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Development of damping control system for air suspension
Abstracts performance with large initial variation. And it is also shown that both control have good control performance against modeling robustness. The results above are verified by both real vehicle experiments and simulations.
9535639 Development of the Lane-Keeping System Tadayuki Niibe, Kazunori Isomoto, Takamasa Suetomi, Tetsuro Butsuen (Mazda Motor Corporation) We have been developing collision avoidance systems which are designed to prevent traffic accidents stemming from human errors by generating alarms and/or automatically controlling vehicles. In this paper, we introduce “Lane-keeping” system that hinders human drivers from swerving out of his lane without his intention. This system comprises three elements, lane-marker recognition, excursion-prediction logic and automatic-steering actuator. The system is evaluated through “Real-time simulator” for vehicle control study. “Driving simulator” for human interface study, and field tests.
9535648 On the Hazard-Controllability of Distance-Warning SysYoshinobu Sato (Tokyo Univ. of Mercantile tems for Automobiles Marine), Eiichi Kato, Koichi Machida (Hino Motors, Ltd.) In the present paper, the hazard-controllability of distance-warningsystems for automobiles is estimated based on deductive methodology. First, hazards are identified and the targeted systems are defined. Next, accidents causation models are developed in terms of fault-trees with the hazards being top-events. The fault-trees are analyzed qualitatively and quantitatively. Then, the effectiveness of the distance-warning systems is estimated by comparing the statistics of the hazards for both vehicles equipped and not equipped with the distance-warning systems.
9535657 Study of a Novel Control Method of Steering System for a Radio-Controlled Truck Masanori Kobayashi, Taketoshi Kawabe, Sadahiro Takahashi, Yosito Watanabe (Nissan Diesel Motor Co., Ltd.) We investigated a robust control method applied to a DC-motor, the actuator of a steering system installed on a radio-controlled multi-loader truck. Requirements for the control system are robustness and stability against disturbances and change in plant characteristics, and rapid and accurate response to steering commands. To comply with these requirements, we applied a robust model matching (RMM) control method to the steering actuator. Results of simulation analyses and a hardware in the loop simulation show the effectiveness of this control method.
9535666 sion
Development of Damping Control System for Air SuspenKunihito Satoh, Takaaki Enomoto (Toyota Motor
Kazuo Ogawa,
Corporation) We have developed the continuous damping control system based on skyhook damper theory for air suspension. To put this system into practical use, the optimal parameters of the system are analyzed by using computer simulation. And the control strategy is designed to suit to the air suspension of which spring has nonlinear property. Since the control strategy and the system parameters are determined according to the simulation results, we were able to obtain an excellent combination of flat vehicle attitude, soft ride comfort and stable driving performance.
9535675 Active Suspension of Heavy Tracked Vehicle - Part 1: Bench Test Kiichi Kanagawa, Seikichi Nowada, Yukio Inoue, Takehiko Okazawa, Masatoshi Hashimoto (Technical Research and Development Institute, Japan Defense Agency) This paper describes the results of experiments for the Bench Test of Active Suspension System. This system controls oil pressure of suspension cylinders, wheel displacement, hull pitch rate etc.. The results shows that the active suspension reduces pitch angle about 60 percent and the active suspension with variable dampers is effective at all vehicle speed ranges.
