Hydraulic actuator

This study presents a force control approach for an EHA system using a combination of a feedforward-based PID (FPID) controller and a grey predictor (GP), shortened as grey predictor-based feedforward PID Controller (GPFPID). The FPID controller is used to drive the system to desired targets. Meanwhile, the GP predictor takes part in estimating the output in the near future to optimize the controller parameters in advance and to create a compensating control signal corresponding to the system perturbations, consequently, improving the control performance.

4p giangnhanly 02-10-2023 7 3   Download

Lecture Drilling engineering: Well control equipment. By the end of this lecture you should be able to drilling spools: used as an element between rams to provide mud exist lines such as choke and kill lines; drilling spool can be flanged, studded or clamp-on type; hydraulically actuated drilling choke;...

55p hanthienngao 15-04-2022 11 2   Download

In this paper, a control algorithm for controlling the position of the EHA is designed. In this controller structure, the system uncertainties are lumped into two unknown time-varying functions. The boundary of one of the unknown functions is not available. An approximate technique is used to express the unknown function as a finite combination of basis function.

11p tunelove 12-06-2021 8 1   Download

The advanced passive pressurized water reactor (PWR) is being constructed in China and the passive residual heat removal (PRHR) system was designed to remove the decay heat. During accident scenarios with increase of heat removal from the primary coolant system, the actuation of the PRHR will enhance the cooldown of the primary coolant system. There is a risk of power excursion during the cooldown of the primary coolant system. Therefore, it is necessary to analyze the thermal hydraulic behavior of the reactor coolant system (RCS) at this condition.

9p minhxaminhyeu5 30-06-2019 16 1   Download

This paper presents a study in vibration field of a large-scale hydraulic cylinder actuator via numerical simulation. A model of hydrostatic hoisting machine which is built with dynamical parameters is executed for implementation and performance evaluation.

5p visasuke2711 25-04-2019 19 0   Download

In this paper, the tree structure genetic programming algorithm has been used to find the nonlinear model for the electro-hydraulic actuator. For this kind of electro-hydraulic actuator, some behaviors of the system are known but still the relation of these sub-functions–whole system- is not known due to high nonlinearities and compact model.

6p praishy2 27-02-2019 23 0   Download

This paper presents a control of active suspension system for quarter-car model with two-degree-of-freedom using H and nonlinear adaptive robust control method. Suspension dynamics is linear and treated by H method which guarantees the robustness of closed loop system under the presence of uncertainties and minimizes the effect of road disturbance to system.

9p sansan2 26-05-2018 51 3   Download

I intentionally left out the whole world of hydraulics. While hydraulic power can be the answer when very compact actuators or high power density motors are required, it is potentially more danger- ous, and definitely messier, to work with than electrically powered devices. It is also much less efficient—a real problem for battery pow- ered robots. There are many texts on hydraulic power and its uses. If hydraulics is being considered in a design, the reader is referred to Industrial Fluid Power (4 volumes) 3rd ed., published by Womack Education Publications.

0p loixinloi 08-05-2013 40 2   Download

From a basic hardware point of view it is important to understand the steady-state equations of a hydraulic and electric actuator. The majority of hydraulic positioning or machine feed drives use a rotary actuator with a servo valve attached to the motor to minimize the amount of trapped oil under compression. By minimizing the volume of oil that is trapped between the servo motor and servo valve, the hydraulic resonance will be increased and the drive made more stable.

0p thanhspktcdt10 23-03-2013 48 5   Download

Flight controls have advanced considerably throughout the years. In the earliest biplanes flown by the pioneers flight control was achieved by warping wings and control surfaces by means of wires attached to the flying controls in the cockpit. Figure 1.1 clearly shows the multiplicity of rigging and control wires on an early monoplane. Such a means of exercising control was clearly rudimentary and usually barely adequate for the task in hand.

536p nhulan0908 01-10-2012 149 13   Download

Hệ thống nhiên liệu HEUI (Hydraulically Actuated Electronically Controlled Unit Injector – Tác động thủy lực, điều khiển điện tử ) là một trong những cải tiến lớn của động cơ Diesel. 1. Khái quát về hệ thống nhiên liệu Diesel HEUI: Hệ thống nhiên liệu HEUI (Hydraulically Actuated Electronically Controlled Unit Injector – Tác động thủy lực, điều khiển điện tử ) là một trong những cải tiến lớn của động cơ Diesel. Nó cũng là một bộ phận trong công nghệ ACERT của hãng Carterpillar. Sự ra của đời của HEUI đã thiết lập những tiêu chuẩn mới đối...

