. The passive mounts are able to provide reduction in response near the resonance. However, this comes at the cost of amplification of response at the higher frequency. This article proposes an active vibration isolation system which exhibits improved performance at the higher frequencies than the conventional system. The active isolation system consists of a contact-less voice coil actuator supported by four springs. Experiments are carried out to study the effect of vibrations on the quality of images captured. The characterization of drone vibrations is also carried out by recording the acceleration during different flight modes. The performance of the proposed isolation system is experimentally validated on a real drone camera subjected to the recorded drone acceleration spectrum. The isolation system is found to perform better than the conventional rubber mounts and is able to reduce the vibrations to a factor of one-fourth. It can be effectively used to improve the image acquisition quality of the unmanned aerial vehicles.

APA, Harvard, Vancouver, ISO, and other styles

12

Dogruer, CU, and Bora Yildirim. "Design of a vibration-free platform: Stabilization of a beam mounted on bicycle model of a car." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 232, no. 22 (December 27, 2017): 4113–27. http://dx.doi.org/10.1177/0954406217749266.

Full text

Abstract:

Many high-precision measurement and control devices must be mounted on vibration-free platforms. Accuracy of those devices’ output are adversely affected by the base excitation motion, so motion of these platforms must be isolated from the excitation source. In this paper, a flexible platform, which is mounted on a car, is considered as a base on which many such measurement and control devices can be attached. To this end, mixed finite element and lumped parameter model of the platform and vehicle are used to derive the model of such a system; this results in a discrete-model with finite degree of freedom. This lumped parameter model of the system is then controlled by a linear quadratic regulator, which minimizes the amplitude of vibration at finite number of points on the platform. The mathematical model of this system was simulated on a computer and it has been shown that it is possible to minimize the vibration of this flexible platform.

APA, Harvard, Vancouver, ISO, and other styles

13

Craig, Chesney E., and Michail Doumas. "Slowed sensory reweighting and postural illusions in older adults: the moving platform illusion." Journal of Neurophysiology 121, no. 2 (February 1, 2019): 690–700. http://dx.doi.org/10.1152/jn.00389.2018.

Full text

Abstract:

We investigated whether postural aftereffects witnessed during transitions from a moving to a stable support are accompanied by a delayed perception of platform stabilization in older adults, in two experiments. In experiment 1, postural sway and muscle cocontraction were assessed in 11 healthy young, 11 healthy older, and 11 fall-prone older adults during blindfolded stance on a fixed platform, followed by a sway-referenced platform and then by a fixed platform again. The sway-referenced platform was more compliant for young adults, to induce similar levels of postural sway in both age groups. Participants were asked to press a button whenever they perceived that the platform had stopped moving. Both older groups showed significantly larger and longer postural sway aftereffects during platform stabilization compared with young adults, which were pronounced in fall-prone older adults. In both older groups elevated muscle cocontraction aftereffect was also witnessed. Importantly, these aftereffects were accompanied by an illusory perception of prolonged platform movement. After this, experiment 2 examined whether this illusory perception was a robust age effect or an experimental confound due to greater surface compliance in young adults, which could create a larger perceptual discrepancy between moving and stable conditions. Despite exposure to the same surface compliance levels during sway-reference, the perceptual illusion was maintained in experiment 2 in a new group of 14 healthy older adults compared with 11 young adults. In both studies, older adults took five times longer than young adults to perceive platform stabilization. This supports that sensory reweighting is inefficient in older adults. NEW & NOTEWORTHY This is the first paper to show that postural sway aftereffects witnessed in older adults after platform stabilization may be due to a perceptual illusion of platform movement. Surprisingly, in both experiments presented it took older adults five times longer than young adults to perceive platform stabilization. This supports a hypothesis of less efficient sensory reintegration in this age group, which may delay the formation of an accurate postural percept.

APA, Harvard, Vancouver, ISO, and other styles

14

Qi, Chang Song, Hong Jun Pan, and Yan Le Wang. "Design and Realization of Two-Axis Horizontal Stabilized Platform Based on Self-Correction Control Method." Applied Mechanics and Materials 152-154 (January 2012): 1276–80. http://dx.doi.org/10.4028/www.scientific.net/amm.152-154.1276.

Full text

Abstract:

To enhance the accuracy of stabilization, this paper presents a design of two-axis horizontal stabilization platform system, which is based on the combination of gyroscope and inclinometer sensors. The self-correction control method is put forward to solve the system error caused by gyroscope zero drift in traditional gyro stabilized platform, which works in the way of revising the gyroscope zero coefficient, according to the real-time attitude information feed backed by inclinometer sensors fixed in objective platform.