323
9535684 Development of the Active Damper Suspension Toshiro Hirai, Takahisa Tatarazako (Nissan Motor Co., Ltd.), Katuyuki Takagi, Mituo Sasaki (Unisiajecs Corporation) We have developed and put into practical use the Active Damper Suspension in which Skyhook Control - a highly regarded feature of the existing hydraulic active suspension - is achieved by controlling the damping force of the dampers. In developing this new suspension, the functions of the automotive suspension were thoroughly reexamined. As a result, the new suspension provides an unprecedented combination of smooth ride comfort and firm, well-damped driving performance by optimally adjusting the damping force in real time to match the vehicle behavior and road surface inputs. This paper describes the development aims set for this suspension system along with its configuration, operating mechanism and benefits. 9535693 Vehicle Stability Control in Limit Cornering by Active Masaki Yamamoto, Ken Koibuchi, Yoshiki Fukada, Shoji InaBrake gaki (Toyota Motor Corporation) Improvement of vehicle dynamics in limit cornering have been studied. Simulations and tests have verified that vehicle stability and course trace performance in limit cornering have been improved by the active brake control for each wheel, because which control has been able to manage the vehicle yawing moment utilizing difference braking force between left and right wheels and the vehicle deceleration utilizing sum braking force of all wheels. On the Performance of Vehicle Equipped with ABS Sys9535701 tem Using the Load Surface Frictional Coefficient, p(M-ABS). - In the New System Using the Frictional Force and the Superiority of Braking Performances for Low Speed and Low p. - Nagao Miyazaki, Ryuzo Kato, Hideki Sonoda, Masaki Ishikawa, (Japan Electronics Industry Ltd.) With the intention of eliminating the defects of conventional ABS systems, braking distance tests were performed by measuring continuously and directly p during the braking action, using a test car equipped with control logics. The test results verified a superior braking performance, especially for low-p load surfaces. 9535710 High Efficiency Machining by High Speed Grinding Keiji Shima, Fusao Nakajima, Tadayoshi Application of Camshaft Misumi, Akira Arakawa, Kazuhiko Kitanaka (Honda Engineering Co Ltd) In recent years, High Speed Grinding technology (HSG) have been progressed greatly. For HSG, there are many fundamental researches in laboratory, however not so many practical examples are in the mass production area yet. The authors have been working for applying HSG to automobile parts, aiming for short cycle time of grinding operation by using “Super Abrasive”. This paper shows our application of HSG for camshaft grinding in HONDA. 9535729 High Efficient Hobbing Yuji Yoshida, Nobuo Sugaya, Noboru Aoyama (Toyota Motor Corporation) In hobbing of an automobile transmission gear, multi-gash hobs and smaller outside diameter multi-gash hobs were tested in double efficiency. Among them, the 16-gashes hob showed the best result in tool cost. (Al,Ti)N-coated hobs and high pressure coolant had effects on reducing amount of hob wear in other tests. Double efficient hobbing was adopted in mass production with an (Al,Ti)N-coated 16-gashes hob and the high pressure coolant. This paper is also to report effect of hob shift on hob wear. 9535738 Development of a Low-cost and High-precision Gear Honing Method Yoshihiro Teramoto (Mazda Motor Corp.), Tatsuyuki Nakatani (Toy0 Advanced Technologies Co., Ltd.) The ear honing process have been some problems with the process in that Ql the post-honing accuracy of the teeth flanks depended on their
9535639 Development of the Lane-Keeping System Tadayuki Niibe, Kazunori Isomoto, Takamasa Suetomi, Tetsuro Butsuen (Mazda Motor Corporation) We have been developing collision avoidance systems which are designed to prevent traffic accidents stemming from human errors by generating alarms and/or automatically controlling vehicles. In this paper, we introduce “Lane-keeping” system that hinders human drivers from swerving out of his lane without his intention. This system comprises three elements, lane-marker recognition, excursion-prediction logic and automatic-steering actuator. The system is evaluated through “Real-time simulator” for vehicle control study. “Driving simulator” for human interface study, and field tests.
9535648 On the Hazard-Controllability of Distance-Warning SysYoshinobu Sato (Tokyo Univ. of Mercantile tems for Automobiles Marine), Eiichi Kato, Koichi Machida (Hino Motors, Ltd.) In the present paper, the hazard-controllability of distance-warningsystems for automobiles is estimated based on deductive methodology. First, hazards are identified and the targeted systems are defined. Next, accidents causation models are developed in terms of fault-trees with the hazards being top-events. The fault-trees are analyzed qualitatively and quantitatively. Then, the effectiveness of the distance-warning systems is estimated by comparing the statistics of the hazards for both vehicles equipped and not equipped with the distance-warning systems.
9535657 Study of a Novel Control Method of Steering System for a Radio-Controlled Truck Masanori Kobayashi, Taketoshi Kawabe, Sadahiro Takahashi, Yosito Watanabe (Nissan Diesel Motor Co., Ltd.) We investigated a robust control method applied to a DC-motor, the actuator of a steering system installed on a radio-controlled multi-loader truck. Requirements for the control system are robustness and stability against disturbances and change in plant characteristics, and rapid and accurate response to steering commands. To comply with these requirements, we applied a robust model matching (RMM) control method to the steering actuator. Results of simulation analyses and a hardware in the loop simulation show the effectiveness of this control method.