7p gaunau123 24-11-2011 464 118   Download

-Cơ cấu tác động là cơ cấu biến đổi năng lượng dùng để biến áp suất dầu thành công cơ học. -Công suất tiêu hao của hệ thống thuỷ lực phụ thuộc vào:lưu lượng cung cấp ,áp suất tiêu hao và hiệu suất của hệ thống. Có 3 loại cơ cấu tác động cơ bản: a.Xy lanh thuỷ lực-thực hiện chuyển động thẳng đi về. b. mô tơ thuỷ lực –thực hiện chuyển động quay tròn liên tục. c.Xy lanh quay-thực hiện chuyển động quay qua quay lại trong 1 góc giới hạn. 2 4.1.XY LANH THUỶ LỰC(HYDRAULIC CYLINDERS). Xy lanh thuỷ...

33p khattien0001 05-10-2011 139 37   Download

Hệ thống nhiên liệu HEUI (Hydraulically Actuated Electronically Controlled Unit Injector) là một trong những cải tiến lớn của động cơ điezen. Nó cũng là một bộ phận trong công nghệ ACERT của hãng Carterpillar. Sự ra đời của HEUI đã thiết lập những tiêu chuẩn mới đối với động cơ về tiêu hao nhiên liệu, độ bền cũng như các tiêu chuẩn về khí thải.

14p nanggio2010 13-11-2010 510 148   Download

21 Actuators and Computer-Aided Design of Robots Miomir Vukobratovi´ c Mihajlo Pupin Institute 21.1 Robot Driving Systems Present State and Prospects • DC Motors: Principles and Mathematics • How to Mount Motors to Robot Arms • Hydraulic Actuators: Principles and Mathematics • Pneumatic Actuators: Principles and Mathematics Veljko Potkonjak University of Belgrade Kenji Inoue Osaka University 21.

34p medinova 28-10-2010 149 18   Download

CHAPTER 1 MOTION CONTROL SYSTEMS MOTION CONTROL SYSTEMS OVERVIEW Motion control systems today can be found in such diverse applications as materials handling equipment, machine tool centers, chemical and pharmaceutical process lines, inspection stations, robots, and injection molding machines.

32p medinova 26-10-2010 78 12   Download

It replaces the viscous clutch in four-wheel drive. As soon as a difference in speed comes about between front and rear axle, the swash plate begins to turn. In this, it operates the pump plunger, which presses hydraulic oil into the plunger of the friction disks. After less than one revolution, adhesion has resulted. The base is actuated by closing the switch. The With the help of the electronically operated throttle collector emitter line becomes conductive, the lamp valve, the slip can be adapted to the driving lights up. This can be...

8p hiruscar 13-10-2010 80 4   Download

CHAPTER 43 FLUID POWER SYSTEMS AND CIRCUIT DESIGN Russ Henke, RE. Russ Henke Associates Elm Grove, Wisconsin 43.1 PRESSURE PLOTS / 43.2 43.2 FLOW PLOTS / 43.2 43.3 POWER PLOTS / 43.3 43.4 CYCLE PROFILE / 43.4 43.5 CIRCUIT DESIGN / 43.4 43.6 OPEN-LOOP AND CLOSED-LOOP CIRCUITS / 43.5 43.7 CONSTANT-FLOW VERSUS DEMAND-FLOW CIRCUITS—OPEN LOOP / 43.12 43.8 DEMAND-FLOW CIRCUITS / 43.20 43.9 HYDRAULIC VERSUS PNEUMATIC SYSTEMS / 43.28 43.10 PNEUMATIC CIRCUITS / 43.28 43.11 EFFECT OF FLUID CHARACTERISTICS ON ACTUATOR PERFORMANCE / 43.28 43.

48p hadalabo 29-09-2010 69 10   Download

CHAPTER 2 8 BASIC CONTROL SYSTEMS DESIGN William J. Palm III Mechanical Engineering Department University of Rhode Island Kingston, Rhode Island 28.1 INTRODUCTION 28.2 868 28.7.3 28.7.4 28.7.5 28.8 CONTROL SYSTEM STRUCTURE 869 28.2.1 A Standard Diagram 870 28.2.2 Transfer Functions 870 28.2.3 System-Type Number and Error Coefficients 871 TRANSDUCERS AND ERROR DETECTORS 872 28.3.1 Displacement and Velocity Transducers 872 28.3.2 Temperature Transducers 874 28.3.3 Flow Transducers 874 28.3.4 Error Detectors 874 28.3.5 Dynamic Response of Sensors 875 ACTUATORS 28.4.

27p hadalabo 29-09-2010 75 12   Download