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Research on cubic polynomial acceleration and deceleration control model for high speed NC machining 被引量:10
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作者 Hong-bin LENG Yi-jie WU Xiao-hong PAN 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2008年第3期358-365,共8页
To satisfy the need of high speed NC (numerical control) machining, an acceleration and deceleration (acc/dec) control model is proposed, and the speed curve is also constructed by the cubic polynomial. The proposed c... To satisfy the need of high speed NC (numerical control) machining, an acceleration and deceleration (acc/dec) control model is proposed, and the speed curve is also constructed by the cubic polynomial. The proposed control model provides continuity of acceleration, which avoids the intense vibration in high speed NC machining. Based on the discrete characteristic of the data sampling interpolation, the acc/dec control discrete mathematical model is also set up and the discrete expression of the theoretical deceleration length is obtained furthermore. Aiming at the question of hardly predetermining the deceleration point in acc/dec control before interpolation, the adaptive acc/dec control algorithm is deduced from the expressions of the theoretical deceleration length. The experimental result proves that the acc/dec control model has the characteristic of easy implementation, stable movement and low impact. The model has been applied in multi-axes high speed micro fabrication machining successfully. 展开更多
关键词 High speed NC machining acceleration and deceleration (acc/dec) control model Cubic speed curve Discrete mathematical model Adaptive acceleration and deceleration control algorithm
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Actively-controlled Beds for Ambulances 被引量:4
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作者 Takahiko Ono Hikaru Inooka 《International Journal of Automation and computing》 EI 2009年第1期1-6,共6页
During transportation by ambulance, a patient is exposed to inertial acceleration when an ambulance decelerates or turns a corner. Such acceleration often gives a patient physical stress such as blood pressure variati... During transportation by ambulance, a patient is exposed to inertial acceleration when an ambulance decelerates or turns a corner. Such acceleration often gives a patient physical stress such as blood pressure variation or body sway, which causes strong pain, feeling of discomfort or sometimes critical damage for seriously injured persons. To reduce this undesirable effect of the acceleration, the authors developed the actively-controlled bed (ACB) which controls the posture of a stretcher in real time to reduce foot-to-head and lateral acceleration acting on a supine person. This paper describes development of the ACB, including control system design and performance evaluation. The control system is designed by Zakian's framework, which comprises the principle of matching and the method of inequalities, so that the design specifications on the tracking error and the motor torque are satisfied. From the results of driving experiments and simulation, it is estimated that the ACB can reduce the acceleration acting on a patient by 65% in the foot-to-head direction and by 75% in the lateral direction. 展开更多
关键词 control systems mechanical systems motor control acceleration control position control.
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INDIRECT ACCELERATED ADAPTIVE FUZZY CONTROLLER 被引量:2
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作者 ZHU Liye FANG Yuan ZHANG Weidong 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2008年第1期91-93,共3页
According to a type of normal nonlinear system, an indirect adaptive fuzzy (IAF) controller has been applied to those systems where no accurate mathematical models of the systems under control are available. To sati... According to a type of normal nonlinear system, an indirect adaptive fuzzy (IAF) controller has been applied to those systems where no accurate mathematical models of the systems under control are available. To satisfy with system performance, an indirect accelerated adaptive fuzzy (IAAF) controller is proposed, and its general form is presented. The general form IAAF controller ensures necessary control criteria and system's global stability using Lyapunov Theorem. It has been proved that the close-loop system error converges to a small neighborhood of equilibrium point. The optimal IAAF controller is derived to guarantee the process's shortest settling time. Simulation results indicate the IAAF controller make the system more stable, accurate, and fast. 展开更多
关键词 Indirect adaptive fuzzy controller Accelerated controller Stability System error Settling time
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STUDY ON SENSOR-BASED CONTROL METHOD FOR HARMONIC DRIVE SYSTEM 被引量:12
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作者 Tan Dalong, Qiu Zhicheng, Han Jianda (Shenyang Institute of Automation, Chinese Academy of Sciences) 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2000年第3期234-240,共7页
A new type of robust traje ctory tracking control for harmonic using joint torque sensor and joint acceleration sensor information is concerned with.Joint torque sensor information is used to compensate the uncertaint... A new type of robust traje ctory tracking control for harmonic using joint torque sensor and joint acceleration sensor information is concerned with.Joint torque sensor information is used to compensate the uncertainty of link and load parameters. Joint acceleration feedback control will enhace the robustness of the driving system, resist the dynamic uncertainties and disturbing torque acted on the joint axis within definite bandwidth, improve the joint tracking performance, and resist the vibration of the load side of the harmonic drive system. Experimental studies are carried out and comparison of several controllers , such as PD and sensor- based control, the experimental results clearly illustrate the effectiveness of the proposed methods. 展开更多
关键词 Harmonic drive acceleration Feedback control Vibration Disturbance Trajectory trackp
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A study on optimal control of the aero-propulsion system acceleration process under the supersonic state 被引量:7