9535666 sion
Development of Damping Control System for Air SuspenKunihito Satoh, Takaaki Enomoto (Toyota Motor
Kazuo Ogawa,
Corporation) We have developed the continuous damping control system based on skyhook damper theory for air suspension. To put this system into practical use, the optimal parameters of the system are analyzed by using computer simulation. And the control strategy is designed to suit to the air suspension of which spring has nonlinear property. Since the control strategy and the system parameters are determined according to the simulation results, we were able to obtain an excellent combination of flat vehicle attitude, soft ride comfort and stable driving performance.
9535675 Active Suspension of Heavy Tracked Vehicle - Part 1: Bench Test Kiichi Kanagawa, Seikichi Nowada, Yukio Inoue, Takehiko Okazawa, Masatoshi Hashimoto (Technical Research and Development Institute, Japan Defense Agency) This paper describes the results of experiments for the Bench Test of Active Suspension System. This system controls oil pressure of suspension cylinders, wheel displacement, hull pitch rate etc.. The results shows that the active suspension reduces pitch angle about 60 percent and the active suspension with variable dampers is effective at all vehicle speed ranges.
323
9535684 Development of the Active Damper Suspension Toshiro Hirai, Takahisa Tatarazako (Nissan Motor Co., Ltd.), Katuyuki Takagi, Mituo Sasaki (Unisiajecs Corporation) We have developed and put into practical use the Active Damper Suspension in which Skyhook Control - a highly regarded feature of the existing hydraulic active suspension - is achieved by controlling the damping force of the dampers. In developing this new suspension, the functions of the automotive suspension were thoroughly reexamined. As a result, the new suspension provides an unprecedented combination of smooth ride comfort and firm, well-damped driving performance by optimally adjusting the damping force in real time to match the vehicle behavior and road surface inputs. This paper describes the development aims set for this suspension system along with its configuration, operating mechanism and benefits. 9535693 Vehicle Stability Control in Limit Cornering by Active Masaki Yamamoto, Ken Koibuchi, Yoshiki Fukada, Shoji InaBrake gaki (Toyota Motor Corporation) Improvement of vehicle dynamics in limit cornering have been studied. Simulations and tests have verified that vehicle stability and course trace performance in limit cornering have been improved by the active brake control for each wheel, because which control has been able to manage the vehicle yawing moment utilizing difference braking force between left and right wheels and the vehicle deceleration utilizing sum braking force of all wheels. On the Performance of Vehicle Equipped with ABS Sys9535701 tem Using the Load Surface Frictional Coefficient, p(M-ABS). - In the New System Using the Frictional Force and the Superiority of Braking Performances for Low Speed and Low p. - Nagao Miyazaki, Ryuzo Kato, Hideki Sonoda, Masaki Ishikawa, (Japan Electronics Industry Ltd.) With the intention of eliminating the defects of conventional ABS systems, braking distance tests were performed by measuring continuously and directly p during the braking action, using a test car equipped with control logics. The test results verified a superior braking performance, especially for low-p load surfaces. 9535710 High Efficiency Machining by High Speed Grinding Keiji Shima, Fusao Nakajima, Tadayoshi Application of Camshaft Misumi, Akira Arakawa, Kazuhiko Kitanaka (Honda Engineering Co Ltd) In recent years, High Speed Grinding technology (HSG) have been progressed greatly. For HSG, there are many fundamental researches in laboratory, however not so many practical examples are in the mass production area yet. The authors have been working for applying HSG to automobile parts, aiming for short cycle time of grinding operation by using “Super Abrasive”. This paper shows our application of HSG for camshaft grinding in HONDA. 9535729 High Efficient Hobbing Yuji Yoshida, Nobuo Sugaya, Noboru Aoyama (Toyota Motor Corporation) In hobbing of an automobile transmission gear, multi-gash hobs and smaller outside diameter multi-gash hobs were tested in double efficiency. Among them, the 16-gashes hob showed the best result in tool cost. (Al,Ti)N-coated hobs and high pressure coolant had effects on reducing amount of hob wear in other tests. Double efficient hobbing was adopted in mass production with an (Al,Ti)N-coated 16-gashes hob and the high pressure coolant. This paper is also to report effect of hob shift on hob wear. 9535738 Development of a Low-cost and High-precision Gear Honing Method Yoshihiro Teramoto (Mazda Motor Corp.), Tatsuyuki Nakatani (Toy0 Advanced Technologies Co., Ltd.) The ear honing process have been some problems with the process in that Ql the post-honing accuracy of the teeth flanks depended on their