MME 437 Exam 1 – Study Guide, Revision Notes, and Practice Questions for Exam
Preparation
Standard - ✔✔- Describes the safety related parts of the control system
- Purpose is to provide guidance of principles of design for the manufacturer of a robot,
controller, etc.
- Contains definitions of safety categories and performance levels (PL)
Performance Level (PL) - ✔✔- Value used to define the define the ability of safety-related parts
of control systems to perform a safety function under foreseeable conditions
- The PL must be equal to or higher than required performance level (PLr)
Basic Safety Standards - ✔✔- Comprises fundamental concepts, principles and requirements
with regard to general safety aspects applicable to a wide range of products and systems
- Ex: General principles for design, risk assessment and risk reduction
Group Safety Standards - ✔✔- Comprises safety aspects applicable to several products or
systems, or a family of similar products, making reference to basic safety standards
- Ex: Two hand control devices, hazardous substances, emergency stop, etc.
Product Safety Standards - ✔✔- Safety aspects for a specific product or system
- Ex: Machine tools, industrial robots, etc
Safety - ✔✔- Tolerable risk that is still present even when considered "safe"
Risk - ✔✔- Severity of harm x the probability of the occurrence of harm
, Risk Assessment Process - ✔✔1) Make clear the intended use and usage conditions of the
machine and estimate incorrect usage such as operation mistakes (limits of machine)
2) Identify the hazards present in the machine (hazard identification)
3) Estimate the degree of risk and the frequency of situations in which risk is present (risk
estimation)
4) Judge whether the degree of risk has been reduced to an acceptable level (risk evaluation)
Control System - ✔✔- Collection of interconnected components designed to achieve a desired
purpose
Mathematical Model - ✔✔- A representation of a physical system in terms of mathematical
equations
- Derived based on physical laws (Newton's law, etc.) in combination with experimental data
Design Gap - ✔✔- The gap exists between the complex physical system under investigation and
the model used in the control system synthesis
Iterative Design - ✔✔- Allows us to handle the design gap effectively while accomplishing
necessary trade-offs in complexity, performance, and cost in order to meet the design
specifications
Process - ✔✔- The device, plant, or system under control
- The input and output relationship represents the cause-and-effect relationship of the process
Control System II - ✔✔- An interconnection of components forming a system configuration
that will provide a desired response
Open-Loop Control Systems - ✔✔- Utilizes a controller or control actuator to obtain the
desired response
Preparation
Standard - ✔✔- Describes the safety related parts of the control system
- Purpose is to provide guidance of principles of design for the manufacturer of a robot,
controller, etc.
- Contains definitions of safety categories and performance levels (PL)
Performance Level (PL) - ✔✔- Value used to define the define the ability of safety-related parts
of control systems to perform a safety function under foreseeable conditions
- The PL must be equal to or higher than required performance level (PLr)
Basic Safety Standards - ✔✔- Comprises fundamental concepts, principles and requirements
with regard to general safety aspects applicable to a wide range of products and systems
- Ex: General principles for design, risk assessment and risk reduction
Group Safety Standards - ✔✔- Comprises safety aspects applicable to several products or
systems, or a family of similar products, making reference to basic safety standards
- Ex: Two hand control devices, hazardous substances, emergency stop, etc.
Product Safety Standards - ✔✔- Safety aspects for a specific product or system
- Ex: Machine tools, industrial robots, etc
Safety - ✔✔- Tolerable risk that is still present even when considered "safe"
Risk - ✔✔- Severity of harm x the probability of the occurrence of harm
, Risk Assessment Process - ✔✔1) Make clear the intended use and usage conditions of the
machine and estimate incorrect usage such as operation mistakes (limits of machine)
2) Identify the hazards present in the machine (hazard identification)
3) Estimate the degree of risk and the frequency of situations in which risk is present (risk
estimation)
4) Judge whether the degree of risk has been reduced to an acceptable level (risk evaluation)
Control System - ✔✔- Collection of interconnected components designed to achieve a desired
purpose
Mathematical Model - ✔✔- A representation of a physical system in terms of mathematical
equations
- Derived based on physical laws (Newton's law, etc.) in combination with experimental data
Design Gap - ✔✔- The gap exists between the complex physical system under investigation and
the model used in the control system synthesis
Iterative Design - ✔✔- Allows us to handle the design gap effectively while accomplishing
necessary trade-offs in complexity, performance, and cost in order to meet the design
specifications
Process - ✔✔- The device, plant, or system under control
- The input and output relationship represents the cause-and-effect relationship of the process
Control System II - ✔✔- An interconnection of components forming a system configuration
that will provide a desired response
Open-Loop Control Systems - ✔✔- Utilizes a controller or control actuator to obtain the
desired response
