2012 METU Lecture 5 Control of Smart Systems - Department of ...

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Hard Disc Drive Description • In a hard drive, the heads 'fly' above the disk surface with clearance of as little as 3 nanometres. The "flying height" is constantly decreasing to enable higher areal density. The flying height of the head is controlled by the design of an air-bearing etched onto the disk-facing surface of the slider. The role of the air bearing is to maintain the flying height constant as the head moves over the surface of the disk. If the head hits the disk's surface, a catastrophic head crash can result. 66
Hard Disc Drive Construction Details Platters of a Hard disc Hard disc head The microphotograph of the head shows that the size of the front face is about 0.3 mm. One functional part of the head is the round, orange structure in the middle - the lithographically defined copper coil of the write transducer. 67
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• • • • • • Lecture 1:
Page 3 and 4:
Control Technologies for Smart Syst
Page 5 and 6:
Control Systems Overview Definition
Page 7 and 8:
Control Systems Overview Root locus
Page 9 and 10:
Control System Technology • • M
Page 11 and 12:
Open Loop System • • Reference
Page 13 and 14:
Open Loop System Reference Input
Page 15 and 16: Error Detector Closed Loop System R
Page 17 and 18: Closed Loop System Sensor The outpu
Page 19 and 20: Closed Loop System The expression S
Page 21 and 22: Elements of Control Systems Respons
Page 29 and 30: Controller Operation Controller pro
Page 31 and 32: Compensated Controllers • Compens
Page 33 and 34: PID Controllers • The PID control
Page 35 and 36: PID Controllers u(t) + P + e(t) +
Page 37 and 38: PID Controllers - Limitations • W
Page 39 and 40: PID Controllers - Limitations & Sol
Page 41 and 42: Design of Control Systems - Process
Page 43 and 44: Design of Control Systems - Digital
Page 45 and 46: Design of Control Systems - Digital
Page 47 and 48: Algorithm Implementation Considerat
Page 49 and 50: Algorithm Implementation Considerat
Page 51 and 52: Control System Hardware Implementat
Page 63 and 64: Hard Disc Drive Description • Dis
Page 68 and 69: Hard Disc Drive Description • The
Page 70 and 71: Design Challenges • The pivot bea
Page 72 and 73: Computer Hard Disc Drive - Transfer
Page 74 and 75: Active Suspension Systems - Introdu
Page 76 and 77: Suspension Systems - Safety and Sta
Page 78 and 79: Suspension Systems - Currently Avai
Page 80 and 81: Suspension Systems - Operating Scen
Page 82 and 83: Suspension Systems - Bose System
Page 84 and 85: Active Suspension Systems Bose Acti
Page 86 and 87: Resources Feedback Control of Dynam
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2012 METU Lecture 5 Control of Smart Systems - Department of ...

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