APA, Harvard, Vancouver, ISO, and other styles

15

Wei, Li, Zhang, Feng, Zhang, Li, and Lu. "Optimization of a New High Rotary Missile-Borne Stabilization Platform." Sensors 19, no. 19 (September 24, 2019): 4143. http://dx.doi.org/10.3390/s19194143.

Full text

Abstract:

The passive semi-strapdown roll stabilized platform is an inertial platform, which can isolate the rolling of a projectile body by a special mechanical device. In the passive semi-strapdown roll stabilized platform, the bearing device plays an important role in isolating the rolling of the projectile body. The smaller the friction moment of bearing, the smaller the swing angular velocity of the platform, the smaller the range of inertial sensors required, the higher the accuracy of the navigation solution. In order to further reduce the swing angular velocity of the platform and improve the navigation accuracy, the bearing nested structure that could reduce the friction torque is proposed. Combined with the working principle of the passive semi-strapdown roll stabilized platform, the mechanical calculation model of friction at the moment of bearing the nested structure was established. A series of simulation analysis and tests showed that the output stability value of the friction moment was 47% that of a single bearing; the roll rate of the platform based on the bearing nested structure decreased to 50% of that based on the single bearing structure; the position and attitude errors measured of the platform based on the bearing nested structure decreased to more than 50% of that based on the single bearing structure. It showed that the bearing nested structure could effectively reduce the friction moment, improve the axial reliability of the bearing, and provide a more stable working environment for the passive semi-strapdown roll stabilized platform.

APA, Harvard, Vancouver, ISO, and other styles

16

Li, Anliang, Hong Cai, Shifeng Zhang, and Xibin Bai. "Robust Stabilization Control for the Floated Sensor Inertial Platform." Sensor Letters 11, no. 11 (November 1, 2013): 2094–97. http://dx.doi.org/10.1166/sl.2013.2970.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Wang, Yawei, Weihu Zhou, Xiaoquan Han, Zhongyu Wang, and Jinbin Ding. "Strap‐down stabilization for multi‐load optoelectronic imaging platform." Aircraft Engineering and Aerospace Technology 84, no. 2 (March 16, 2012): 94–102. http://dx.doi.org/10.1108/00022661211207901.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Tkachuk, Andrii, Olena Bezvesilna, Oleksandr Dobrzhanskyi, Anna Ostapchuk, and Mykola Horodyskyi. "Information and measurement system of weapon stabilization parameters based on precision piezoelectric sensitive element." E3S Web of Conferences 166 (2020): 05005. http://dx.doi.org/10.1051/e3sconf/202016605005.

Full text

Abstract:

The structure and principle of information and measurement system performance of weapon stabilization are described. Established, that the classical stabilization system consists of a stabilizing platform of the sensitive element (or block of sensitive elements), defining the absolute angle of platform α rotation, the sensing element output signal amplifier, engines and tachometers. The classical system of indirect stabilization is reviewed, its mathematical description is made. A new precision sensitive element for the information and measurement system of weapon stabilization is suggested, the principle of its performance is introduced. Constructive methods of measurement accuracy improvement in the new sensitive element are analyzed. A simulation of the new sensitive element performance influenced by the external disturbances is carried out.

APA, Harvard, Vancouver, ISO, and other styles

19

Veyna, Uriel, Sergio Garcia-Nieto, Raul Simarro, and Jose Vicente Salcedo. "Quadcopters Testing Platform for Educational Environments." Sensors 21, no. 12 (June 16, 2021): 4134. http://dx.doi.org/10.3390/s21124134.

Full text

Abstract:

This work focuses on the design and construction of an experimental test bench of three degrees of freedom with application in educational environments. It is constituted by a gyroscopic structure that allows the movements of a quadcopter to analyze the control systems. In this context, the main features of the mechanical and electronic design of this prototype are described. At the same time, the main characteristics with respect to existing platforms are highlighted in aspects such as: system autonomy, cost, safety level, operation ranges, experimental flexibility, among others. The possible controller design approaches for quadcopter stabilization can extend to many basic and advanced techniques. In this work, to show the operation and didactic use of the platform, the development of the controller for tilt angle stabilization under two different approaches are presented. The first approach is through PID control, oriented for undergraduate students with basic level in control theory. The second approach is by means of State Feedback, oriented to students with more advanced level in this field. The result of this work is an open test bench, enabled for the experimentation of control algorithms using Matlab-Simulink.

APA, Harvard, Vancouver, ISO, and other styles

20

Ibrahim, Ezz, Tarek Elnady, Mohamed Hassan, and Ibrahim Saleh. "Modelling, transient response and hydraulic behaviour of 2DOF stabilization platform." FME Transactions 48, no. 4 (2020): 833–40. http://dx.doi.org/10.5937/fme2004833e.

