DC Modular Servo System

The modular servo system enables students to study the theory and practice of automatic control systems. It illustrates modern circuit and constructional techniques. The system is modular and, therefore, versatile. Each unit is fitted with a magnetic base which holds the unit to the plastic coated steel baseplate, irrespective of the angle at which the baseplate is positioned. Individual units may be so arranged to create operating block schematic systems and interconnections between the units are made by jumper leads terminated in 4 mm stackable plugs. The modular concept of the MS150 system permits the study of individual units and also, by combination, the investigation and performance testing of complete systems. A series of instructional manuals is supplied to provide comprehensive coverage of servo system theory and assignments.

Purchasing Options

• MS150 d.c. Modular Servo System (comprises units, A, B, C, D, E, F, H, K, L, X & Z), or
• MS150A a.c. Modular Servo System (comprises units A, B, D, E, K, L, R, S, T, U, V, W, X & Z), or
• MS150-2 d.c./a.c. Modular Servo System (comprises units A, B, C, D, E, F, H, K, L, R, S, T, U, V, W, X & Z), or
• MS150-3 Complete Modular Servo System (comprises units A, B, C, D, E, F, G, H, J, K, L, M, R, S, T, U, V, W, X, Y & Z)

Upgrades

• To upgrade from MS150 to MS150-2, purchase the MS150 units R, S, T, U, V, W
• To upgrade from MS150A to MS150-2, purchase the MS150 units C, F, H
• To upgrade from MS150-2 to MST150-3, purchase MS150 units G, J, M, Y

Features

• Modular & flexible
• Self-contained units with mimic diagrams on function blocks
• Units can be investigated individually before building systems
• "Hands on" assembly of working systems
• Magnetic unit bases creating a versatile & stable system
• Robust product used & trusted for many years
• Can be used for advanced work
• Upgrade pack (33-310-PCI) to enable MATLAB compatibility, alternatively see product 33-008-PCI
• Comprehensive theory & experiment manual

Curriculum Coverage (MS150)

• Operational amplifiers
• Motor speed characteristics
• d.c. error channel
• Simple position control
• Closed-loop position control
• Simple speed control
• Deadband & step response
• Velocity feedback
• Analysis of simple speed control with speed response
• Position response
• Closed-loop frequency response
• Identification of motor time constants
• Identification of velocity error constant
• Frequency and transient response
• Measurement of following error
• Stability considerations & the use of lead, lag & combined networks
• Tachogenerator feedback & the effect on system performance
• Acceleration feedback
• Linearisation of systems

Curriculum Coverage (MS150A)

• Motor characteristics
• a.c. tachogenerator
• Motor speed control
• a.c. pre-amplifiers
• Position control system
• Importance of correct phasing on performance
• Compensation using the adjustable notch filter
• Notch filter design exercises
• Frequency selective
• Characteristics for the elimination of noise & harmonics
• Detailed analysis of carrier system
• Frequency transformation for compensator techniques
• Principles & measurement of compensation unit characteristics
• Measurement of system characteristics
• Instability
• Reduction in steady following error

Curriculum Coverage (MS150-2)

• Curriculum coverage of MS150 plus MS150A

Curriculum Coverage (MS150-3)

Curriculum coverage of MS150 plus MS150A plus the following:

• Relay characteristics
• Relay-operated control system
• Following characteristics of relay system
• Effect of backlash on system stability
• Relay-operated speed-control system
• Phase-plane analysis
• Motor charcteristics - trajectories
• Trajectory for a sequence of switchings
• Phase-plane analysis of relay-operated systems
• Rotation of switching lines by velocity feedback
• Waveform sampling
• Sampled data servo control system
• Simulated sampled data control system
• Sampled data process control system - transfer functions of hold circuits and the sampling theorem
• Speed control of an MS150 servo
• Position control
• Following error

• Upgrade from MS150 to MS150-2, purchase units R, S, T, U, V, W
• Upgrade from MS150A to MS150-2, purchase units C, F, H
• Upgrade from MS150-2 to MS150-3, purchase units G, J, M, Y