Analysis Of Goat Movement Characteristics And Design Of Bionic Vibration Reduction Device

Vibration exists in the operation of various machinery generally.Machinery is widely used in persons' daily life.Numerous kinds of mechanical equipment bring efficiency and convenience to people.At the same time bring vibration hazards more or less.Severe vibration will cause body injury on skeleton,muscle and joint.Resulting in building and bridge damaged.Sustaining steady-state vibration will affect the internal organs function.Leading to headaches,tinnitus and other discomfort.Shortening the service life of buildings.Interfering with the precision instruments to realize the design accuracy.With the development of economy and the progress of science and technology,people's demand of life quality and working environment is increasing day by day.It is important that reduce vibration hazard appropriately and strive to eliminate the vibration damage in order to lift people's living comfort level and improve people's quality of work.This study starts with movement observation of goat.Design inspiration of bionic vibration reduction device derives from research of goat movement characteristics.Goat capsula ungualae as bionic prototype,bionic vibration reduction structure is designed.Goat right forelimb as bionic prototype,bionic vibration joint is designed.Through combinational design of the bionic structure and the bionic joint,bionic vibration reduction device with two kinds of vibration reduction effect is designed.Based on goat movement preliminary observation,goat movement observation test platform is designed.The test platform provides a kind of centralized observation method about goat static and exercise in different conditions.3D model of the test platform is constructed by use of Solid Works 2016.Specific observable content include:1)Limbs and trunk balance control mode of goat which is still standing on the plane during plane slowly changing to slope.2)Similarities and differences of goat movement mode among walking on the plane,15°slope and 25°slope.3)Goat movement gait during left turning and right turning.4)Limbs and trunk balance control mode of goat which is still standing on the plane after getting disturbance from foot.The disturbance is divided translation and rotation two types.II According to test space and processing cost,the designed goat movement observation test platform is improved.After structure improvement,position adjustment and parts replacement,test platform which can be used in the experiment is set up.A kind of goat movement gait cycle observation method is designed.Kinematic data of goat is captured.Body features of goat still standing on 0°,4°,8°,12°,16°,20°six kinds of slope is gained.Gait cycle of goat exercise at 1km/h,2km/h,3km/h,4 km/h,5 km/h five kinds of speed on 0°,10°,20°three kinds of slope is gotten.Goat gait cycle law in five kinds of movement mode is summarized and analyzed.The five kinds of movement mode is discrete motion of relaxed goat on 0°slope,discrete motion of relaxed goat on 10°slope,continuous motion of relaxed goat on 10°slope,continuous motion of tired goat on 10°slope,and continuous motion of relaxed goat on 20°slope respectively.Balance control mode of goat which is still standing on different kinds of slope is summarized briefly.Video recording,image processing,gait analysis,as well as summary of motion law about goats during three kinds of situation have been done.The first situation is that two goats walk on the level road straightly at slow,medium and fast speed.The second situation is that two goats up and down stairs at different speeds.The last situation is that two goats exercise in special condition.Based on goat capsule ungualae observation,bionic vibration reduction structure is designed with capsule ungualae as bionic prototype.Samples is prepared by use of casting molding method.Bionic samples have hole.Standard samples have no hole.Bionic vibration reduction structure performance test system is designed and constructed.Pore slant angle,pressure piece mass,and excitation voltage are set as test factors.Natural frequency and maximum transfer ration are set as test index.Experiments optimization design method has been used.Test results have been calculated and analyzed by use of curve analysis method,polar difference analysis method,and partial orthogonal polynomial regression analysis method.Peel of goat right forelimb and right hind limb are removed.Based on passive movement observation of right forelimb and hind limb,right forelimb is selected as bionic prototype.Meat of goat right forelimb is removed,then it is measured.Referring to right forelimb movement mode and course,bionic vibration reduction joint is designed.Firstly from simple to complex,and then from complex to simple,finally there are six generations of bionic vibration reduction joint which is gained by use of software Solid Works 2016.Vibration reduction mechanism of each generation bionic joint is analyzed.The fifth and sixth generation bionic joint are selected as main research object.And mathematical modeling and simulation analysis have been done.Using software Solid Works 2016,bionic vibration reduction rack,bionic vibration reduction leg and bionic vibration reduction platform are designed.In this study,we suggest a kind of goat movement observation test platform.The test platform can realize synchronous data acquisition of kinematics,dynamics and electromyographic signal.It provides the guarantee for goat centralized research of movement gait,stress reaction and balance control mode.We treat goat capsula ungualae as bionic prototype,designing bionic vibration reduction structure.It triggers a new thinking that bionics be used for steady-state vibration reduction.We treat goat right forelimb as bionic prototype,designing bionic vibration reduction joint.It realizes stiffness functional controllable of vibration reduction joint.