Full text

Abstract:

The main part of the hydraulic circuit of the hydraulic stabilization platform (HSP) is the electro-hydraulic servo valve (EHSV), which is very expensive due to its manufacturing requirements, so the proper selection for the geometrical configuration of electro hydraulic servo valve (EHSV) and maintaining the system stability are the main goal for establishing HSP. Also improving the performance of (HSP) to achieve the position tracking in two degrees of freedom (2DOF) based on modifying the different parameters of the hydraulic circuit (actuator size - hydraulic servo actuator geometric configuration - different load on the platform) to achieve the best performance. The system offers a proposal for an upper stabilized platform with moving lower base to be used with ships to achieve a stabilization condition for many purposes such as radar. MATLAB Simulink and Simscape-multibody has been used in modeling the system. Changing the different parameters in the program block library input data (orifice area and spool slot width) to achieve best configuration of the system to be stabilized is discussed. The results show that using 0.6 mm² servo valve orifice area and more raises the system pressure and has a bad effect on system stability, also using 4 mm servo valve slot width has more fluctuation in the system pressure in the transient time than using (3, 2 or 1)mm slot width until approaching stable condition but has a better effect on system stability in the running (operation) time.

APA, Harvard, Vancouver, ISO, and other styles

21

Li, Shutong, Yanbin Gao, Gong Meng, Gang Wang, and Lianwu Guan. "Accelerometer-Based Gyroscope Drift Compensation Approach in a Dual-Axial Stabilization Platform." Electronics 8, no. 5 (May 27, 2019): 594. http://dx.doi.org/10.3390/electronics8050594.

Full text

Abstract:

An accelerometer-based gyro drift compensation approach in a dual-axial stabilization platform is introduced in this paper. The stabilization platform consists of platform framework, drive motor, gyro and accelerometer module and contorl board. Gyro is an angular rate detecting element to achieve angular rate and rotation angle of the dynamic platform system. However, the platform system has an unstable factor because of the drift of gyro. The main contribution of this paper is to implement a convenient gyro drift compensation approach by using the accelerometer. In contrast to a kalman filtering method, this approach is simpler and practical due to the high-precision characteristic of the accelerometer. Data filtering algorithm and limit of threshold setting of total acceleration values are applied in this approach. The validity and feasibility of the proposed approach are evaluated by four tests under various conditions.

APA, Harvard, Vancouver, ISO, and other styles

22

Yuanyuan, Xue, Chen Wenjian, Kang Tingting, Chen Ying, Zhang Xiajiang, and Yang Yuancheng. "Inertial compensation method for LOS drift of gyroscope stabilization platform." Journal of Applied Optics 37, no. 2 (2016): 177–82. http://dx.doi.org/10.5768/jao201637.0201005.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Zeng Qinyong, 曾钦勇, 秦开宇 Qin Kaiyu, 邓. 键. Deng Jian, 尹彦东 Yin Yandong, and 王. 茜. Wang Qian. "Overall design of electro-optical stabilization platform based on MDO." Infrared and Laser Engineering 47, no. 9 (2018): 918003. http://dx.doi.org/10.3788/irla201847.0918003.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Nguyen, Ho Quoc Phuong, Hee-Jun Kang, Young-Soo Suh, and Ole Jacob Elle. "A platform stabilization algorithm based on feedforward visual-inertial servoing." International Journal of Precision Engineering and Manufacturing 13, no. 4 (April 2012): 517–26. http://dx.doi.org/10.1007/s12541-012-0067-6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Yu, Chunmei, Anliang Li, Shifeng Zhang, and Xibin Bai. "Robust finite time second-order sliding mode stabilization control for floated inertial platform." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 232, no. 9 (March 23, 2017): 1620–27. http://dx.doi.org/10.1177/0954410017699009.

Full text

Abstract:

High precision inertial navigation system is one of the main ways to improve the accuracy of the satellite orbit and to prolong life. In order to solve the suspension stabilization problem of the floated inertial navigation platform (or the floated platform), a robust finite time second-order sliding mode control scheme is proposed. This control method can guarantee the stability and rapidity of the system under the complex disturbances. Then, focusing on the design problem of the observer, the nonlinear extended state observer is designed to enhance the adaptability for random uncertainty and to improve the robust performance and the stabilization accuracy of the controller. Finally, the stability and convergence of the control system are proven by the homogeneous theory. The simulation results demonstrate that the proposed method can eliminate the input chattering of the sliding mode control efficiently and the high precision inertial stabilization of the floated inertial platform is realized with the accuracy higher than [Formula: see text].

