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Nonlinear Iterative Optimization Process for Multichannel Remote Parameter Control

SAE International Journal of Vehicle Dynamics, Stability, and NVH

Meng Li, Yong Zhang
  • Journal Article
  • 10-03-03-0015
Published 2019-10-14 by SAE International in United States
In this article, compared with traditional Remote Parameter Control (RPC), the iterative process is improved based on linear transfer function (TF) estimation of the nonlinear dynamic system. In the improved RPC, the iteration coefficient is designed according to the convergence condition of the nonlinear iterative process, so that the convergence level, convergence speed, and iteration stability could be improved. The difference between the traditional and the improved RPC iterative process is discussed, the RPC iterative process of the nonlinear system is analyzed, and channel decoupling for Multi-Input Multi-Output (MIMO) system based on eigen-decomposition of the system TF and linear TF estimation is introduced. It assumes that the eigenvector matrix of the system TF remains the same, and the linear TF in the iterative process is estimated and updated, which is used for iterative calculation. The method for iteration coefficient is designed according to the nonlinear system convergence condition of the iterative process. The whole theory is verified on a two-channel electrohydraulic servo system and a lightweight motorcycle. The optimization strategy can be used not only…
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SAE Truck & Off-Highway Engineering: October 2019

  • Magazine Issue
  • 19TOFHP10
Published 2019-10-03 by SAE International in United States
On the verge of the Digital Age Increasingly connected electrohydraulic systems and machine controls allow the high degree of controllability that's essential for automated operations.Miserly power systems Engineers push engine, transmission technologies to turn off fuel usage.All options on the table Powertrain developers who spoke at SAE COMVEC are leaving no stone unturned in their quest to trim emissions.Cab air quality: A critical component of operator comfort Focus on defining cab air quality, measuring it, and designing the needed performance into cabin designs and HVAC systems is intensifying.Expanding fast charging faster Tritium works to accelerate installation of DC fast-charging infrastructure to keep up with growing demand for commercial EVs.Editorial Word on the street at COMVECLink digital suspension uses sensors, ECU to keep cabs stableKnapheide saves costs, time by moving vehicle life testing in-houseFord revisits OHV layout, big displacement for new commercial-truck V8Design tools ensure component compatibility, create autonomous driving testsHow HMI displays impact operator productivity in industrial vehiclesTruck OEMs intensify focus on customer experience, telematics to keep fleets up and runningQ&A CNH Industrial's Hubertus M.…
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Energy-Management Strategy for Four-Wheel Drive Electrohydraulic Hybrid System with Optimal Comprehensive Efficiency

SAE International Journal of Passenger Cars - Electronic and Electrical Systems

Chongqing University, China-Yang Yang, Ke Lu, Chunyun Fu
  • Journal Article
  • 07-12-01-0004
Published 2019-08-22 by SAE International in United States
The four-wheel drive electric sport utility vehicle (SUV) requires high dynamic performance, and the front and rear axles are matched with a high-power motor. High-power motors operate under low-speed and low-torque conditions, with low efficiency and large power loss. To reduce the power loss under low-speed and low-load conditions, a hybrid system of front and rear dual motors and dual hydraulic pumps/motors is designed. A simulation model of a four-wheel drive SUV electrohydraulic hybrid system is constructed. Aiming at the optimal energy consumption, a dynamic programming algorithm is adopted to establish the driving control rules of the vehicle. Constrained by the Economic Commission for Europe Regulation No.13 (ECE R13), a braking-force distribution strategy for the front and rear axles is formulated. On the premise of satisfying the braking safety, regenerative braking is preferred, and the braking energy is recovered to the greatest extent possible. The optimal efficiency curve of the motor is identified, and an energy-management strategy based on the optimal efficiency curve of the motor is established. The comprehensive efficiency of the dual motor…
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The Fault-Augmented Approach for the Systematic Simulation of Fault Behavior in Multi-Domain Systems in Aerospace

ESI ITI GmbH-Artem Kolesnikov, Maxim Andreev, Andreas Abel
Published 2018-10-30 by SAE International in United States
A library for modelling faults in multi-domain physical systems is introduced. The library is based on the simulation of fault effects on the system’s behavior. The motivation of how and why to model faults systematically as well as a description of the Modelica®-based library structure with a wizard supporting the semi-automatic augmentation process of faults are outlined. The fault types are classified into continuous and discrete with dedicated type definitions. The application of the Fault library is exemplified in the field of aerospace electrohydraulic actuator. The actuator is equipped with hydromechanical, electrical and digital systems for mitigating failures, which should be tested at an early stage of design. To perform the tests, a multi-domain, dynamic system model is created, wherein failures are systematically simulated using a special approach for fault augmentation. In addition, several complementary tests are obtained by a variants simulation and the simulation results of the fault augmented model are analyzed and using supervised machine learning classifier are demonstrated. Different classification algorithms were compared to each other and analyzed. The accuracy of an…
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SAE Truck & Off-Highway Engineering: October 2017