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作者 Sun Fengyong Du Yao Zhang Haibo 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2017年第2期698-705,共8页
In order to solve the aero-propulsion system acceleration optimal problem,the necessity of inlet control is discussed,and a fully new aero-propulsion system acceleration process control design including the inlet,engi... In order to solve the aero-propulsion system acceleration optimal problem,the necessity of inlet control is discussed,and a fully new aero-propulsion system acceleration process control design including the inlet,engine,and nozzle is proposed in this paper.In the proposed propulsion system control scheme,the inlet,engine,and nozzle are simultaneously adjusted through the FSQP method.In order to implement the control scheme design,an aero-propulsion system componentlevel model is built to simulate the inlet working performance and the matching problems between the inlet and engine.Meanwhile,a stabilizing inlet control scheme is designed to solve the inlet control problems.In optimal control of the aero-propulsion system acceleration process,the inlet is an emphasized control unit in the optimal acceleration control system.Two inlet control patterns are discussed in the simulation.The simulation results prove that by taking the inlet ramp angle as an active control variable instead of being modulated passively,acceleration performance could be obviously enhanced.Acceleration objectives could be obtained with a faster acceleration time by5%. 展开更多
关键词 acceleration control Inlet control design Inlet and engine cooperative working Optimal control
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An extrapolation approach for aeroengine's transient control law design 被引量:8
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作者 Kong Xiangxing Wang Xi +2 位作者 Tan Daoliang He Ai Liu Yue 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2013年第5期1106-1113,共8页
Transient control law ensures that the aeroengine transits to the command operating state rapidly and reliably. Most of the existing approaches for transient control law design have complicated principle and arithmeti... Transient control law ensures that the aeroengine transits to the command operating state rapidly and reliably. Most of the existing approaches for transient control law design have complicated principle and arithmetic. As a result, those approaches are not convenient for application. This paper proposes an extrapolation approach based on the set-point parameters to construct the transient control law, which has a good practicability. In this approach, the transient main fuel control law for acceleration and deceleration process is designed based on the main fuel flow on steady operating state. In order to analyze the designing feature of the extrapolation approach, the simulation results of several different transient control laws designed by the same approach are compared together. The analysis indicates that the aeroengine has a good performance in the transient process and the designing feature of the extrapolation approach conforms to the elements of the turbofan aeroengine. 展开更多
关键词 acceleration control law acceleration and deceleration characteristic Aeroengine control Deceleration control law Extrapolation approach Transient control law Turbofan engine
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Accelerator Control System and Its Progress 被引量:8
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作者 赵籍九 《Chinese Physics C》 SCIE CAS CSCD 北大核心 2008年第z1期139-141,共3页
Currently accelerator control systems adopt distribution architecture and are developed with integration tools,such as EPICS,TANGO and SCADA.The digital controller based on FPGA,DSP is widely used in accelerator contr... Currently accelerator control systems adopt distribution architecture and are developed with integration tools,such as EPICS,TANGO and SCADA.The digital controller based on FPGA,DSP is widely used in accelerator controls and embedded EPICS IOC is a hot point.On the software side,laboratories have built their software develop- ment environments and the open sources Eclips,Abeans serve software development too.The high availability research is a challenge in the control world.The paper describes accelerator controls and progress of correlative technologies. 展开更多
关键词 accelerator control system integration hardware and software high availability
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The accelerator control system of CSNS 被引量:3
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作者 Yuliang Zhang Dapeng Jin +19 位作者 Peng Zhu Yongcheng He Xuan Wu Mingtao Kang Fengqin Guo Lin Wang Gang Li Wenchun Gao Chunhong Wang Ge Lei Jincan Wang Jia Liu Guanglei Xu Zhuo Zhao Mingchuan Zhan Youheng Wang Xiangcheng Kong Yimin Han Xiaoli Wang Qi le 《Radiation Detection Technology and Methods》 CSCD 2020年第4期478-491,共14页
The China Spallation Neutron Source is an accelerator-based user facility for neutron,proton,muon applications and so on.The designed proton beam power is 100 kW for the first phase.Overall,the scope of accelerator co... The China Spallation Neutron Source is an accelerator-based user facility for neutron,proton,muon applications and so on.The designed proton beam power is 100 kW for the first phase.Overall,the scope of accelerator control system covers four parts,the global systems,the device layer local controls and remote controls,the high-level applications and services and the integration of conventional facilities.The principle guideline is to adopt as many as possible matured technologies and commercial products in the design and implementation.The control system is based on Experimental Physics and Industrial Control System.VME64x bus is chosen for timing system and fast protection system.PLCs and embedded industrial computers are used in the device layer slow controls.Control System Studio is adopted as the high-level applications.Blade server-based virtualization platform is deployed for the computer system.The accelerator control system was completed in September 2017 and then transited to routine operations.The design,implementation and operation of the accelerator control system are described in this paper. 展开更多
关键词 CSNS Accelerator control EPICS Machine protection system Run management system
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Robust gain-scheduled missile autopilot design based on multifrequency extended state observers