APA, Harvard, Vancouver, ISO, and other styles

26

Vinoth Kumar, V., E. Balasubramanian, and S. Mano. "Stabilization of UAV using delta sigma modulator." International Journal of Engineering & Technology 7, no. 2.33 (May 31, 2018): 461. http://dx.doi.org/10.14419/ijet.v7i2.32.14810.

Full text

Abstract:

The design development and control of Unmanned Aerial Vehicles (UAV’s) have stimulated great significance in the automatic control research for the past 2 decade. In specific, Quad rotor systems are promising platform in the area of UAV research, due to its simple in construction, maintenance, ability to hover, and their vertical takeoff and landing (VTOL) capability. The dynamics and control of quad rotor are highly non-linear and under actuated so it is consider as a test-rig to verify any new proposed nonlinear control algorithm. Different control algorithms were proposed and implemented to stabilize the UAV attitude, and altitude. Adaptive control and navigation algorithms also implemented in UAV platform to ensure the maneuvering against the internal and external disturbances. The proposed research paper explains the implementation of developed digital control algorithm Delta-sigma modulator (DSM) based controller for UAV to enhance the robustness.

APA, Harvard, Vancouver, ISO, and other styles

27

Pan, Jie, Pengfei Zhang, Jincun Liu, and Junzhi Yu. "A Novel Visual Sensor Stabilization Platform for Robotic Sharks Based on Improved LADRC and Digital Image Algorithm." Sensors 20, no. 14 (July 21, 2020): 4060. http://dx.doi.org/10.3390/s20144060.

Full text

Abstract:

Autonomous underwater missions require the construction of a stable visual sensing system. However, acquiring continuous steady image sequences is a very challenging task for bionic robotic fish due to their tight internal space and the inherent periodic disturbance caused by the tail beating. To solve this problem, this paper proposes a modified stabilization strategy that combines mechanical devices and digital image techniques to enhance the visual sensor stability and resist periodic disturbance. More specifically, an improved window function-based linear active disturbance rejection control (LADRC) was utilized for mechanical stabilization. Furthermore, a rapid algorithm with inertial measurement units (IMUs) was implemented for digital stabilization. The experiments regarding mechanical stabilization, digital stabilization, and target recognition on the experimental platform for simulating fishlike oscillations demonstrated the effectiveness of the proposed methods. The success of these experiments provides valuable insight into the construction of underwater visual sensing systems and also establishes a solid foundation for the visual applications for robotic fish in dynamic aquatic environments.

APA, Harvard, Vancouver, ISO, and other styles

28

Li, Ke Xiang, and He Zhang. "Inverse Attitude Solution Model and Numerical Simulation of a 2-DOF Stabilized Platform." Advanced Materials Research 591-593 (November 2012): 679–83. http://dx.doi.org/10.4028/www.scientific.net/amr.591-593.679.

Full text

Abstract:

Considering the attitude stabilization requirements for an unmanned marine platform equipped with electro-optic detection equipment, a stabilized platform based on a 2-DOF parallel mechanism has been designed. The stabilized platform, especially for the requirements of small space and high load inertia, has such transmission branch chain with fixed ball-screw. The structure, DOF and kinematics of the platform has been analyzed, besides, the mathematical model of the platform's attitude inverse solution has been established. Numerical simulation for the derivate mathematical model and ADAMS simulation analysis has been done. In order to verify the correctness of the mathematical model, the motion process of the load-platform is described by a time function. The time function of the drive components calculated from the above two ways is used for the comparison of numerical simulation and ADAMS simulation. The results prove that the mathematical model established in this paper and ADAMS simulation results coincide.

APA, Harvard, Vancouver, ISO, and other styles

29

McNeill, Elizabeth E., Nicole L. Hines, and Regina Phariss. "A Clinical Trial of a New All-in-One Peripheral Short Catheter." Journal of the Association for Vascular Access 14, no. 1 (March 1, 2009): 46–51. http://dx.doi.org/10.2309/java.14-1-8.

