现代流控英文教学课件PPT.ppt

modern controls for hydraulic control systems,dr. yingjie gao director, institute of mechatronic control engineering yanshan university,industrial applications,introduction,introduction,course description,offers students and professionals: a reliable, complete volume of the most up-to-date hows and whys of todays hydraulic control system fundamentals. complete with insightful industry examples: it features the latest coverage of modeling and control systems with a widely accepted approach to systems design.,introduction,course objectives,students are expected to learn how to consolidate and apply skills learned previously model the dynamics of a typical system design control algorithms for desired requirement of a specific case apply the learned skills to other applications.,introduction,main topics,have a quick review on the fundamental of hydraulic control system design methodology for hydraulic system -starting from the load point of the system and working backward to the ultimate power source model the dynamics of a typical system design control algorithms for desired requirement of a specific case,introduction,learning method,request students to take an active role in the learning process 10 2-hour lectures (including in-class discussion) 2 student seminars 3 lab experiments 1 final exam,introduction,student seminar,each student group will give one seminar on selected topics. student seminars aim to exercise active learning, and develop students ability in problem synthesis and professional communication,introduction,course project,students are required to do a course project. students are encouraged to conduct their project by applying the method learned from this course in solving their research problems. students should consult the instructor on their project in first three weeks of the semester. a project report in conference paper format is required from each student.,introduction,examinations & grading,exam: all students are expected to take the exam (or submit the final result) at scheduled time. there will be no make-up exam. grading : seminar and report - 30% final exam - 40% course project and report - 30 %,mobile equipment,introduction,intelligent vehicle,and hydraulic control technology,hydraulic control system plays a key role in intelligent vehicles,introduction,hydraulic control system plays a key role in intelligent vehicles,introduction,shipboard hydraulic system,introduction,introduction,shipboard hydraulic system,steering gear (rudder, stern planes, etc.) deck machinery: anchor windless, winches, capstans weapons systems: gun mounts, launchers other applications: hydraulic presses, ramps, elevators, catapult retractor, blast shields, valve operations, etc.,industrial applications,introduction,foundmental principle,pascals law,pressure in a fluid acts equally in all directions,pressure = force/area,find pressure find f2,200 lbf,pressure = 10 psi,reservoir - storage tank pressure source - hydraulic pump (a-end) pressure user - (b-end) hydraulic motor - rotary motion hydraulic cylinder - linear motion piping systems valves, filters, heat exchangers accumulator - stores pressurized oil hydraulic fluid (normally oil),simple hydraulic system,foundmental principle,advantages of using oil as a hydraulic fluid,non-corrosive superb lubricant,foundmental principle,advantages of hydraulic systems,foundmental principle,convenient method of power transmission over long distances great flexibility variable speed control safety and reliability,disadvantages of hydraulic systems,foundmental principle,need for positive confinement fire hazard if leaks occur leaks in high pressure systems pose a safety hazard adequate oil filtration must be maintained,modeling,modeling hydraulic system,modeling,modeling hydraulic system,控制调节器,传感器,modeling,modeling hydraulic system,伺服阀,传感器,调节器,modeling,modeling hydraulic system,伺服阀,输出流量ql的线性化方程,伺服阀的动态模型,modeling,modeling hydraulic system,液压缸,传递到油缸内油液的总体积,modeling,modeling hydraulic system,液压缸,控制容积内压力变化（pl）,油缸输出力的变化为,modeling,modeling hydraulic system,负载,油缸输出力,负载的惯性力 粘性摩擦力 弹性负载力 其它负载力,modeling,modeling hydraulic system,管道,modeling,modeling hydraulic system,传感器,位移传感器可视为惯性环节,压力传感器可视为比例环节,modeling,modeling hydraulic system,控制调节器,伺服阀,传感器,调节器,modeling,modeling hydraulic system,系统的动态模型,introduction,students active role,2 student seminars 3 lab experiments 1 final exam a project report in conference paper format is required from each student.,introduction,possible project topics,the