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作者 Zonghua SUN Liaoni WU Yancheng YOU 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2023年第12期390-407,共18页
This paper describes the design and implementation of a three-axis acceleration control autopilot for an asymmetric tail-controlled,skid-to-turn tactical missile.In an earlier flight test,degraded autopilot performanc... This paper describes the design and implementation of a three-axis acceleration control autopilot for an asymmetric tail-controlled,skid-to-turn tactical missile.In an earlier flight test,degraded autopilot performance was attributed to multiple disturbances and uncertainties and the presence of hidden coupling terms,giving rise to a miss distance of greater than 20 m.To address these issues,the missile dynamics are decomposed into the angular rate dynamics as fast and the acceleration dynamics as slow subsystem using the singular perturbation theory to analyze a multi-time-scale property.Multifrequency extended state observers are then incorporated into the gain scheduling technique to attenuate disturbances,thus enhancing the control performance significantly.In the proposed engineering/practical design framework for missile autopilot,simple,conventional,and explicit tuning rules are provided.And the proposed control scheme can achieve input-to-state stability across the entire flight envelope under unknown but bounded disturbances.The advantages of the method over existing benchmark approaches are shown through nonlinear numerical simulations.This is supported by evidence from a new flight test result with a miss distance of only 2 m. 展开更多
关键词 acceleration control control engineering Disturbance rejection Multifrequency extended state observer Flight control systems Gain scheduling Singular perturbation
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Research on the application of digital power supply based on domestic FPGA
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作者 Xiao Li Chao Han Feng Li Long 《Radiation Detection Technology and Methods》 CSCD 2023年第3期399-409,共11页
Purpose The digital controller for the accelerator magnet power supply typically employs a field-programmable gate array(FPGA)as the signal processing chip for executing digital processing of closed-loop control.Curre... Purpose The digital controller for the accelerator magnet power supply typically employs a field-programmable gate array(FPGA)as the signal processing chip for executing digital processing of closed-loop control.Currently,FPGA chips are predominantly utilized in Intel or Xilinx products.To address the“key areas and stranglehold”issue pertaining to FPGA chips in accelerator power supply,we have devised a digital power supply prototype using a domestic FPGA chip and validated its feasibility in the upgrade project’s magnet power supply digital transformation plan for the Beijing Electron Positron Collider(BEPCII).Method A domestic FPGA chip from the Seal5000 SA5Z-30-D1 series by Xi’an ZhiDuoJing Microelectronics Co.serves as the core component for the design of a digital corrector magnet power supply to replace the existing analog controlled corrector power supply at BEPCII.The power supply’s digital control of the closed loop is achieved through the use of a hardware description language,and the digital controller hardware is constructed based on the original power supply power topology.Results and conclusions After conducting experiments and tests on the power supply prototype,we have successfully met the current operational requirements of the BEPCII corrector power supply,thus confirming the feasibility of utilizing domestic FPGA for digital application on accelerator power supply. 展开更多
关键词 Domestic FPGA Power supply digital controller of accelerator PID algorithm PWM
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A device information-centered accelerator control network management system
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作者 Tian Qin Chuan Li +1 位作者 ShengAo Sun GongFa Liu 《Radiation Detection Technology and Methods》 2024年第3期1342-1358,共17页
Purpose The control network is a critical infrastructure that supports the stable operation of the accelerator.Each device accessing the control network has different device information,such as IP address,MAC address,... Purpose The control network is a critical infrastructure that supports the stable operation of the accelerator.Each device accessing the control network has different device information,such as IP address,MAC address,connected switches and ports,device location and purpose.Accurately maintaining the mapping relationship between these device information facilitates network management.It helps inventory assets,fault location and provide visibility into dynamic changes of device on the network.However,existing tools cannot fully satisfy these demands.They only map some information and lack details important for accelerator facilities like device location and purpose.Additionally,they only reflect the current status rather than indicating dynamic changes across all devices over time.As intelligent devices proliferate,the scale of the control network is rapidly expanding,posing greater challenges in maintaining mapping relationships.Methods This paper proposes a device information-centered Accelerator Control Network Management System(ACNMS).It establishes a device information management framework and allows network administrators to perceive the dynamic changes of devices on the network.The system adopts a layered architecture.Back-end modules implement the core logic of all functions.The graphical user interface presents data and provides a management portal.Results The system test on the control network of the National Synchrotron Radiation Laboratory demonstrates that it can meet the functional design objectives.The application scenarios of the ACNMS are further expanded through system integration and combination with network automation.Conclusion The ACNMS has proven to be an efficient network management tool that significantly improves the operation and maintenance efficiency of the accelerator control network. 展开更多
关键词 Accelerator control network Device information-centered-Network management System integration Networkautomation
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