Full text

Abstract:

Abstract The objectives of this survey were to: 1) understand current peripheral IV stabilization practices within our hospital and 2) evaluate the use of a new closed IV catheter system with a built-in stabilization platform. All medical-surgical patients within an 851-bed acute care hospital with peripheral-short catheters were evaluated within a 3-day period for catheter securement, dwell time, and signs of complications. Additionally, catheter restart data were collected from a renal telemetry unit for 2 weeks. Catheter and dressing protocols were then standardized to a new catheter system with a built-in stabilization platform (Nexiva™ Closed Catheter System) and an absorbent transparent dressing (SorbaView® 2000). After a 2-week trial of the new protocol, catheters were again evaluated for securement and restart data were again collected from the renal telemetry unit. Staff nurse (N = 42) opinions on the new catheter system and dressing combination were sought, as well as a vote on willingness to change to the new catheter system and dressing. Results demonstrate improvement in catheter stabilization (out to 96 hours of dwell-time), decreased restarts, a high clinical preference for the new catheter/dressing system, and a high willingness to convert to the new system. Results indicate that the new closed IV catheter system with a built-in stabilization platform and the transparent absorbent dressing evaluated in this survey may help to improve catheter securement and increase dwell-time. Research studies utilizing more rigorous randomized, controlled comparisons are warranted.

APA, Harvard, Vancouver, ISO, and other styles

30

Mańko, Pieniążek, Tim, and Jekiełek. "The Effect of Frankel’s Stabilization Exercises and Stabilometric Platform in the Balance in Elderly Patients: A Randomized Clinical Trial." Medicina 55, no. 9 (September 11, 2019): 583. http://dx.doi.org/10.3390/medicina55090583.

Full text

Abstract:

Background and Objectives: Every year, older people are becoming a larger part of the population. In a couple of years medicine is going to struggle with specific disorders and their consequences, where one of them are falls. Fall prevention involves a use of strengthening exercises, equivalent exercises, stabilometric platforms, and special exercise programs. Almost the entire brain is involved in maintaining correct balance. Reduction of a volume of gray matter negatively affects balance. Single exercise sessions do not significantly improve balance. In order to achieve satisfactory results at least 10 training sessions are required. The aim of this study is to determine if there is a correlation between a risk of falls, gender, and a risk of falls and the age of the subjects. Another reason to conduct that research was to assess the effectiveness of Frankel’s exercises and training of using the stabilometric platform in rehabilitation, which aims to reduce the risk of falls among elderly people. Materials and Methods: The study involved 40 elderly patients referred for physiotherapy to a rehabilitation center. The patients were divided into two groups of 20 people. In experimental group 1 (C) Frankel’s stabilization exercises were used; in experimental group 2 (E) a stabilometric platform was used. The correlation between the risk of falls and age as well a risk of falling and the gender of the examined persons was taken into consideration. The effect of therapy that uses stabilization exercises and the stabilometric platform on the risk of falls in the examined persons was assessed using the Tinetti scale. Clinical control was performed using the Tinetti scale, before and after a two-week rehabilitation period. Results: The study showed no correlation between the degree of risk of falling and age, and between the risk of falling by the elderly and gender. There were also changes in the results obtained by patients after using the training, both with the use of Frankel’s stabilization exercises as well as with the use of the stabilometric platform. Patients using the dynamometric platform obtained higher results in the Tinetti test after treatment. Conclusions: In the examined sample, no correlation was found between the risk of falls and age as well as the risk of falls and gender. Both Frankel's exercises and training with the use of the stabilometric platform were effective in a rehabilitation program aimed at reducing the risk of falls among the elderly.

APA, Harvard, Vancouver, ISO, and other styles

31

M’zoughi, Fares, Payam Aboutalebi, Izaskun Garrido, Aitor J. Garrido, and Manuel De La Sen. "Complementary Airflow Control of Oscillating Water Columns for Floating Offshore Wind Turbine Stabilization." Mathematics 9, no. 12 (June 12, 2021): 1364. http://dx.doi.org/10.3390/math9121364.

Full text

Abstract:

The implementation and integration of new methods and control techniques to floating offshore wind turbines (FOWTs) have the potential to significantly improve its structural response. This paper discusses the idea of integrating oscillating water columns (OWCs) into the barge platform of the FOWT to transform it into a multi-purpose platform for harnessing both wind and wave energies. Moreover, the OWCs will be operated in order to help stabilize the FOWT platform by means of an airflow control strategy used to reduce the platform pitch and tower top fore-aft displacement. This objective is achieved by a proposed complementary airflow control strategy to control the valves within the OWCs. The comparative study between a standard FOWT and the proposed OWC-based FOWT shows an improvement in the platform’s stability.