  • Magazine Issue
  • 17TOFHP10
Published 2017-10-01 by SAE International in United States
Advances for off-highway engine design As manufacturers continue to drive out cost and meet a worldwide patchwork of regulatory frameworks, the tools for developing those engines are advancing. From showcase prototypes to advanced analytical techniques, suppliers are helping the cause.Military vehicles battle for autonomy at lower cost Engineers are adding sensors, more powerful micros and faster networks as they automate tasks and pave the way to autonomy.Heavy duty lightweighting Optimization of tractor-trailer systems and component design helps to reduce overall vehicle mass, a key strategy in improving fuel economy and meeting upcoming Phase 2 GHG regulations.Navistar's SuperTruck II explores composites, WiFi to cut weightMethane state of mind New Holland ramps up its focus on alternative fuels, showcasing a methane-powered concept tractor that trims emissions, operating costs.Editorial Deep learning how to driveZircotec manages heat transfer in hotter exhaust systemsNikola CEO: Fuel-cell Class 8 truck on track for 2021Paccar launches lightest HD automated transmission for on-highway CVsEaton solves nuisance problems with electrohydraulic solutionsCummins reveals all-electric truck ahead of TeslaVolvo CE sees major efficiency gain from hybrid-electric wheel…
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Eaton solves nuisance problems with electrohydraulic solutions

SAE Truck & Off-Highway Engineering: October 2017

  • Magazine Article
  • 17TOFHP10_10
Published 2017-10-01 by SAE International in United States

Hysteresis is a common shortcoming in applying fluid power products to industrial and mobile equipment. It is frequently unreported due to a lack of a cost-effective option to address this issue. As the hydraulics industry works to enhance precision and repeatability in machines, a better understanding of hysteresis-or the variance of output flow from the input command-and how it affects fluid power may help.

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Agile and Low-Cost Experimental Evaluation of Fuel Consumption Reduction of a New Electrified Clutch Transmission Virtually Connected to a Vehicle

University of Sherbrooke-Robin Temporelli, Philippe Micheau, Maxime Boisvert
Published 2017-03-28 by SAE International in United States
Automated Manual Transmission (AMT) based on classic electrohydraulic clutch actuation gives high performances and comfort to a recreational vehicle. However, overall power consumption remains high due to the pump efficiency. In addition, the pump is often driven by the vehicle’s engine and thus is continuously working. To address this issue, a new electrified clutch based on electromechanical actuation has been designed and prototyped. In order to evaluate the effective fuel consumption reduction using this new clutch actuator, a low-cost and agile method is presented and used in this paper. Indeed, instead of integrating the clutch actuator in a real vehicle and performing expensive real emission test cycles on a road, this original method proposes to perform accurate semi-virtual emission test cycles. Moreover, the method allows to perform numerous test iterations in a short time. This consists in connecting the prototyped new electric clutch to a virtual vehicle in order to test it as it would be used in a real vehicle. A dedicated real-time rapid prototyping system (Opal-RT) runs the simplified vehicle dynamics and controls…
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Actuation System Data Summary for Missiles and Launch Vehicles

A-6B1 Hydraulic Servo Actuation Committee
  • Aerospace Standard
  • AIR1855A
  • Current
Published 2016-09-28 by SAE International in United States
This SAE Aerospace Information Report (AIR) includes all missile and launch vehicle actuation systems, including electrohydraulic, electropneumatic, and electromechanical types. The data for many systems are not complete. As more information becomes available, periodic updates will be issued to complete existing data sheets and to add new ones. An index by type of vehicle and by type of actuation system is included. The actual data sheets in the body of the report are organized in alphabetical order.
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Automated System to Control Steering and Wheel Springing Parameters in Vehicle Locomotion Module

Moscow Bauman State Tech Univ-Boris Belousov, Tatiana I. Ksenevich, Sergei Naumov
Published 2015-01-14 by SAE International in United States
The modular designing principle is generally recognized in the automotive industry. However, the issue of building a wheel open-link locomotion module (OLLM) as a combination of steering (wheel turning), springing, traction drive and braking systems is not properly developed yet. An automated control system (ACS) is needed to able to unite and coordinate all the vehicle systems intended to manage the wheel.The automated control system intended to manage the steering and wheel springing parameters is a combination of an information and power channels, through which the wheel is electro-hydraulically driven, and the steering, springing and braking systems are controlled. The number of such channels in a wheeled mover of the vehicle or mobile robot is defined by the wheel type (driving, driven, steered or non-steered wheel). The plurality of such channels forms a complex of automated control systems of the wheeled mover. This complex is responsible for: 1) Controlling the steering wheel of the vehicle (through the systems aimed to steer the wheel at curvilinear motion); 2) Regulating the rigidity and damping parameters of axle…
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SAE Off-Highway Engineering: November 6, 2014

  • Magazine Issue
  • 14OFHP11
Published 2014-11-06 by SAE International in United States
Calibration and complexity Off-highway engine applications continue to increase in complexity to meet emissions regulations and fuel economy targets as well as to take advantage of advances in electrification and mechatronics. The model-based calibration process has become the industry standard.ECU advances take many paths Controllers are evolving rapidly, with a range of microcontrollers distributed throughout the vehicleWorking remotely A new electrohydraulic steering technology that offers energy efficiency improvement, increased productivity, enhanced safety, and adaptability to operating conditions also has the capacity to support remote operation of a compact wheel loader.