APA, Harvard, Vancouver, ISO, and other styles

32

Sachkov, G. P., S. V. Feshchenko, and A. I. Chernomorskii. "Stability and stabilization of motion of a uniaxial wheel transport platform." Mechanics of Solids 44, no. 4 (August 2009): 514–25. http://dx.doi.org/10.3103/s0025654409040037.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Li An-Liang, Cai Hong, Zhang She-Feng, and Bai Xi-Bin. "Control and modeling of suspending stabilization problom for floated inertial platform." Acta Physica Sinica 62, no. 15 (2013): 150203. http://dx.doi.org/10.7498/aps.62.150203.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Yang, Shuqiang, Hairong Zhu, and Qianqian Zhang. "Research on inertial stabilization platform on mobile carrier in complex environment." Journal of Physics: Conference Series 1345 (November 2019): 032096. http://dx.doi.org/10.1088/1742-6596/1345/3/032096.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Di Fabio, Richard P., Alongkot Emasithi, and Saurav Paul. "Validity of Visual Stabilization Conditions Used with Computerized Dynamic Platform Posturography." Acta Oto-Laryngologica 118, no. 4 (July 30, 1998): 449–54. http://dx.doi.org/10.1080/00016489850154540.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Osadchy, S. I., I. A. Bereziuk, and M. M. Мelnichenko. "MAXIMIZING THE STABILIZATION ACCURACY OF ANGULAR POSITION OF THE LANDING PLATFORM." Scientific notes of Taurida National V.I. Vernadsky University. Series: Technical Sciences 1, no. 1 (2021): 140–45. http://dx.doi.org/10.32838/2663-5941/2021.1-1/23.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Fédèle, Lionel, Frédéric Sauvage, and Matthieu Bécuwe. "Hyper-conjugated lithium carboxylate based on a perylene unit for high-rate organic lithium-ion batteries." J. Mater. Chem. A 2, no. 43 (2014): 18225–28. http://dx.doi.org/10.1039/c4ta02293a.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Garcia-Hernandez, Celia, Allison K. Freese, Maria L. Rodriguez-Mendez, and Adam K. Wanekaya. "In situ synthesis, stabilization and activity of protein-modified gold nanoparticles for biological applications." Biomaterials Science 7, no. 6 (2019): 2511–19. http://dx.doi.org/10.1039/c9bm00129h.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Arantes, Gilberto, Luiz S. Martins-Filho, and Adrielle C. Santana. "Optimal On-Off Attitude Control for the Brazilian Multimission Platform Satellite." Mathematical Problems in Engineering 2009 (2009): 1–17. http://dx.doi.org/10.1155/2009/750945.

Full text

Abstract:

This work deals with the analysis and design of a reaction thruster attitude control for the Brazilian Multimission platform satellite. The three-axis attitude control systems are activated in pulse mode. Consequently, a modulation of the torque command is compelling in order to avoid high nonlinear control action. This work considers the Pulse-Width Pulse-Frequency (PWPF) modulator which is composed of a Schmidt trigger, a first-order filter, and a feedback loop. PWPF modulator holds several advantages over classical bang-bang controllers such as close to linear operation, high accuracy, and reduced propellant consumption. The Linear Gaussian Quadratic (LQG) technique is used to synthesize the control law during stabilization mode and the modulator is used to modulate the continuous control signal to discrete one. Numerical simulations are used to analyze the performance of the attitude control. The LQG/PWPF approach achieves good stabilization-mode requirements as disturbances rejection and regulation performance.

APA, Harvard, Vancouver, ISO, and other styles

40

Deng, Jiuqiang, Wenchao Xue, Xi Zhou, and Yao Mao. "On disturbance rejection control for inertial stabilization of long-distance laser positioning with movable platform." Measurement and Control 53, no. 7-8 (July 8, 2020): 1203–17. http://dx.doi.org/10.1177/0020294020935492.

Full text

Abstract:

This paper focuses on the disturbance rejection control problem for inertial stabilization of long-distance laser positioning with the movable platform. Due to various disturbances of the movable platform, the positioning system has significant disturbances that affect the positioning accuracy. Moreover, the nonminimum-phase property of the inertial stabilization system leads to great challenges for designing traditional disturbance-observer-based as well as rejection control methods. In this paper, a dual-compensator disturbance-observer-based control algorithm is proposed to ensure a much stronger rejection of disturbances than those of conventional methods. In particular, it is proven that the two compensators in the proposed method effectively estimate disturbances in different frequency regions. Furthermore, the analytical tuning laws for the proposed dual-compensator disturbance-observer-based control method are presented. The experimental setup including the laser positioning platform demonstrated the validity of the proposed method, which effectively rejected various disturbances.

APA, Harvard, Vancouver, ISO, and other styles

41

Lv, Qiong Ying, Xi Jia Tao, Yu Shi Mei, Yu Sun, and Dan Dan Zhang. "Movement Mechanism Analysis of a Piezoelectric Spherical Two-Dimensional Stabilized Platform." Applied Mechanics and Materials 607 (July 2014): 307–11. http://dx.doi.org/10.4028/www.scientific.net/amm.607.307.

Full text

Abstract:

Based on the theory of spherical stability and piezoelectric motor drive with the combination of two dimensional stabilization platform. For two-dimensional motion spherical stabilized platform overall structure, having pitch and azimuth two ways. Using the theory of mechanics and geometry to mathematical modeling, prove multiple piezoelectric motor synergy drive, to achieve two-dimensional stabilized platform smooth movement. The design method and mathematical model analysis methods put forward by two-dimensional stabilized platform have important reference value to similar equipment research and development, important innovative progress has been made in structure, layout, and control methods.

APA, Harvard, Vancouver, ISO, and other styles

42

Vinoth kumar, V., K. Diwakar, and E. Balasubramanian. "Stabilization of UAV using Delta Sigma Modulator based controller." International Journal of Engineering & Technology 7, no. 3.34 (September 1, 2018): 198. http://dx.doi.org/10.14419/ijet.v7i3.34.18963.

Full text

Abstract:

The design development and control of Unmanned Aerial Vehicles (UAV’s) have stimulated great significance in the automatic control research for the past 2 decades. In specific, Quad rotor systems are a promising platform in the area of Uthe AV research, due to its simple in construction, maintenance, ability to hover, and their vertical takeoff and landing (VTOL) capability. The dynamics and control of quad rotor are highly nonlinear and under actuated so it is considered as a test-rig to verify any new proposed nonlinear control algorithm. Different control algorithms were proposed and implemented to stabilize the UAV attitude, and altitude. Adaptive control and navigation algorithms also implemented in UAV platform to ensure the maneuvering against the internal and external disturbances. The proposed research paper explains the implementation of the developed digital control algorithm Delta-sigma modulatoan r (DSM) based controller for UAV to enhance the robustness.

APA, Harvard, Vancouver, ISO, and other styles

43

Wu, Zhongyou, and Yaoyu Li. "Platform stabilization and load reduction of floating offshore wind turbines with tension‐leg platform using dynamic vibration absorbers." Wind Energy 23, no. 3 (January 9, 2020): 711–30. http://dx.doi.org/10.1002/we.2453.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Blanco, E., S. K. Smoukov, O. D. Velev, and K. P. Velikov. "Organic–inorganic patchy particles as a versatile platform for fluid-in-fluid dispersion stabilisation." Faraday Discussions 191 (2016): 73–88. http://dx.doi.org/10.1039/c6fd00036c.

Full text

Abstract:

We present a new class of organic–inorganic patchy particles for the efficient stabilization of Pickering foams and emulsions. Using solvent-based heterogeneous precipitation, we decorate inorganic silica particles with discrete domains of water insoluble plant protein (zein). By varying the extent of protein coverage on the silica surface, we tune the pH-dependent interactions of the particles and the interfaces. We observe an optimum foam stabilization, which is attributed to the creation of a slightly positive low effective surface potential from positively charged protein patches and the negatively charged silica surface. The effect of surface coverage on foam stability is in line with the predicted low interfacial potential of the patchy particles in water, which determines the energy of particle adsorption. In emulsions, the increase of the protein amount on the silica particles causes a progressive bridging of the oil droplets into a close-packing configuration due to gelation of the protein patches. Protein-based organic–inorganic surface heterogeneous particles represent a new versatile platform for the stabilization of fluid-in-fluid dispersions and as precursors for the assembly of advanced functional materials.

APA, Harvard, Vancouver, ISO, and other styles

45

Kolecki, J., M. Prochaska, Z. Kurczyński, P. Piątek, and J. Baranowski. "DEVELOPING THE STABILIZED MAPPING SYSTEM FOR THE GYROCOPTER – REPORT FROM THE FIRST TESTS." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B1 (June 2, 2016): 31–36. http://dx.doi.org/10.5194/isprsarchives-xli-b1-31-2016.

Full text

Abstract:

The LiDAR mapping carried out using gyrocopters provides a relatively cheap alternative for traditional mapping involving airplanes. The costs of the fuel and the overall maintenance are much lower when compared to planes. At the same time the flight kinematics of the gyrocopter makes it an ideal vehicle for corridor mapping. However a limited payload and a strongly limited space prevent using stabilized platforms dedicated for aerial photogrammetry. As the proper stabilization of the laser scanner during the flight is crucial in order to keep the desirable quality of the LiDAR data, it was decided to develop the prototype of the stabilized, ultra-light mapping platform that can meet the restricted requirements of the gyrocopter. The paper starts with the brief discussion of the legal and practical aspects of the LiDAR data quality, dealing mostly with the influence of the flight imperfections on the point pattern and point density. Afterwards the mapping system prototype is characterized, taking into account three main components: stabilized platform, sensors and control. Subsequently first in-flight tests are described. Though the data are still not perfect mostly due to vibrations, the stabilization provides a substantial improvement of their geometry, reducing both roll and pitch deflections.

APA, Harvard, Vancouver, ISO, and other styles

46

Kolecki, J., M. Prochaska, Z. Kurczyński, P. Piątek, and J. Baranowski. "DEVELOPING THE STABILIZED MAPPING SYSTEM FOR THE GYROCOPTER – REPORT FROM THE FIRST TESTS." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B1 (June 2, 2016): 31–36. http://dx.doi.org/10.5194/isprs-archives-xli-b1-31-2016.

Full text

Abstract:

The LiDAR mapping carried out using gyrocopters provides a relatively cheap alternative for traditional mapping involving airplanes. The costs of the fuel and the overall maintenance are much lower when compared to planes. At the same time the flight kinematics of the gyrocopter makes it an ideal vehicle for corridor mapping. However a limited payload and a strongly limited space prevent using stabilized platforms dedicated for aerial photogrammetry. As the proper stabilization of the laser scanner during the flight is crucial in order to keep the desirable quality of the LiDAR data, it was decided to develop the prototype of the stabilized, ultra-light mapping platform that can meet the restricted requirements of the gyrocopter. The paper starts with the brief discussion of the legal and practical aspects of the LiDAR data quality, dealing mostly with the influence of the flight imperfections on the point pattern and point density. Afterwards the mapping system prototype is characterized, taking into account three main components: stabilized platform, sensors and control. Subsequently first in-flight tests are described. Though the data are still not perfect mostly due to vibrations, the stabilization provides a substantial improvement of their geometry, reducing both roll and pitch deflections.

APA, Harvard, Vancouver, ISO, and other styles

47

Dalloz, Loïc, Alexandre Brand, Ivan Chiniah, Damien Beaumale, and Manon Commun. "Autonomous Area Mapping with Low Cost Hovercraft Platform." Applied Mechanics and Materials 799-800 (October 2015): 1102–6. http://dx.doi.org/10.4028/www.scientific.net/amm.799-800.1102.

Full text

Abstract:

In this paper, the possibility to build a low cost hovercraft platform with easily accessible materials and able to perform autonomous ground mapping is discussed. To do so, platform design is presented with proportional motors and construction module. The computing system is integrated to manage the platform displacement. Algorithms are used to counteract every constraint existing in this kind of vehicle such as low ground interaction and motors feedback, based on previous research on hovercraft stabilization. The mapping system which includes a camera and a laser is discussed in detail, and final mapping and exploration is computed with inspiration from mapping research.

APA, Harvard, Vancouver, ISO, and other styles

48

Park, Tae-Hee, Jin-Suk Kwon, Su-Young Kim, Min-huyk Chang, Chang Kim, and Ji-Hyang Lee. "Suitability Assessment of the Functional Content Platform for Stress Reduction in Firefighters." Fire Science and Engineering 35, no. 3 (June 30, 2021): 99–104. http://dx.doi.org/10.7731/kifse.f923b427.

Full text

Abstract:

Firefighters are constantly exposed to dangers in disaster sites and they need a plan to safeguard their mental health. There are various programs in place, such as mental and physical health stabilization rooms, to reduce stress and prevent mental illnesses. While these are easily accessible during work, they are lacking in function. To effectively decrease the stress of firefighters, a 65-inch TV set, a healing chair, and an aromatic device were installed in an independent booth, called a healing room. Such rooms were built in fire stations and its effects on stress were analyzed. Five quantitative indicators were identified based on the ECG measurement of firefighters and stress reduction effects were confirmed. Additionally, for the qualitative analysis, mental health interviews of firefighters confirmed stress reduction. The results of this study are expected to be used as baseline data to enhance psychological resilience in firefighters and to revitalize their mental and physical health using stabilization rooms.

APA, Harvard, Vancouver, ISO, and other styles

49

Liu Zhongyu, 刘仲宇, 张涛 Zhang Tao, 王平 Wang Ping, and 王统军 Wang Tongjun. "Topology optimization design for main frame of infrared seeker′s stabilization platform." Infrared and Laser Engineering 45, no. 2 (2016): 0218001. http://dx.doi.org/10.3788/irla201645.0218001.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Hong-guang, Li, Ji Ming, Wu Yu-jing, Guo Xin-sheng, and Peng Xia. "Stabilization technology for two-axis two-framework platform with big pitching angle." Journal of Applied Optics 36, no. 6 (2015): 823–28. http://dx.doi.org/10.5768/jao201536.0601001.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Platform stabilization'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles